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| | | .\" ======================================================================== |
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| | | .IX Title "FFMPEG-PROTOCOLS 1" |
| | | .TH FFMPEG-PROTOCOLS 1 " " " " " " |
| | | .\" For nroff, turn off justification. Always turn off hyphenation; it makes |
| | | .\" way too many mistakes in technical documents. |
| | | .if n .ad l |
| | | .nh |
| | | .SH "NAME" |
| | | ffmpeg\-protocols \- FFmpeg protocols |
| | | .SH "DESCRIPTION" |
| | | .IX Header "DESCRIPTION" |
| | | This document describes the input and output protocols provided by the |
| | | libavformat library. |
| | | .SH "PROTOCOL OPTIONS" |
| | | .IX Header "PROTOCOL OPTIONS" |
| | | The libavformat library provides some generic global options, which |
| | | can be set on all the protocols. In addition each protocol may support |
| | | so-called private options, which are specific for that component. |
| | | .PP |
| | | Options may be set by specifying \-\fIoption\fR \fIvalue\fR in the |
| | | FFmpeg tools, or by setting the value explicitly in the |
| | | \&\f(CW\*(C`AVFormatContext\*(C'\fR options or using the \fIlibavutil/opt.h\fR \s-1API\s0 |
| | | for programmatic use. |
| | | .PP |
| | | The list of supported options follows: |
| | | .IP "\fBprotocol_whitelist\fR \fIlist\fR \fB(\fR\fIinput\fR\fB)\fR" 4 |
| | | .IX Item "protocol_whitelist list (input)" |
| | | Set a \*(L",\*(R"\-separated list of allowed protocols. \*(L"\s-1ALL\s0\*(R" matches all protocols. Protocols |
| | | prefixed by \*(L"\-\*(R" are disabled. |
| | | All protocols are allowed by default but protocols used by an another |
| | | protocol (nested protocols) are restricted to a per protocol subset. |
| | | .SH "PROTOCOLS" |
| | | .IX Header "PROTOCOLS" |
| | | Protocols are configured elements in FFmpeg that enable access to |
| | | resources that require specific protocols. |
| | | .PP |
| | | When you configure your FFmpeg build, all the supported protocols are |
| | | enabled by default. You can list all available ones using the |
| | | configure option \*(L"\-\-list\-protocols\*(R". |
| | | .PP |
| | | You can disable all the protocols using the configure option |
| | | \&\*(L"\-\-disable\-protocols\*(R", and selectively enable a protocol using the |
| | | option "\-\-enable\-protocol=\fI\s-1PROTOCOL\s0\fR\*(L", or you can disable a |
| | | particular protocol using the option |
| | | \&\*(R"\-\-disable\-protocol=\fI\s-1PROTOCOL\s0\fR". |
| | | .PP |
| | | The option \*(L"\-protocols\*(R" of the ff* tools will display the list of |
| | | supported protocols. |
| | | .PP |
| | | All protocols accept the following options: |
| | | .IP "\fBrw_timeout\fR" 4 |
| | | .IX Item "rw_timeout" |
| | | Maximum time to wait for (network) read/write operations to complete, |
| | | in microseconds. |
| | | .PP |
| | | A description of the currently available protocols follows. |
| | | .SS "async" |
| | | .IX Subsection "async" |
| | | Asynchronous data filling wrapper for input stream. |
| | | .PP |
| | | Fill data in a background thread, to decouple I/O operation from demux thread. |
| | | .PP |
| | | .Vb 3 |
| | | \& async:<URL> |
| | | \& async:http://host/resource |
| | | \& async:cache:http://host/resource |
| | | .Ve |
| | | .SS "bluray" |
| | | .IX Subsection "bluray" |
| | | Read BluRay playlist. |
| | | .PP |
| | | The accepted options are: |
| | | .IP "\fBangle\fR" 4 |
| | | .IX Item "angle" |
| | | BluRay angle |
| | | .IP "\fBchapter\fR" 4 |
| | | .IX Item "chapter" |
| | | Start chapter (1...N) |
| | | .IP "\fBplaylist\fR" 4 |
| | | .IX Item "playlist" |
| | | Playlist to read (\s-1BDMV/PLAYLIST/\s0?????.mpls) |
| | | .PP |
| | | Examples: |
| | | .PP |
| | | Read longest playlist from BluRay mounted to /mnt/bluray: |
| | | .PP |
| | | .Vb 1 |
| | | \& bluray:/mnt/bluray |
| | | .Ve |
| | | .PP |
| | | Read angle 2 of playlist 4 from BluRay mounted to /mnt/bluray, start from chapter 2: |
| | | .PP |
| | | .Vb 1 |
| | | \& \-playlist 4 \-angle 2 \-chapter 2 bluray:/mnt/bluray |
| | | .Ve |
| | | .SS "cache" |
| | | .IX Subsection "cache" |
| | | Caching wrapper for input stream. |
| | | .PP |
| | | Cache the input stream to temporary file. It brings seeking capability to live streams. |
| | | .PP |
| | | .Vb 1 |
| | | \& cache:<URL> |
| | | .Ve |
| | | .SS "concat" |
| | | .IX Subsection "concat" |
| | | Physical concatenation protocol. |
| | | .PP |
| | | Read and seek from many resources in sequence as if they were |
| | | a unique resource. |
| | | .PP |
| | | A \s-1URL\s0 accepted by this protocol has the syntax: |
| | | .PP |
| | | .Vb 1 |
| | | \& concat:<URL1>|<URL2>|...|<URLN> |
| | | .Ve |
| | | .PP |
| | | where \fI\s-1URL1\s0\fR, \fI\s-1URL2\s0\fR, ..., \fI\s-1URLN\s0\fR are the urls of the |
| | | resource to be concatenated, each one possibly specifying a distinct |
| | | protocol. |
| | | .PP |
| | | For example to read a sequence of files \fIsplit1.mpeg\fR, |
| | | \&\fIsplit2.mpeg\fR, \fIsplit3.mpeg\fR with \fBffplay\fR use the |
| | | command: |
| | | .PP |
| | | .Vb 1 |
| | | \& ffplay concat:split1.mpeg\e|split2.mpeg\e|split3.mpeg |
| | | .Ve |
| | | .PP |
| | | Note that you may need to escape the character \*(L"|\*(R" which is special for |
| | | many shells. |
| | | .SS "crypto" |
| | | .IX Subsection "crypto" |
| | | AES-encrypted stream reading protocol. |
| | | .PP |
| | | The accepted options are: |
| | | .IP "\fBkey\fR" 4 |
| | | .IX Item "key" |
| | | Set the \s-1AES\s0 decryption key binary block from given hexadecimal representation. |
| | | .IP "\fBiv\fR" 4 |
| | | .IX Item "iv" |
| | | Set the \s-1AES\s0 decryption initialization vector binary block from given hexadecimal representation. |
| | | .PP |
| | | Accepted \s-1URL\s0 formats: |
| | | .PP |
| | | .Vb 2 |
| | | \& crypto:<URL> |
| | | \& crypto+<URL> |
| | | .Ve |
| | | .SS "data" |
| | | .IX Subsection "data" |
| | | Data in-line in the \s-1URI\s0. See <\fBhttp://en.wikipedia.org/wiki/Data_URI_scheme\fR>. |
| | | .PP |
| | | For example, to convert a \s-1GIF\s0 file given inline with \fBffmpeg\fR: |
| | | .PP |
| | | .Vb 1 |
| | | \& ffmpeg \-i "data:image/gif;base64,R0lGODdhCAAIAMIEAAAAAAAA//8AAP//AP///////////////ywAAAAACAAIAAADF0gEDLojDgdGiJdJqUX02iB4E8Q9jUMkADs=" smiley.png |
| | | .Ve |
| | | .SS "file" |
| | | .IX Subsection "file" |
| | | File access protocol. |
| | | .PP |
| | | Read from or write to a file. |
| | | .PP |
| | | A file \s-1URL\s0 can have the form: |
| | | .PP |
| | | .Vb 1 |
| | | \& file:<filename> |
| | | .Ve |
| | | .PP |
| | | where \fIfilename\fR is the path of the file to read. |
| | | .PP |
| | | An \s-1URL\s0 that does not have a protocol prefix will be assumed to be a |
| | | file \s-1URL\s0. Depending on the build, an \s-1URL\s0 that looks like a Windows |
| | | path with the drive letter at the beginning will also be assumed to be |
| | | a file \s-1URL\s0 (usually not the case in builds for unix-like systems). |
| | | .PP |
| | | For example to read from a file \fIinput.mpeg\fR with \fBffmpeg\fR |
| | | use the command: |
| | | .PP |
| | | .Vb 1 |
| | | \& ffmpeg \-i file:input.mpeg output.mpeg |
| | | .Ve |
| | | .PP |
| | | This protocol accepts the following options: |
| | | .IP "\fBtruncate\fR" 4 |
| | | .IX Item "truncate" |
| | | Truncate existing files on write, if set to 1. A value of 0 prevents |
| | | truncating. Default value is 1. |
| | | .IP "\fBblocksize\fR" 4 |
| | | .IX Item "blocksize" |
| | | Set I/O operation maximum block size, in bytes. Default value is |
| | | \&\f(CW\*(C`INT_MAX\*(C'\fR, which results in not limiting the requested block size. |
| | | Setting this value reasonably low improves user termination request reaction |
| | | time, which is valuable for files on slow medium. |
| | | .SS "ftp" |
| | | .IX Subsection "ftp" |
| | | \&\s-1FTP\s0 (File Transfer Protocol). |
| | | .PP |
| | | Read from or write to remote resources using \s-1FTP\s0 protocol. |
| | | .PP |
| | | Following syntax is required. |
| | | .PP |
| | | .Vb 1 |
| | | \& ftp://[user[:password]@]server[:port]/path/to/remote/resource.mpeg |
| | | .Ve |
| | | .PP |
| | | This protocol accepts the following options. |
| | | .IP "\fBtimeout\fR" 4 |
| | | .IX Item "timeout" |
| | | Set timeout in microseconds of socket I/O operations used by the underlying low level |
| | | operation. By default it is set to \-1, which means that the timeout is |
| | | not specified. |
| | | .IP "\fBftp-anonymous-password\fR" 4 |
| | | .IX Item "ftp-anonymous-password" |
| | | Password used when login as anonymous user. Typically an e\-mail address |
| | | should be used. |
| | | .IP "\fBftp-write-seekable\fR" 4 |
| | | .IX Item "ftp-write-seekable" |
| | | Control seekability of connection during encoding. If set to 1 the |
| | | resource is supposed to be seekable, if set to 0 it is assumed not |
| | | to be seekable. Default value is 0. |
| | | .PP |
| | | \&\s-1NOTE:\s0 Protocol can be used as output, but it is recommended to not do |
| | | it, unless special care is taken (tests, customized server configuration |
| | | etc.). Different \s-1FTP\s0 servers behave in different way during seek |
| | | operation. ff* tools may produce incomplete content due to server limitations. |
| | | .PP |
| | | This protocol accepts the following options: |
| | | .IP "\fBfollow\fR" 4 |
| | | .IX Item "follow" |
| | | If set to 1, the protocol will retry reading at the end of the file, allowing |
| | | reading files that still are being written. In order for this to terminate, |
| | | you either need to use the rw_timeout option, or use the interrupt callback |
| | | (for \s-1API\s0 users). |
| | | .SS "gopher" |
| | | .IX Subsection "gopher" |
| | | Gopher protocol. |
| | | .SS "hls" |
| | | .IX Subsection "hls" |
| | | Read Apple \s-1HTTP\s0 Live Streaming compliant segmented stream as |
| | | a uniform one. The M3U8 playlists describing the segments can be |
| | | remote \s-1HTTP\s0 resources or local files, accessed using the standard |
| | | file protocol. |
| | | The nested protocol is declared by specifying |
| | | "+\fIproto\fR" after the hls \s-1URI\s0 scheme name, where \fIproto\fR |
| | | is either \*(L"file\*(R" or \*(L"http\*(R". |
| | | .PP |
| | | .Vb 2 |
| | | \& hls+http://host/path/to/remote/resource.m3u8 |
| | | \& hls+file://path/to/local/resource.m3u8 |
| | | .Ve |
| | | .PP |
| | | Using this protocol is discouraged \- the hls demuxer should work |
| | | just as well (if not, please report the issues) and is more complete. |
| | | To use the hls demuxer instead, simply use the direct URLs to the |
| | | m3u8 files. |
| | | .SS "http" |
| | | .IX Subsection "http" |
| | | \&\s-1HTTP\s0 (Hyper Text Transfer Protocol). |
| | | .PP |
| | | This protocol accepts the following options: |
| | | .IP "\fBseekable\fR" 4 |
| | | .IX Item "seekable" |
| | | Control seekability of connection. If set to 1 the resource is |
| | | supposed to be seekable, if set to 0 it is assumed not to be seekable, |
| | | if set to \-1 it will try to autodetect if it is seekable. Default |
| | | value is \-1. |
| | | .IP "\fBchunked_post\fR" 4 |
| | | .IX Item "chunked_post" |
| | | If set to 1 use chunked Transfer-Encoding for posts, default is 1. |
| | | .IP "\fBcontent_type\fR" 4 |
| | | .IX Item "content_type" |
| | | Set a specific content type for the \s-1POST\s0 messages or for listen mode. |
| | | .IP "\fBhttp_proxy\fR" 4 |
| | | .IX Item "http_proxy" |
| | | set \s-1HTTP\s0 proxy to tunnel through e.g. http://example.com:1234 |
| | | .IP "\fBheaders\fR" 4 |
| | | .IX Item "headers" |
| | | Set custom \s-1HTTP\s0 headers, can override built in default headers. The |
| | | value must be a string encoding the headers. |
| | | .IP "\fBmultiple_requests\fR" 4 |
| | | .IX Item "multiple_requests" |
| | | Use persistent connections if set to 1, default is 0. |
| | | .IP "\fBpost_data\fR" 4 |
| | | .IX Item "post_data" |
| | | Set custom \s-1HTTP\s0 post data. |
| | | .IP "\fBreferer\fR" 4 |
| | | .IX Item "referer" |
| | | Set the Referer header. Include 'Referer: \s-1URL\s0' header in \s-1HTTP\s0 request. |
| | | .IP "\fBuser_agent\fR" 4 |
| | | .IX Item "user_agent" |
| | | Override the User-Agent header. If not specified the protocol will use a |
| | | string describing the libavformat build. (\*(L"Lavf/<version>\*(R") |
| | | .IP "\fBuser-agent\fR" 4 |
| | | .IX Item "user-agent" |
| | | This is a deprecated option, you can use user_agent instead it. |
| | | .IP "\fBtimeout\fR" 4 |
| | | .IX Item "timeout" |
| | | Set timeout in microseconds of socket I/O operations used by the underlying low level |
| | | operation. By default it is set to \-1, which means that the timeout is |
| | | not specified. |
| | | .IP "\fBreconnect_at_eof\fR" 4 |
| | | .IX Item "reconnect_at_eof" |
| | | If set then eof is treated like an error and causes reconnection, this is useful |
| | | for live / endless streams. |
| | | .IP "\fBreconnect_streamed\fR" 4 |
| | | .IX Item "reconnect_streamed" |
| | | If set then even streamed/non seekable streams will be reconnected on errors. |
| | | .IP "\fBreconnect_delay_max\fR" 4 |
| | | .IX Item "reconnect_delay_max" |
| | | Sets the maximum delay in seconds after which to give up reconnecting |
| | | .IP "\fBmime_type\fR" 4 |
| | | .IX Item "mime_type" |
| | | Export the \s-1MIME\s0 type. |
| | | .IP "\fBhttp_version\fR" 4 |
| | | .IX Item "http_version" |
| | | Exports the \s-1HTTP\s0 response version number. Usually \*(L"1.0\*(R" or \*(L"1.1\*(R". |
| | | .IP "\fBicy\fR" 4 |
| | | .IX Item "icy" |
| | | If set to 1 request \s-1ICY\s0 (SHOUTcast) metadata from the server. If the server |
| | | supports this, the metadata has to be retrieved by the application by reading |
| | | the \fBicy_metadata_headers\fR and \fBicy_metadata_packet\fR options. |
| | | The default is 1. |
| | | .IP "\fBicy_metadata_headers\fR" 4 |
| | | .IX Item "icy_metadata_headers" |
| | | If the server supports \s-1ICY\s0 metadata, this contains the ICY-specific \s-1HTTP\s0 reply |
| | | headers, separated by newline characters. |
| | | .IP "\fBicy_metadata_packet\fR" 4 |
| | | .IX Item "icy_metadata_packet" |
| | | If the server supports \s-1ICY\s0 metadata, and \fBicy\fR was set to 1, this |
| | | contains the last non-empty metadata packet sent by the server. It should be |
| | | polled in regular intervals by applications interested in mid-stream metadata |
| | | updates. |
| | | .IP "\fBcookies\fR" 4 |
| | | .IX Item "cookies" |
| | | Set the cookies to be sent in future requests. The format of each cookie is the |
| | | same as the value of a Set-Cookie \s-1HTTP\s0 response field. Multiple cookies can be |
| | | delimited by a newline character. |
| | | .IP "\fBoffset\fR" 4 |
| | | .IX Item "offset" |
| | | Set initial byte offset. |
| | | .IP "\fBend_offset\fR" 4 |
| | | .IX Item "end_offset" |
| | | Try to limit the request to bytes preceding this offset. |
| | | .IP "\fBmethod\fR" 4 |
| | | .IX Item "method" |
| | | When used as a client option it sets the \s-1HTTP\s0 method for the request. |
| | | .Sp |
| | | When used as a server option it sets the \s-1HTTP\s0 method that is going to be |
| | | expected from the client(s). |
| | | If the expected and the received \s-1HTTP\s0 method do not match the client will |
| | | be given a Bad Request response. |
| | | When unset the \s-1HTTP\s0 method is not checked for now. This will be replaced by |
| | | autodetection in the future. |
| | | .IP "\fBlisten\fR" 4 |
| | | .IX Item "listen" |
| | | If set to 1 enables experimental \s-1HTTP\s0 server. This can be used to send data when |
| | | used as an output option, or read data from a client with \s-1HTTP\s0 \s-1POST\s0 when used as |
| | | an input option. |
| | | If set to 2 enables experimental multi-client \s-1HTTP\s0 server. This is not yet implemented |
| | | in ffmpeg.c and thus must not be used as a command line option. |
| | | .Sp |
| | | .Vb 2 |
| | | \& # Server side (sending): |
| | | \& ffmpeg \-i somefile.ogg \-c copy \-listen 1 \-f ogg http://<server>:<port> |
| | | \& |
| | | \& # Client side (receiving): |
| | | \& ffmpeg \-i http://<server>:<port> \-c copy somefile.ogg |
| | | \& |
| | | \& # Client can also be done with wget: |
| | | \& wget http://<server>:<port> \-O somefile.ogg |
| | | \& |
| | | \& # Server side (receiving): |
| | | \& ffmpeg \-listen 1 \-i http://<server>:<port> \-c copy somefile.ogg |
| | | \& |
| | | \& # Client side (sending): |
| | | \& ffmpeg \-i somefile.ogg \-chunked_post 0 \-c copy \-f ogg http://<server>:<port> |
| | | \& |
| | | \& # Client can also be done with wget: |
| | | \& wget \-\-post\-file=somefile.ogg http://<server>:<port> |
| | | .Ve |
| | | .PP |
| | | \fI\s-1HTTP\s0 Cookies\fR |
| | | .IX Subsection "HTTP Cookies" |
| | | .PP |
| | | Some \s-1HTTP\s0 requests will be denied unless cookie values are passed in with the |
| | | request. The \fBcookies\fR option allows these cookies to be specified. At |
| | | the very least, each cookie must specify a value along with a path and domain. |
| | | \&\s-1HTTP\s0 requests that match both the domain and path will automatically include the |
| | | cookie value in the \s-1HTTP\s0 Cookie header field. Multiple cookies can be delimited |
| | | by a newline. |
| | | .PP |
| | | The required syntax to play a stream specifying a cookie is: |
| | | .PP |
| | | .Vb 1 |
| | | \& ffplay \-cookies "nlqptid=nltid=tsn; path=/; domain=somedomain.com;" http://somedomain.com/somestream.m3u8 |
| | | .Ve |
| | | .SS "Icecast" |
| | | .IX Subsection "Icecast" |
| | | Icecast protocol (stream to Icecast servers) |
| | | .PP |
| | | This protocol accepts the following options: |
| | | .IP "\fBice_genre\fR" 4 |
| | | .IX Item "ice_genre" |
| | | Set the stream genre. |
| | | .IP "\fBice_name\fR" 4 |
| | | .IX Item "ice_name" |
| | | Set the stream name. |
| | | .IP "\fBice_description\fR" 4 |
| | | .IX Item "ice_description" |
| | | Set the stream description. |
| | | .IP "\fBice_url\fR" 4 |
| | | .IX Item "ice_url" |
| | | Set the stream website \s-1URL\s0. |
| | | .IP "\fBice_public\fR" 4 |
| | | .IX Item "ice_public" |
| | | Set if the stream should be public. |
| | | The default is 0 (not public). |
| | | .IP "\fBuser_agent\fR" 4 |
| | | .IX Item "user_agent" |
| | | Override the User-Agent header. If not specified a string of the form |
| | | \&\*(L"Lavf/<version>\*(R" will be used. |
| | | .IP "\fBpassword\fR" 4 |
| | | .IX Item "password" |
| | | Set the Icecast mountpoint password. |
| | | .IP "\fBcontent_type\fR" 4 |
| | | .IX Item "content_type" |
| | | Set the stream content type. This must be set if it is different from |
| | | audio/mpeg. |
| | | .IP "\fBlegacy_icecast\fR" 4 |
| | | .IX Item "legacy_icecast" |
| | | This enables support for Icecast versions < 2.4.0, that do not support the |
| | | \&\s-1HTTP\s0 \s-1PUT\s0 method but the \s-1SOURCE\s0 method. |
| | | .PP |
| | | .Vb 1 |
| | | \& icecast://[<username>[:<password>]@]<server>:<port>/<mountpoint> |
| | | .Ve |
| | | .SS "mmst" |
| | | .IX Subsection "mmst" |
| | | \&\s-1MMS\s0 (Microsoft Media Server) protocol over \s-1TCP\s0. |
| | | .SS "mmsh" |
| | | .IX Subsection "mmsh" |
| | | \&\s-1MMS\s0 (Microsoft Media Server) protocol over \s-1HTTP\s0. |
| | | .PP |
| | | The required syntax is: |
| | | .PP |
| | | .Vb 1 |
| | | \& mmsh://<server>[:<port>][/<app>][/<playpath>] |
| | | .Ve |
| | | .SS "md5" |
| | | .IX Subsection "md5" |
| | | \&\s-1MD5\s0 output protocol. |
| | | .PP |
| | | Computes the \s-1MD5\s0 hash of the data to be written, and on close writes |
| | | this to the designated output or stdout if none is specified. It can |
| | | be used to test muxers without writing an actual file. |
| | | .PP |
| | | Some examples follow. |
| | | .PP |
| | | .Vb 2 |
| | | \& # Write the MD5 hash of the encoded AVI file to the file output.avi.md5. |
| | | \& ffmpeg \-i input.flv \-f avi \-y md5:output.avi.md5 |
| | | \& |
| | | \& # Write the MD5 hash of the encoded AVI file to stdout. |
| | | \& ffmpeg \-i input.flv \-f avi \-y md5: |
| | | .Ve |
| | | .PP |
| | | Note that some formats (typically \s-1MOV\s0) require the output protocol to |
| | | be seekable, so they will fail with the \s-1MD5\s0 output protocol. |
| | | .SS "pipe" |
| | | .IX Subsection "pipe" |
| | | \&\s-1UNIX\s0 pipe access protocol. |
| | | .PP |
| | | Read and write from \s-1UNIX\s0 pipes. |
| | | .PP |
| | | The accepted syntax is: |
| | | .PP |
| | | .Vb 1 |
| | | \& pipe:[<number>] |
| | | .Ve |
| | | .PP |
| | | \&\fInumber\fR is the number corresponding to the file descriptor of the |
| | | pipe (e.g. 0 for stdin, 1 for stdout, 2 for stderr). If \fInumber\fR |
| | | is not specified, by default the stdout file descriptor will be used |
| | | for writing, stdin for reading. |
| | | .PP |
| | | For example to read from stdin with \fBffmpeg\fR: |
| | | .PP |
| | | .Vb 3 |
| | | \& cat test.wav | ffmpeg \-i pipe:0 |
| | | \& # ...this is the same as... |
| | | \& cat test.wav | ffmpeg \-i pipe: |
| | | .Ve |
| | | .PP |
| | | For writing to stdout with \fBffmpeg\fR: |
| | | .PP |
| | | .Vb 3 |
| | | \& ffmpeg \-i test.wav \-f avi pipe:1 | cat > test.avi |
| | | \& # ...this is the same as... |
| | | \& ffmpeg \-i test.wav \-f avi pipe: | cat > test.avi |
| | | .Ve |
| | | .PP |
| | | This protocol accepts the following options: |
| | | .IP "\fBblocksize\fR" 4 |
| | | .IX Item "blocksize" |
| | | Set I/O operation maximum block size, in bytes. Default value is |
| | | \&\f(CW\*(C`INT_MAX\*(C'\fR, which results in not limiting the requested block size. |
| | | Setting this value reasonably low improves user termination request reaction |
| | | time, which is valuable if data transmission is slow. |
| | | .PP |
| | | Note that some formats (typically \s-1MOV\s0), require the output protocol to |
| | | be seekable, so they will fail with the pipe output protocol. |
| | | .SS "prompeg" |
| | | .IX Subsection "prompeg" |
| | | Pro-MPEG Code of Practice #3 Release 2 \s-1FEC\s0 protocol. |
| | | .PP |
| | | The Pro-MPEG CoP#3 \s-1FEC\s0 is a 2D parity-check forward error correction mechanism |
| | | for \s-1MPEG\-2\s0 Transport Streams sent over \s-1RTP\s0. |
| | | .PP |
| | | This protocol must be used in conjunction with the \f(CW\*(C`rtp_mpegts\*(C'\fR muxer and |
| | | the \f(CW\*(C`rtp\*(C'\fR protocol. |
| | | .PP |
| | | The required syntax is: |
| | | .PP |
| | | .Vb 1 |
| | | \& \-f rtp_mpegts \-fec prompeg=<option>=<val>... rtp://<hostname>:<port> |
| | | .Ve |
| | | .PP |
| | | The destination \s-1UDP\s0 ports are \f(CW\*(C`port + 2\*(C'\fR for the column \s-1FEC\s0 stream |
| | | and \f(CW\*(C`port + 4\*(C'\fR for the row \s-1FEC\s0 stream. |
| | | .PP |
| | | This protocol accepts the following options: |
| | | .IP "\fBl=\fR\fIn\fR" 4 |
| | | .IX Item "l=n" |
| | | The number of columns (4\-20, LxD <= 100) |
| | | .IP "\fBd=\fR\fIn\fR" 4 |
| | | .IX Item "d=n" |
| | | The number of rows (4\-20, LxD <= 100) |
| | | .PP |
| | | Example usage: |
| | | .PP |
| | | .Vb 1 |
| | | \& \-f rtp_mpegts \-fec prompeg=l=8:d=4 rtp://<hostname>:<port> |
| | | .Ve |
| | | .SS "rtmp" |
| | | .IX Subsection "rtmp" |
| | | Real-Time Messaging Protocol. |
| | | .PP |
| | | The Real-Time Messaging Protocol (\s-1RTMP\s0) is used for streaming multimedia |
| | | content across a \s-1TCP/IP\s0 network. |
| | | .PP |
| | | The required syntax is: |
| | | .PP |
| | | .Vb 1 |
| | | \& rtmp://[<username>:<password>@]<server>[:<port>][/<app>][/<instance>][/<playpath>] |
| | | .Ve |
| | | .PP |
| | | The accepted parameters are: |
| | | .IP "\fBusername\fR" 4 |
| | | .IX Item "username" |
| | | An optional username (mostly for publishing). |
| | | .IP "\fBpassword\fR" 4 |
| | | .IX Item "password" |
| | | An optional password (mostly for publishing). |
| | | .IP "\fBserver\fR" 4 |
| | | .IX Item "server" |
| | | The address of the \s-1RTMP\s0 server. |
| | | .IP "\fBport\fR" 4 |
| | | .IX Item "port" |
| | | The number of the \s-1TCP\s0 port to use (by default is 1935). |
| | | .IP "\fBapp\fR" 4 |
| | | .IX Item "app" |
| | | It is the name of the application to access. It usually corresponds to |
| | | the path where the application is installed on the \s-1RTMP\s0 server |
| | | (e.g. \fI/ondemand/\fR, \fI/flash/live/\fR, etc.). You can override |
| | | the value parsed from the \s-1URI\s0 through the \f(CW\*(C`rtmp_app\*(C'\fR option, too. |
| | | .IP "\fBplaypath\fR" 4 |
| | | .IX Item "playpath" |
| | | It is the path or name of the resource to play with reference to the |
| | | application specified in \fIapp\fR, may be prefixed by \*(L"mp4:\*(R". You |
| | | can override the value parsed from the \s-1URI\s0 through the \f(CW\*(C`rtmp_playpath\*(C'\fR |
| | | option, too. |
| | | .IP "\fBlisten\fR" 4 |
| | | .IX Item "listen" |
| | | Act as a server, listening for an incoming connection. |
| | | .IP "\fBtimeout\fR" 4 |
| | | .IX Item "timeout" |
| | | Maximum time to wait for the incoming connection. Implies listen. |
| | | .PP |
| | | Additionally, the following parameters can be set via command line options |
| | | (or in code via \f(CW\*(C`AVOption\*(C'\fRs): |
| | | .IP "\fBrtmp_app\fR" 4 |
| | | .IX Item "rtmp_app" |
| | | Name of application to connect on the \s-1RTMP\s0 server. This option |
| | | overrides the parameter specified in the \s-1URI\s0. |
| | | .IP "\fBrtmp_buffer\fR" 4 |
| | | .IX Item "rtmp_buffer" |
| | | Set the client buffer time in milliseconds. The default is 3000. |
| | | .IP "\fBrtmp_conn\fR" 4 |
| | | .IX Item "rtmp_conn" |
| | | Extra arbitrary \s-1AMF\s0 connection parameters, parsed from a string, |
| | | e.g. like \f(CW\*(C`B:1 S:authMe O:1 NN:code:1.23 NS:flag:ok O:0\*(C'\fR. |
| | | Each value is prefixed by a single character denoting the type, |
| | | B for Boolean, N for number, S for string, O for object, or Z for null, |
| | | followed by a colon. For Booleans the data must be either 0 or 1 for |
| | | \&\s-1FALSE\s0 or \s-1TRUE\s0, respectively. Likewise for Objects the data must be 0 or |
| | | 1 to end or begin an object, respectively. Data items in subobjects may |
| | | be named, by prefixing the type with 'N' and specifying the name before |
| | | the value (i.e. \f(CW\*(C`NB:myFlag:1\*(C'\fR). This option may be used multiple |
| | | times to construct arbitrary \s-1AMF\s0 sequences. |
| | | .IP "\fBrtmp_flashver\fR" 4 |
| | | .IX Item "rtmp_flashver" |
| | | Version of the Flash plugin used to run the \s-1SWF\s0 player. The default |
| | | is \s-1LNX\s0 9,0,124,2. (When publishing, the default is \s-1FMLE/3\s0.0 (compatible; |
| | | <libavformat version>).) |
| | | .IP "\fBrtmp_flush_interval\fR" 4 |
| | | .IX Item "rtmp_flush_interval" |
| | | Number of packets flushed in the same request (\s-1RTMPT\s0 only). The default |
| | | is 10. |
| | | .IP "\fBrtmp_live\fR" 4 |
| | | .IX Item "rtmp_live" |
| | | Specify that the media is a live stream. No resuming or seeking in |
| | | live streams is possible. The default value is \f(CW\*(C`any\*(C'\fR, which means the |
| | | subscriber first tries to play the live stream specified in the |
| | | playpath. If a live stream of that name is not found, it plays the |
| | | recorded stream. The other possible values are \f(CW\*(C`live\*(C'\fR and |
| | | \&\f(CW\*(C`recorded\*(C'\fR. |
| | | .IP "\fBrtmp_pageurl\fR" 4 |
| | | .IX Item "rtmp_pageurl" |
| | | \&\s-1URL\s0 of the web page in which the media was embedded. By default no |
| | | value will be sent. |
| | | .IP "\fBrtmp_playpath\fR" 4 |
| | | .IX Item "rtmp_playpath" |
| | | Stream identifier to play or to publish. This option overrides the |
| | | parameter specified in the \s-1URI\s0. |
| | | .IP "\fBrtmp_subscribe\fR" 4 |
| | | .IX Item "rtmp_subscribe" |
| | | Name of live stream to subscribe to. By default no value will be sent. |
| | | It is only sent if the option is specified or if rtmp_live |
| | | is set to live. |
| | | .IP "\fBrtmp_swfhash\fR" 4 |
| | | .IX Item "rtmp_swfhash" |
| | | \&\s-1SHA256\s0 hash of the decompressed \s-1SWF\s0 file (32 bytes). |
| | | .IP "\fBrtmp_swfsize\fR" 4 |
| | | .IX Item "rtmp_swfsize" |
| | | Size of the decompressed \s-1SWF\s0 file, required for SWFVerification. |
| | | .IP "\fBrtmp_swfurl\fR" 4 |
| | | .IX Item "rtmp_swfurl" |
| | | \&\s-1URL\s0 of the \s-1SWF\s0 player for the media. By default no value will be sent. |
| | | .IP "\fBrtmp_swfverify\fR" 4 |
| | | .IX Item "rtmp_swfverify" |
| | | \&\s-1URL\s0 to player swf file, compute hash/size automatically. |
| | | .IP "\fBrtmp_tcurl\fR" 4 |
| | | .IX Item "rtmp_tcurl" |
| | | \&\s-1URL\s0 of the target stream. Defaults to proto://host[:port]/app. |
| | | .PP |
| | | For example to read with \fBffplay\fR a multimedia resource named |
| | | \&\*(L"sample\*(R" from the application \*(L"vod\*(R" from an \s-1RTMP\s0 server \*(L"myserver\*(R": |
| | | .PP |
| | | .Vb 1 |
| | | \& ffplay rtmp://myserver/vod/sample |
| | | .Ve |
| | | .PP |
| | | To publish to a password protected server, passing the playpath and |
| | | app names separately: |
| | | .PP |
| | | .Vb 1 |
| | | \& ffmpeg \-re \-i <input> \-f flv \-rtmp_playpath some/long/path \-rtmp_app long/app/name rtmp://username:password@myserver/ |
| | | .Ve |
| | | .SS "rtmpe" |
| | | .IX Subsection "rtmpe" |
| | | Encrypted Real-Time Messaging Protocol. |
| | | .PP |
| | | The Encrypted Real-Time Messaging Protocol (\s-1RTMPE\s0) is used for |
| | | streaming multimedia content within standard cryptographic primitives, |
| | | consisting of Diffie-Hellman key exchange and \s-1HMACSHA256\s0, generating |
| | | a pair of \s-1RC4\s0 keys. |
| | | .SS "rtmps" |
| | | .IX Subsection "rtmps" |
| | | Real-Time Messaging Protocol over a secure \s-1SSL\s0 connection. |
| | | .PP |
| | | The Real-Time Messaging Protocol (\s-1RTMPS\s0) is used for streaming |
| | | multimedia content across an encrypted connection. |
| | | .SS "rtmpt" |
| | | .IX Subsection "rtmpt" |
| | | Real-Time Messaging Protocol tunneled through \s-1HTTP\s0. |
| | | .PP |
| | | The Real-Time Messaging Protocol tunneled through \s-1HTTP\s0 (\s-1RTMPT\s0) is used |
| | | for streaming multimedia content within \s-1HTTP\s0 requests to traverse |
| | | firewalls. |
| | | .SS "rtmpte" |
| | | .IX Subsection "rtmpte" |
| | | Encrypted Real-Time Messaging Protocol tunneled through \s-1HTTP\s0. |
| | | .PP |
| | | The Encrypted Real-Time Messaging Protocol tunneled through \s-1HTTP\s0 (\s-1RTMPTE\s0) |
| | | is used for streaming multimedia content within \s-1HTTP\s0 requests to traverse |
| | | firewalls. |
| | | .SS "rtmpts" |
| | | .IX Subsection "rtmpts" |
| | | Real-Time Messaging Protocol tunneled through \s-1HTTPS\s0. |
| | | .PP |
| | | The Real-Time Messaging Protocol tunneled through \s-1HTTPS\s0 (\s-1RTMPTS\s0) is used |
| | | for streaming multimedia content within \s-1HTTPS\s0 requests to traverse |
| | | firewalls. |
| | | .SS "libsmbclient" |
| | | .IX Subsection "libsmbclient" |
| | | libsmbclient permits one to manipulate \s-1CIFS/SMB\s0 network resources. |
| | | .PP |
| | | Following syntax is required. |
| | | .PP |
| | | .Vb 1 |
| | | \& smb://[[domain:]user[:password@]]server[/share[/path[/file]]] |
| | | .Ve |
| | | .PP |
| | | This protocol accepts the following options. |
| | | .IP "\fBtimeout\fR" 4 |
| | | .IX Item "timeout" |
| | | Set timeout in milliseconds of socket I/O operations used by the underlying |
| | | low level operation. By default it is set to \-1, which means that the timeout |
| | | is not specified. |
| | | .IP "\fBtruncate\fR" 4 |
| | | .IX Item "truncate" |
| | | Truncate existing files on write, if set to 1. A value of 0 prevents |
| | | truncating. Default value is 1. |
| | | .IP "\fBworkgroup\fR" 4 |
| | | .IX Item "workgroup" |
| | | Set the workgroup used for making connections. By default workgroup is not specified. |
| | | .PP |
| | | For more information see: <\fBhttp://www.samba.org/\fR>. |
| | | .SS "libssh" |
| | | .IX Subsection "libssh" |
| | | Secure File Transfer Protocol via libssh |
| | | .PP |
| | | Read from or write to remote resources using \s-1SFTP\s0 protocol. |
| | | .PP |
| | | Following syntax is required. |
| | | .PP |
| | | .Vb 1 |
| | | \& sftp://[user[:password]@]server[:port]/path/to/remote/resource.mpeg |
| | | .Ve |
| | | .PP |
| | | This protocol accepts the following options. |
| | | .IP "\fBtimeout\fR" 4 |
| | | .IX Item "timeout" |
| | | Set timeout of socket I/O operations used by the underlying low level |
| | | operation. By default it is set to \-1, which means that the timeout |
| | | is not specified. |
| | | .IP "\fBtruncate\fR" 4 |
| | | .IX Item "truncate" |
| | | Truncate existing files on write, if set to 1. A value of 0 prevents |
| | | truncating. Default value is 1. |
| | | .IP "\fBprivate_key\fR" 4 |
| | | .IX Item "private_key" |
| | | Specify the path of the file containing private key to use during authorization. |
| | | By default libssh searches for keys in the \fI~/.ssh/\fR directory. |
| | | .PP |
| | | Example: Play a file stored on remote server. |
| | | .PP |
| | | .Vb 1 |
| | | \& ffplay sftp://user:password@server_address:22/home/user/resource.mpeg |
| | | .Ve |
| | | .SS "librtmp rtmp, rtmpe, rtmps, rtmpt, rtmpte" |
| | | .IX Subsection "librtmp rtmp, rtmpe, rtmps, rtmpt, rtmpte" |
| | | Real-Time Messaging Protocol and its variants supported through |
| | | librtmp. |
| | | .PP |
| | | Requires the presence of the librtmp headers and library during |
| | | configuration. You need to explicitly configure the build with |
| | | \&\*(L"\-\-enable\-librtmp\*(R". If enabled this will replace the native \s-1RTMP\s0 |
| | | protocol. |
| | | .PP |
| | | This protocol provides most client functions and a few server |
| | | functions needed to support \s-1RTMP\s0, \s-1RTMP\s0 tunneled in \s-1HTTP\s0 (\s-1RTMPT\s0), |
| | | encrypted \s-1RTMP\s0 (\s-1RTMPE\s0), \s-1RTMP\s0 over \s-1SSL/TLS\s0 (\s-1RTMPS\s0) and tunneled |
| | | variants of these encrypted types (\s-1RTMPTE\s0, \s-1RTMPTS\s0). |
| | | .PP |
| | | The required syntax is: |
| | | .PP |
| | | .Vb 1 |
| | | \& <rtmp_proto>://<server>[:<port>][/<app>][/<playpath>] <options> |
| | | .Ve |
| | | .PP |
| | | where \fIrtmp_proto\fR is one of the strings \*(L"rtmp\*(R", \*(L"rtmpt\*(R", \*(L"rtmpe\*(R", |
| | | \&\*(L"rtmps\*(R", \*(L"rtmpte\*(R", \*(L"rtmpts\*(R" corresponding to each \s-1RTMP\s0 variant, and |
| | | \&\fIserver\fR, \fIport\fR, \fIapp\fR and \fIplaypath\fR have the same |
| | | meaning as specified for the \s-1RTMP\s0 native protocol. |
| | | \&\fIoptions\fR contains a list of space-separated options of the form |
| | | \&\fIkey\fR=\fIval\fR. |
| | | .PP |
| | | See the librtmp manual page (man 3 librtmp) for more information. |
| | | .PP |
| | | For example, to stream a file in real-time to an \s-1RTMP\s0 server using |
| | | \&\fBffmpeg\fR: |
| | | .PP |
| | | .Vb 1 |
| | | \& ffmpeg \-re \-i myfile \-f flv rtmp://myserver/live/mystream |
| | | .Ve |
| | | .PP |
| | | To play the same stream using \fBffplay\fR: |
| | | .PP |
| | | .Vb 1 |
| | | \& ffplay "rtmp://myserver/live/mystream live=1" |
| | | .Ve |
| | | .SS "rtp" |
| | | .IX Subsection "rtp" |
| | | Real-time Transport Protocol. |
| | | .PP |
| | | The required syntax for an \s-1RTP\s0 \s-1URL\s0 is: |
| | | rtp://\fIhostname\fR[:\fIport\fR][?\fIoption\fR=\fIval\fR...] |
| | | .PP |
| | | \&\fIport\fR specifies the \s-1RTP\s0 port to use. |
| | | .PP |
| | | The following \s-1URL\s0 options are supported: |
| | | .IP "\fBttl=\fR\fIn\fR" 4 |
| | | .IX Item "ttl=n" |
| | | Set the \s-1TTL\s0 (Time-To-Live) value (for multicast only). |
| | | .IP "\fBrtcpport=\fR\fIn\fR" 4 |
| | | .IX Item "rtcpport=n" |
| | | Set the remote \s-1RTCP\s0 port to \fIn\fR. |
| | | .IP "\fBlocalrtpport=\fR\fIn\fR" 4 |
| | | .IX Item "localrtpport=n" |
| | | Set the local \s-1RTP\s0 port to \fIn\fR. |
| | | .IP "\fBlocalrtcpport=\fR\fIn\fR\fB'\fR" 4 |
| | | .IX Item "localrtcpport=n'" |
| | | Set the local \s-1RTCP\s0 port to \fIn\fR. |
| | | .IP "\fBpkt_size=\fR\fIn\fR" 4 |
| | | .IX Item "pkt_size=n" |
| | | Set max packet size (in bytes) to \fIn\fR. |
| | | .IP "\fBconnect=0|1\fR" 4 |
| | | .IX Item "connect=0|1" |
| | | Do a \f(CW\*(C`connect()\*(C'\fR on the \s-1UDP\s0 socket (if set to 1) or not (if set |
| | | to 0). |
| | | .IP "\fBsources=\fR\fIip\fR\fB[,\fR\fIip\fR\fB]\fR" 4 |
| | | .IX Item "sources=ip[,ip]" |
| | | List allowed source \s-1IP\s0 addresses. |
| | | .IP "\fBblock=\fR\fIip\fR\fB[,\fR\fIip\fR\fB]\fR" 4 |
| | | .IX Item "block=ip[,ip]" |
| | | List disallowed (blocked) source \s-1IP\s0 addresses. |
| | | .IP "\fBwrite_to_source=0|1\fR" 4 |
| | | .IX Item "write_to_source=0|1" |
| | | Send packets to the source address of the latest received packet (if |
| | | set to 1) or to a default remote address (if set to 0). |
| | | .IP "\fBlocalport=\fR\fIn\fR" 4 |
| | | .IX Item "localport=n" |
| | | Set the local \s-1RTP\s0 port to \fIn\fR. |
| | | .Sp |
| | | This is a deprecated option. Instead, \fBlocalrtpport\fR should be |
| | | used. |
| | | .PP |
| | | Important notes: |
| | | .IP "1." 4 |
| | | If \fBrtcpport\fR is not set the \s-1RTCP\s0 port will be set to the \s-1RTP\s0 |
| | | port value plus 1. |
| | | .IP "2." 4 |
| | | If \fBlocalrtpport\fR (the local \s-1RTP\s0 port) is not set any available |
| | | port will be used for the local \s-1RTP\s0 and \s-1RTCP\s0 ports. |
| | | .IP "3." 4 |
| | | If \fBlocalrtcpport\fR (the local \s-1RTCP\s0 port) is not set it will be |
| | | set to the local \s-1RTP\s0 port value plus 1. |
| | | .SS "rtsp" |
| | | .IX Subsection "rtsp" |
| | | Real-Time Streaming Protocol. |
| | | .PP |
| | | \&\s-1RTSP\s0 is not technically a protocol handler in libavformat, it is a demuxer |
| | | and muxer. The demuxer supports both normal \s-1RTSP\s0 (with data transferred |
| | | over \s-1RTP\s0; this is used by e.g. Apple and Microsoft) and Real-RTSP (with |
| | | data transferred over \s-1RDT\s0). |
| | | .PP |
| | | The muxer can be used to send a stream using \s-1RTSP\s0 \s-1ANNOUNCE\s0 to a server |
| | | supporting it (currently Darwin Streaming Server and Mischa Spiegelmock's |
| | | <\fBhttps://github.com/revmischa/rtsp\-server\fR>). |
| | | .PP |
| | | The required syntax for a \s-1RTSP\s0 url is: |
| | | .PP |
| | | .Vb 1 |
| | | \& rtsp://<hostname>[:<port>]/<path> |
| | | .Ve |
| | | .PP |
| | | Options can be set on the \fBffmpeg\fR/\fBffplay\fR command |
| | | line, or set in code via \f(CW\*(C`AVOption\*(C'\fRs or in |
| | | \&\f(CW\*(C`avformat_open_input\*(C'\fR. |
| | | .PP |
| | | The following options are supported. |
| | | .IP "\fBinitial_pause\fR" 4 |
| | | .IX Item "initial_pause" |
| | | Do not start playing the stream immediately if set to 1. Default value |
| | | is 0. |
| | | .IP "\fBrtsp_transport\fR" 4 |
| | | .IX Item "rtsp_transport" |
| | | Set \s-1RTSP\s0 transport protocols. |
| | | .Sp |
| | | It accepts the following values: |
| | | .RS 4 |
| | | .IP "\fBudp\fR" 4 |
| | | .IX Item "udp" |
| | | Use \s-1UDP\s0 as lower transport protocol. |
| | | .IP "\fBtcp\fR" 4 |
| | | .IX Item "tcp" |
| | | Use \s-1TCP\s0 (interleaving within the \s-1RTSP\s0 control channel) as lower |
| | | transport protocol. |
| | | .IP "\fBudp_multicast\fR" 4 |
| | | .IX Item "udp_multicast" |
| | | Use \s-1UDP\s0 multicast as lower transport protocol. |
| | | .IP "\fBhttp\fR" 4 |
| | | .IX Item "http" |
| | | Use \s-1HTTP\s0 tunneling as lower transport protocol, which is useful for |
| | | passing proxies. |
| | | .RE |
| | | .RS 4 |
| | | .Sp |
| | | Multiple lower transport protocols may be specified, in that case they are |
| | | tried one at a time (if the setup of one fails, the next one is tried). |
| | | For the muxer, only the \fBtcp\fR and \fBudp\fR options are supported. |
| | | .RE |
| | | .IP "\fBrtsp_flags\fR" 4 |
| | | .IX Item "rtsp_flags" |
| | | Set \s-1RTSP\s0 flags. |
| | | .Sp |
| | | The following values are accepted: |
| | | .RS 4 |
| | | .IP "\fBfilter_src\fR" 4 |
| | | .IX Item "filter_src" |
| | | Accept packets only from negotiated peer address and port. |
| | | .IP "\fBlisten\fR" 4 |
| | | .IX Item "listen" |
| | | Act as a server, listening for an incoming connection. |
| | | .IP "\fBprefer_tcp\fR" 4 |
| | | .IX Item "prefer_tcp" |
| | | Try \s-1TCP\s0 for \s-1RTP\s0 transport first, if \s-1TCP\s0 is available as \s-1RTSP\s0 \s-1RTP\s0 transport. |
| | | .RE |
| | | .RS 4 |
| | | .Sp |
| | | Default value is \fBnone\fR. |
| | | .RE |
| | | .IP "\fBallowed_media_types\fR" 4 |
| | | .IX Item "allowed_media_types" |
| | | Set media types to accept from the server. |
| | | .Sp |
| | | The following flags are accepted: |
| | | .RS 4 |
| | | .IP "\fBvideo\fR" 4 |
| | | .IX Item "video" |
| | | .PD 0 |
| | | .IP "\fBaudio\fR" 4 |
| | | .IX Item "audio" |
| | | .IP "\fBdata\fR" 4 |
| | | .IX Item "data" |
| | | .RE |
| | | .RS 4 |
| | | .PD |
| | | .Sp |
| | | By default it accepts all media types. |
| | | .RE |
| | | .IP "\fBmin_port\fR" 4 |
| | | .IX Item "min_port" |
| | | Set minimum local \s-1UDP\s0 port. Default value is 5000. |
| | | .IP "\fBmax_port\fR" 4 |
| | | .IX Item "max_port" |
| | | Set maximum local \s-1UDP\s0 port. Default value is 65000. |
| | | .IP "\fBtimeout\fR" 4 |
| | | .IX Item "timeout" |
| | | Set maximum timeout (in seconds) to wait for incoming connections. |
| | | .Sp |
| | | A value of \-1 means infinite (default). This option implies the |
| | | \&\fBrtsp_flags\fR set to \fBlisten\fR. |
| | | .IP "\fBreorder_queue_size\fR" 4 |
| | | .IX Item "reorder_queue_size" |
| | | Set number of packets to buffer for handling of reordered packets. |
| | | .IP "\fBstimeout\fR" 4 |
| | | .IX Item "stimeout" |
| | | Set socket \s-1TCP\s0 I/O timeout in microseconds. |
| | | .IP "\fBuser-agent\fR" 4 |
| | | .IX Item "user-agent" |
| | | Override User-Agent header. If not specified, it defaults to the |
| | | libavformat identifier string. |
| | | .PP |
| | | When receiving data over \s-1UDP\s0, the demuxer tries to reorder received packets |
| | | (since they may arrive out of order, or packets may get lost totally). This |
| | | can be disabled by setting the maximum demuxing delay to zero (via |
| | | the \f(CW\*(C`max_delay\*(C'\fR field of AVFormatContext). |
| | | .PP |
| | | When watching multi-bitrate Real-RTSP streams with \fBffplay\fR, the |
| | | streams to display can be chosen with \f(CW\*(C`\-vst\*(C'\fR \fIn\fR and |
| | | \&\f(CW\*(C`\-ast\*(C'\fR \fIn\fR for video and audio respectively, and can be switched |
| | | on the fly by pressing \f(CW\*(C`v\*(C'\fR and \f(CW\*(C`a\*(C'\fR. |
| | | .PP |
| | | \fIExamples\fR |
| | | .IX Subsection "Examples" |
| | | .PP |
| | | The following examples all make use of the \fBffplay\fR and |
| | | \&\fBffmpeg\fR tools. |
| | | .IP "\(bu" 4 |
| | | Watch a stream over \s-1UDP\s0, with a max reordering delay of 0.5 seconds: |
| | | .Sp |
| | | .Vb 1 |
| | | \& ffplay \-max_delay 500000 \-rtsp_transport udp rtsp://server/video.mp4 |
| | | .Ve |
| | | .IP "\(bu" 4 |
| | | Watch a stream tunneled over \s-1HTTP:\s0 |
| | | .Sp |
| | | .Vb 1 |
| | | \& ffplay \-rtsp_transport http rtsp://server/video.mp4 |
| | | .Ve |
| | | .IP "\(bu" 4 |
| | | Send a stream in realtime to a \s-1RTSP\s0 server, for others to watch: |
| | | .Sp |
| | | .Vb 1 |
| | | \& ffmpeg \-re \-i <input> \-f rtsp \-muxdelay 0.1 rtsp://server/live.sdp |
| | | .Ve |
| | | .IP "\(bu" 4 |
| | | Receive a stream in realtime: |
| | | .Sp |
| | | .Vb 1 |
| | | \& ffmpeg \-rtsp_flags listen \-i rtsp://ownaddress/live.sdp <output> |
| | | .Ve |
| | | .SS "sap" |
| | | .IX Subsection "sap" |
| | | Session Announcement Protocol (\s-1RFC\s0 2974). This is not technically a |
| | | protocol handler in libavformat, it is a muxer and demuxer. |
| | | It is used for signalling of \s-1RTP\s0 streams, by announcing the \s-1SDP\s0 for the |
| | | streams regularly on a separate port. |
| | | .PP |
| | | \fIMuxer\fR |
| | | .IX Subsection "Muxer" |
| | | .PP |
| | | The syntax for a \s-1SAP\s0 url given to the muxer is: |
| | | .PP |
| | | .Vb 1 |
| | | \& sap://<destination>[:<port>][?<options>] |
| | | .Ve |
| | | .PP |
| | | The \s-1RTP\s0 packets are sent to \fIdestination\fR on port \fIport\fR, |
| | | or to port 5004 if no port is specified. |
| | | \&\fIoptions\fR is a \f(CW\*(C`&\*(C'\fR\-separated list. The following options |
| | | are supported: |
| | | .IP "\fBannounce_addr=\fR\fIaddress\fR" 4 |
| | | .IX Item "announce_addr=address" |
| | | Specify the destination \s-1IP\s0 address for sending the announcements to. |
| | | If omitted, the announcements are sent to the commonly used \s-1SAP\s0 |
| | | announcement multicast address 224.2.127.254 (sap.mcast.net), or |
| | | ff0e::2:7ffe if \fIdestination\fR is an IPv6 address. |
| | | .IP "\fBannounce_port=\fR\fIport\fR" 4 |
| | | .IX Item "announce_port=port" |
| | | Specify the port to send the announcements on, defaults to |
| | | 9875 if not specified. |
| | | .IP "\fBttl=\fR\fIttl\fR" 4 |
| | | .IX Item "ttl=ttl" |
| | | Specify the time to live value for the announcements and \s-1RTP\s0 packets, |
| | | defaults to 255. |
| | | .IP "\fBsame_port=\fR\fI0|1\fR" 4 |
| | | .IX Item "same_port=0|1" |
| | | If set to 1, send all \s-1RTP\s0 streams on the same port pair. If zero (the |
| | | default), all streams are sent on unique ports, with each stream on a |
| | | port 2 numbers higher than the previous. |
| | | VLC/Live555 requires this to be set to 1, to be able to receive the stream. |
| | | The \s-1RTP\s0 stack in libavformat for receiving requires all streams to be sent |
| | | on unique ports. |
| | | .PP |
| | | Example command lines follow. |
| | | .PP |
| | | To broadcast a stream on the local subnet, for watching in \s-1VLC:\s0 |
| | | .PP |
| | | .Vb 1 |
| | | \& ffmpeg \-re \-i <input> \-f sap sap://224.0.0.255?same_port=1 |
| | | .Ve |
| | | .PP |
| | | Similarly, for watching in \fBffplay\fR: |
| | | .PP |
| | | .Vb 1 |
| | | \& ffmpeg \-re \-i <input> \-f sap sap://224.0.0.255 |
| | | .Ve |
| | | .PP |
| | | And for watching in \fBffplay\fR, over IPv6: |
| | | .PP |
| | | .Vb 1 |
| | | \& ffmpeg \-re \-i <input> \-f sap sap://[ff0e::1:2:3:4] |
| | | .Ve |
| | | .PP |
| | | \fIDemuxer\fR |
| | | .IX Subsection "Demuxer" |
| | | .PP |
| | | The syntax for a \s-1SAP\s0 url given to the demuxer is: |
| | | .PP |
| | | .Vb 1 |
| | | \& sap://[<address>][:<port>] |
| | | .Ve |
| | | .PP |
| | | \&\fIaddress\fR is the multicast address to listen for announcements on, |
| | | if omitted, the default 224.2.127.254 (sap.mcast.net) is used. \fIport\fR |
| | | is the port that is listened on, 9875 if omitted. |
| | | .PP |
| | | The demuxers listens for announcements on the given address and port. |
| | | Once an announcement is received, it tries to receive that particular stream. |
| | | .PP |
| | | Example command lines follow. |
| | | .PP |
| | | To play back the first stream announced on the normal \s-1SAP\s0 multicast address: |
| | | .PP |
| | | .Vb 1 |
| | | \& ffplay sap:// |
| | | .Ve |
| | | .PP |
| | | To play back the first stream announced on one the default IPv6 \s-1SAP\s0 multicast address: |
| | | .PP |
| | | .Vb 1 |
| | | \& ffplay sap://[ff0e::2:7ffe] |
| | | .Ve |
| | | .SS "sctp" |
| | | .IX Subsection "sctp" |
| | | Stream Control Transmission Protocol. |
| | | .PP |
| | | The accepted \s-1URL\s0 syntax is: |
| | | .PP |
| | | .Vb 1 |
| | | \& sctp://<host>:<port>[?<options>] |
| | | .Ve |
| | | .PP |
| | | The protocol accepts the following options: |
| | | .IP "\fBlisten\fR" 4 |
| | | .IX Item "listen" |
| | | If set to any value, listen for an incoming connection. Outgoing connection is done by default. |
| | | .IP "\fBmax_streams\fR" 4 |
| | | .IX Item "max_streams" |
| | | Set the maximum number of streams. By default no limit is set. |
| | | .SS "srt" |
| | | .IX Subsection "srt" |
| | | Haivision Secure Reliable Transport Protocol via libsrt. |
| | | .PP |
| | | The supported syntax for a \s-1SRT\s0 \s-1URL\s0 is: |
| | | .PP |
| | | .Vb 1 |
| | | \& srt://<hostname>:<port>[?<options>] |
| | | .Ve |
| | | .PP |
| | | \&\fIoptions\fR contains a list of &\-separated options of the form |
| | | \&\fIkey\fR=\fIval\fR. |
| | | .PP |
| | | or |
| | | .PP |
| | | .Vb 1 |
| | | \& <options> srt://<hostname>:<port> |
| | | .Ve |
| | | .PP |
| | | \&\fIoptions\fR contains a list of '\-\fIkey\fR \fIval\fR' |
| | | options. |
| | | .PP |
| | | This protocol accepts the following options. |
| | | .IP "\fBconnect_timeout\fR" 4 |
| | | .IX Item "connect_timeout" |
| | | Connection timeout; \s-1SRT\s0 cannot connect for \s-1RTT\s0 > 1500 msec |
| | | (2 handshake exchanges) with the default connect timeout of |
| | | 3 seconds. This option applies to the caller and rendezvous |
| | | connection modes. The connect timeout is 10 times the value |
| | | set for the rendezvous mode (which can be used as a |
| | | workaround for this connection problem with earlier versions). |
| | | .IP "\fBffs=\fR\fIbytes\fR" 4 |
| | | .IX Item "ffs=bytes" |
| | | Flight Flag Size (Window Size), in bytes. \s-1FFS\s0 is actually an |
| | | internal parameter and you should set it to not less than |
| | | \&\fBrecv_buffer_size\fR and \fBmss\fR. The default value |
| | | is relatively large, therefore unless you set a very large receiver buffer, |
| | | you do not need to change this option. Default value is 25600. |
| | | .IP "\fBinputbw=\fR\fIbytes/seconds\fR" 4 |
| | | .IX Item "inputbw=bytes/seconds" |
| | | Sender nominal input rate, in bytes per seconds. Used along with |
| | | \&\fBoheadbw\fR, when \fBmaxbw\fR is set to relative (0), to |
| | | calculate maximum sending rate when recovery packets are sent |
| | | along with the main media stream: |
| | | \&\fBinputbw\fR * (100 + \fBoheadbw\fR) / 100 |
| | | if \fBinputbw\fR is not set while \fBmaxbw\fR is set to |
| | | relative (0), the actual input rate is evaluated inside |
| | | the library. Default value is 0. |
| | | .IP "\fBiptos=\fR\fItos\fR" 4 |
| | | .IX Item "iptos=tos" |
| | | \&\s-1IP\s0 Type of Service. Applies to sender only. Default value is 0xB8. |
| | | .IP "\fBipttl=\fR\fIttl\fR" 4 |
| | | .IX Item "ipttl=ttl" |
| | | \&\s-1IP\s0 Time To Live. Applies to sender only. Default value is 64. |
| | | .IP "\fBlatency\fR" 4 |
| | | .IX Item "latency" |
| | | Timestamp-based Packet Delivery Delay. |
| | | Used to absorb bursts of missed packet retransmissions. |
| | | This flag sets both \fBrcvlatency\fR and \fBpeerlatency\fR |
| | | to the same value. Note that prior to version 1.3.0 |
| | | this is the only flag to set the latency, however |
| | | this is effectively equivalent to setting \fBpeerlatency\fR, |
| | | when side is sender and \fBrcvlatency\fR |
| | | when side is receiver, and the bidirectional stream |
| | | sending is not supported. |
| | | .IP "\fBlisten_timeout\fR" 4 |
| | | .IX Item "listen_timeout" |
| | | Set socket listen timeout. |
| | | .IP "\fBmaxbw=\fR\fIbytes/seconds\fR" 4 |
| | | .IX Item "maxbw=bytes/seconds" |
| | | Maximum sending bandwidth, in bytes per seconds. |
| | | \&\-1 infinite (\s-1CSRTCC\s0 limit is 30mbps) |
| | | 0 relative to input rate (see \fBinputbw\fR) |
| | | >0 absolute limit value |
| | | Default value is 0 (relative) |
| | | .IP "\fBmode=\fR\fIcaller|listener|rendezvous\fR" 4 |
| | | .IX Item "mode=caller|listener|rendezvous" |
| | | Connection mode. |
| | | \&\fBcaller\fR opens client connection. |
| | | \&\fBlistener\fR starts server to listen for incoming connections. |
| | | \&\fBrendezvous\fR use Rendez-Vous connection mode. |
| | | Default value is caller. |
| | | .IP "\fBmss=\fR\fIbytes\fR" 4 |
| | | .IX Item "mss=bytes" |
| | | Maximum Segment Size, in bytes. Used for buffer allocation |
| | | and rate calculation using a packet counter assuming fully |
| | | filled packets. The smallest \s-1MSS\s0 between the peers is |
| | | used. This is 1500 by default in the overall internet. |
| | | This is the maximum size of the \s-1UDP\s0 packet and can be |
| | | only decreased, unless you have some unusual dedicated |
| | | network settings. Default value is 1500. |
| | | .IP "\fBnakreport=\fR\fI1|0\fR" 4 |
| | | .IX Item "nakreport=1|0" |
| | | If set to 1, Receiver will send `UMSG_LOSSREPORT` messages |
| | | periodically until a lost packet is retransmitted or |
| | | intentionally dropped. Default value is 1. |
| | | .IP "\fBoheadbw=\fR\fIpercents\fR" 4 |
| | | .IX Item "oheadbw=percents" |
| | | Recovery bandwidth overhead above input rate, in percents. |
| | | See \fBinputbw\fR. Default value is 25%. |
| | | .IP "\fBpassphrase=\fR\fIstring\fR" 4 |
| | | .IX Item "passphrase=string" |
| | | HaiCrypt Encryption/Decryption Passphrase string, length |
| | | from 10 to 79 characters. The passphrase is the shared |
| | | secret between the sender and the receiver. It is used |
| | | to generate the Key Encrypting Key using \s-1PBKDF2\s0 |
| | | (Password-Based Key Derivation Function). It is used |
| | | only if \fBpbkeylen\fR is non-zero. It is used on |
| | | the receiver only if the received data is encrypted. |
| | | The configured passphrase cannot be recovered (write-only). |
| | | .IP "\fBpayload_size=\fR\fIbytes\fR" 4 |
| | | .IX Item "payload_size=bytes" |
| | | Sets the maximum declared size of a packet transferred |
| | | during the single call to the sending function in Live |
| | | mode. Use 0 if this value isn't used (which is default in |
| | | file mode). |
| | | Default is \-1 (automatic), which typically means MPEG-TS; |
| | | if you are going to use \s-1SRT\s0 |
| | | to send any different kind of payload, such as, for example, |
| | | wrapping a live stream in very small frames, then you can |
| | | use a bigger maximum frame size, though not greater than |
| | | 1456 bytes. |
| | | .IP "\fBpkt_size=\fR\fIbytes\fR" 4 |
| | | .IX Item "pkt_size=bytes" |
| | | Alias for \fBpayload_size\fR. |
| | | .IP "\fBpeerlatency\fR" 4 |
| | | .IX Item "peerlatency" |
| | | The latency value (as described in \fBrcvlatency\fR) that is |
| | | set by the sender side as a minimum value for the receiver. |
| | | .IP "\fBpbkeylen=\fR\fIbytes\fR" 4 |
| | | .IX Item "pbkeylen=bytes" |
| | | Sender encryption key length, in bytes. |
| | | Only can be set to 0, 16, 24 and 32. |
| | | Enable sender encryption if not 0. |
| | | Not required on receiver (set to 0), |
| | | key size obtained from sender in HaiCrypt handshake. |
| | | Default value is 0. |
| | | .IP "\fBrcvlatency\fR" 4 |
| | | .IX Item "rcvlatency" |
| | | The time that should elapse since the moment when the |
| | | packet was sent and the moment when it's delivered to |
| | | the receiver application in the receiving function. |
| | | This time should be a buffer time large enough to cover |
| | | the time spent for sending, unexpectedly extended \s-1RTT\s0 |
| | | time, and the time needed to retransmit the lost \s-1UDP\s0 |
| | | packet. The effective latency value will be the maximum |
| | | of this options' value and the value of \fBpeerlatency\fR |
| | | set by the peer side. Before version 1.3.0 this option |
| | | is only available as \fBlatency\fR. |
| | | .IP "\fBrecv_buffer_size=\fR\fIbytes\fR" 4 |
| | | .IX Item "recv_buffer_size=bytes" |
| | | Set \s-1UDP\s0 receive buffer size, expressed in bytes. |
| | | .IP "\fBsend_buffer_size=\fR\fIbytes\fR" 4 |
| | | .IX Item "send_buffer_size=bytes" |
| | | Set \s-1UDP\s0 send buffer size, expressed in bytes. |
| | | .IP "\fBrw_timeout\fR" 4 |
| | | .IX Item "rw_timeout" |
| | | Set raise error timeout for read/write optations. |
| | | .Sp |
| | | This option is only relevant in read mode: |
| | | if no data arrived in more than this time |
| | | interval, raise error. |
| | | .IP "\fBtlpktdrop=\fR\fI1|0\fR" 4 |
| | | .IX Item "tlpktdrop=1|0" |
| | | Too-late Packet Drop. When enabled on receiver, it skips |
| | | missing packets that have not been delivered in time and |
| | | delivers the following packets to the application when |
| | | their time-to-play has come. It also sends a fake \s-1ACK\s0 to |
| | | the sender. When enabled on sender and enabled on the |
| | | receiving peer, the sender drops the older packets that |
| | | have no chance of being delivered in time. It was |
| | | automatically enabled in the sender if the receiver |
| | | supports it. |
| | | .IP "\fBsndbuf=\fR\fIbytes\fR" 4 |
| | | .IX Item "sndbuf=bytes" |
| | | Set send buffer size, expressed in bytes. |
| | | .IP "\fBrcvbuf=\fR\fIbytes\fR" 4 |
| | | .IX Item "rcvbuf=bytes" |
| | | Set receive buffer size, expressed in bytes. |
| | | .Sp |
| | | Receive buffer must not be greater than \fBffs\fR. |
| | | .IP "\fBlossmaxttl=\fR\fIpackets\fR" 4 |
| | | .IX Item "lossmaxttl=packets" |
| | | The value up to which the Reorder Tolerance may grow. When |
| | | Reorder Tolerance is > 0, then packet loss report is delayed |
| | | until that number of packets come in. Reorder Tolerance |
| | | increases every time a \*(L"belated\*(R" packet has come, but it |
| | | wasn't due to retransmission (that is, when \s-1UDP\s0 packets tend |
| | | to come out of order), with the difference between the latest |
| | | sequence and this packet's sequence, and not more than the |
| | | value of this option. By default it's 0, which means that this |
| | | mechanism is turned off, and the loss report is always sent |
| | | immediately upon experiencing a \*(L"gap\*(R" in sequences. |
| | | .IP "\fBminversion\fR" 4 |
| | | .IX Item "minversion" |
| | | The minimum \s-1SRT\s0 version that is required from the peer. A connection |
| | | to a peer that does not satisfy the minimum version requirement |
| | | will be rejected. |
| | | .Sp |
| | | The version format in hex is 0xXXYYZZ for x.y.z in human readable |
| | | form. |
| | | .IP "\fBstreamid=\fR\fIstring\fR" 4 |
| | | .IX Item "streamid=string" |
| | | A string limited to 512 characters that can be set on the socket prior |
| | | to connecting. This stream \s-1ID\s0 will be able to be retrieved by the |
| | | listener side from the socket that is returned from srt_accept and |
| | | was connected by a socket with that set stream \s-1ID\s0. \s-1SRT\s0 does not enforce |
| | | any special interpretation of the contents of this string. |
| | | This option doesnXt make sense in Rendezvous connection; the result |
| | | might be that simply one side will override the value from the other |
| | | side and itXs the matter of luck which one would win |
| | | .IP "\fBsmoother=\fR\fIlive|file\fR" 4 |
| | | .IX Item "smoother=live|file" |
| | | The type of Smoother used for the transmission for that socket, which |
| | | is responsible for the transmission and congestion control. The Smoother |
| | | type must be exactly the same on both connecting parties, otherwise |
| | | the connection is rejected. |
| | | .IP "\fBmessageapi=\fR\fI1|0\fR" 4 |
| | | .IX Item "messageapi=1|0" |
| | | When set, this socket uses the Message \s-1API\s0, otherwise it uses Buffer |
| | | \&\s-1API\s0. Note that in live mode (see \fBtranstype\fR) thereXs only |
| | | message \s-1API\s0 available. In File mode you can chose to use one of two modes: |
| | | .Sp |
| | | Stream \s-1API\s0 (default, when this option is false). In this mode you may |
| | | send as many data as you wish with one sending instruction, or even use |
| | | dedicated functions that read directly from a file. The internal facility |
| | | will take care of any speed and congestion control. When receiving, you |
| | | can also receive as many data as desired, the data not extracted will be |
| | | waiting for the next call. There is no boundary between data portions in |
| | | the Stream mode. |
| | | .Sp |
| | | Message \s-1API\s0. In this mode your single sending instruction passes exactly |
| | | one piece of data that has boundaries (a message). Contrary to Live mode, |
| | | this message may span across multiple \s-1UDP\s0 packets and the only size |
| | | limitation is that it shall fit as a whole in the sending buffer. The |
| | | receiver shall use as large buffer as necessary to receive the message, |
| | | otherwise the message will not be given up. When the message is not |
| | | complete (not all packets received or there was a packet loss) it will |
| | | not be given up. |
| | | .IP "\fBtranstype=\fR\fIlive|file\fR" 4 |
| | | .IX Item "transtype=live|file" |
| | | Sets the transmission type for the socket, in particular, setting this |
| | | option sets multiple other parameters to their default values as required |
| | | for a particular transmission type. |
| | | .Sp |
| | | live: Set options as for live transmission. In this mode, you should |
| | | send by one sending instruction only so many data that fit in one \s-1UDP\s0 packet, |
| | | and limited to the value defined first in \fBpayload_size\fR (1316 is |
| | | default in this mode). There is no speed control in this mode, only the |
| | | bandwidth control, if configured, in order to not exceed the bandwidth with |
| | | the overhead transmission (retransmitted and control packets). |
| | | .Sp |
| | | file: Set options as for non-live transmission. See \fBmessageapi\fR |
| | | for further explanations |
| | | .PP |
| | | For more information see: <\fBhttps://github.com/Haivision/srt\fR>. |
| | | .SS "srtp" |
| | | .IX Subsection "srtp" |
| | | Secure Real-time Transport Protocol. |
| | | .PP |
| | | The accepted options are: |
| | | .IP "\fBsrtp_in_suite\fR" 4 |
| | | .IX Item "srtp_in_suite" |
| | | .PD 0 |
| | | .IP "\fBsrtp_out_suite\fR" 4 |
| | | .IX Item "srtp_out_suite" |
| | | .PD |
| | | Select input and output encoding suites. |
| | | .Sp |
| | | Supported values: |
| | | .RS 4 |
| | | .IP "\fB\s-1AES_CM_128_HMAC_SHA1_80\s0\fR" 4 |
| | | .IX Item "AES_CM_128_HMAC_SHA1_80" |
| | | .PD 0 |
| | | .IP "\fB\s-1SRTP_AES128_CM_HMAC_SHA1_80\s0\fR" 4 |
| | | .IX Item "SRTP_AES128_CM_HMAC_SHA1_80" |
| | | .IP "\fB\s-1AES_CM_128_HMAC_SHA1_32\s0\fR" 4 |
| | | .IX Item "AES_CM_128_HMAC_SHA1_32" |
| | | .IP "\fB\s-1SRTP_AES128_CM_HMAC_SHA1_32\s0\fR" 4 |
| | | .IX Item "SRTP_AES128_CM_HMAC_SHA1_32" |
| | | .RE |
| | | .RS 4 |
| | | .RE |
| | | .IP "\fBsrtp_in_params\fR" 4 |
| | | .IX Item "srtp_in_params" |
| | | .IP "\fBsrtp_out_params\fR" 4 |
| | | .IX Item "srtp_out_params" |
| | | .PD |
| | | Set input and output encoding parameters, which are expressed by a |
| | | base64\-encoded representation of a binary block. The first 16 bytes of |
| | | this binary block are used as master key, the following 14 bytes are |
| | | used as master salt. |
| | | .SS "subfile" |
| | | .IX Subsection "subfile" |
| | | Virtually extract a segment of a file or another stream. |
| | | The underlying stream must be seekable. |
| | | .PP |
| | | Accepted options: |
| | | .IP "\fBstart\fR" 4 |
| | | .IX Item "start" |
| | | Start offset of the extracted segment, in bytes. |
| | | .IP "\fBend\fR" 4 |
| | | .IX Item "end" |
| | | End offset of the extracted segment, in bytes. |
| | | If set to 0, extract till end of file. |
| | | .PP |
| | | Examples: |
| | | .PP |
| | | Extract a chapter from a \s-1DVD\s0 \s-1VOB\s0 file (start and end sectors obtained |
| | | externally and multiplied by 2048): |
| | | .PP |
| | | .Vb 1 |
| | | \& subfile,,start,153391104,end,268142592,,:/media/dvd/VIDEO_TS/VTS_08_1.VOB |
| | | .Ve |
| | | .PP |
| | | Play an \s-1AVI\s0 file directly from a \s-1TAR\s0 archive: |
| | | .PP |
| | | .Vb 1 |
| | | \& subfile,,start,183241728,end,366490624,,:archive.tar |
| | | .Ve |
| | | .PP |
| | | Play a MPEG-TS file from start offset till end: |
| | | .PP |
| | | .Vb 1 |
| | | \& subfile,,start,32815239,end,0,,:video.ts |
| | | .Ve |
| | | .SS "tee" |
| | | .IX Subsection "tee" |
| | | Writes the output to multiple protocols. The individual outputs are separated |
| | | by | |
| | | .PP |
| | | .Vb 1 |
| | | \& tee:file://path/to/local/this.avi|file://path/to/local/that.avi |
| | | .Ve |
| | | .SS "tcp" |
| | | .IX Subsection "tcp" |
| | | Transmission Control Protocol. |
| | | .PP |
| | | The required syntax for a \s-1TCP\s0 url is: |
| | | .PP |
| | | .Vb 1 |
| | | \& tcp://<hostname>:<port>[?<options>] |
| | | .Ve |
| | | .PP |
| | | \&\fIoptions\fR contains a list of &\-separated options of the form |
| | | \&\fIkey\fR=\fIval\fR. |
| | | .PP |
| | | The list of supported options follows. |
| | | .IP "\fBlisten=\fR\fI1|0\fR" 4 |
| | | .IX Item "listen=1|0" |
| | | Listen for an incoming connection. Default value is 0. |
| | | .IP "\fBtimeout=\fR\fImicroseconds\fR" 4 |
| | | .IX Item "timeout=microseconds" |
| | | Set raise error timeout, expressed in microseconds. |
| | | .Sp |
| | | This option is only relevant in read mode: if no data arrived in more |
| | | than this time interval, raise error. |
| | | .IP "\fBlisten_timeout=\fR\fImilliseconds\fR" 4 |
| | | .IX Item "listen_timeout=milliseconds" |
| | | Set listen timeout, expressed in milliseconds. |
| | | .IP "\fBrecv_buffer_size=\fR\fIbytes\fR" 4 |
| | | .IX Item "recv_buffer_size=bytes" |
| | | Set receive buffer size, expressed bytes. |
| | | .IP "\fBsend_buffer_size=\fR\fIbytes\fR" 4 |
| | | .IX Item "send_buffer_size=bytes" |
| | | Set send buffer size, expressed bytes. |
| | | .IP "\fBtcp_nodelay=\fR\fI1|0\fR" 4 |
| | | .IX Item "tcp_nodelay=1|0" |
| | | Set \s-1TCP_NODELAY\s0 to disable Nagle's algorithm. Default value is 0. |
| | | .IP "\fBtcp_mss=\fR\fIbytes\fR" 4 |
| | | .IX Item "tcp_mss=bytes" |
| | | Set maximum segment size for outgoing \s-1TCP\s0 packets, expressed in bytes. |
| | | .PP |
| | | The following example shows how to setup a listening \s-1TCP\s0 connection |
| | | with \fBffmpeg\fR, which is then accessed with \fBffplay\fR: |
| | | .PP |
| | | .Vb 2 |
| | | \& ffmpeg \-i <input> \-f <format> tcp://<hostname>:<port>?listen |
| | | \& ffplay tcp://<hostname>:<port> |
| | | .Ve |
| | | .SS "tls" |
| | | .IX Subsection "tls" |
| | | Transport Layer Security (\s-1TLS\s0) / Secure Sockets Layer (\s-1SSL\s0) |
| | | .PP |
| | | The required syntax for a \s-1TLS/SSL\s0 url is: |
| | | .PP |
| | | .Vb 1 |
| | | \& tls://<hostname>:<port>[?<options>] |
| | | .Ve |
| | | .PP |
| | | The following parameters can be set via command line options |
| | | (or in code via \f(CW\*(C`AVOption\*(C'\fRs): |
| | | .IP "\fBca_file, cafile=\fR\fIfilename\fR" 4 |
| | | .IX Item "ca_file, cafile=filename" |
| | | A file containing certificate authority (\s-1CA\s0) root certificates to treat |
| | | as trusted. If the linked \s-1TLS\s0 library contains a default this might not |
| | | need to be specified for verification to work, but not all libraries and |
| | | setups have defaults built in. |
| | | The file must be in OpenSSL \s-1PEM\s0 format. |
| | | .IP "\fBtls_verify=\fR\fI1|0\fR" 4 |
| | | .IX Item "tls_verify=1|0" |
| | | If enabled, try to verify the peer that we are communicating with. |
| | | Note, if using OpenSSL, this currently only makes sure that the |
| | | peer certificate is signed by one of the root certificates in the \s-1CA\s0 |
| | | database, but it does not validate that the certificate actually |
| | | matches the host name we are trying to connect to. (With other backends, |
| | | the host name is validated as well.) |
| | | .Sp |
| | | This is disabled by default since it requires a \s-1CA\s0 database to be |
| | | provided by the caller in many cases. |
| | | .IP "\fBcert_file, cert=\fR\fIfilename\fR" 4 |
| | | .IX Item "cert_file, cert=filename" |
| | | A file containing a certificate to use in the handshake with the peer. |
| | | (When operating as server, in listen mode, this is more often required |
| | | by the peer, while client certificates only are mandated in certain |
| | | setups.) |
| | | .IP "\fBkey_file, key=\fR\fIfilename\fR" 4 |
| | | .IX Item "key_file, key=filename" |
| | | A file containing the private key for the certificate. |
| | | .IP "\fBlisten=\fR\fI1|0\fR" 4 |
| | | .IX Item "listen=1|0" |
| | | If enabled, listen for connections on the provided port, and assume |
| | | the server role in the handshake instead of the client role. |
| | | .PP |
| | | Example command lines: |
| | | .PP |
| | | To create a \s-1TLS/SSL\s0 server that serves an input stream. |
| | | .PP |
| | | .Vb 1 |
| | | \& ffmpeg \-i <input> \-f <format> tls://<hostname>:<port>?listen&cert=<server.crt>&key=<server.key> |
| | | .Ve |
| | | .PP |
| | | To play back a stream from the \s-1TLS/SSL\s0 server using \fBffplay\fR: |
| | | .PP |
| | | .Vb 1 |
| | | \& ffplay tls://<hostname>:<port> |
| | | .Ve |
| | | .SS "udp" |
| | | .IX Subsection "udp" |
| | | User Datagram Protocol. |
| | | .PP |
| | | The required syntax for an \s-1UDP\s0 \s-1URL\s0 is: |
| | | .PP |
| | | .Vb 1 |
| | | \& udp://<hostname>:<port>[?<options>] |
| | | .Ve |
| | | .PP |
| | | \&\fIoptions\fR contains a list of &\-separated options of the form \fIkey\fR=\fIval\fR. |
| | | .PP |
| | | In case threading is enabled on the system, a circular buffer is used |
| | | to store the incoming data, which allows one to reduce loss of data due to |
| | | \&\s-1UDP\s0 socket buffer overruns. The \fIfifo_size\fR and |
| | | \&\fIoverrun_nonfatal\fR options are related to this buffer. |
| | | .PP |
| | | The list of supported options follows. |
| | | .IP "\fBbuffer_size=\fR\fIsize\fR" 4 |
| | | .IX Item "buffer_size=size" |
| | | Set the \s-1UDP\s0 maximum socket buffer size in bytes. This is used to set either |
| | | the receive or send buffer size, depending on what the socket is used for. |
| | | Default is 64KB. See also \fIfifo_size\fR. |
| | | .IP "\fBbitrate=\fR\fIbitrate\fR" 4 |
| | | .IX Item "bitrate=bitrate" |
| | | If set to nonzero, the output will have the specified constant bitrate if the |
| | | input has enough packets to sustain it. |
| | | .IP "\fBburst_bits=\fR\fIbits\fR" 4 |
| | | .IX Item "burst_bits=bits" |
| | | When using \fIbitrate\fR this specifies the maximum number of bits in |
| | | packet bursts. |
| | | .IP "\fBlocalport=\fR\fIport\fR" 4 |
| | | .IX Item "localport=port" |
| | | Override the local \s-1UDP\s0 port to bind with. |
| | | .IP "\fBlocaladdr=\fR\fIaddr\fR" 4 |
| | | .IX Item "localaddr=addr" |
| | | Local \s-1IP\s0 address of a network interface used for sending packets or joining |
| | | multicast groups. |
| | | .IP "\fBpkt_size=\fR\fIsize\fR" 4 |
| | | .IX Item "pkt_size=size" |
| | | Set the size in bytes of \s-1UDP\s0 packets. |
| | | .IP "\fBreuse=\fR\fI1|0\fR" 4 |
| | | .IX Item "reuse=1|0" |
| | | Explicitly allow or disallow reusing \s-1UDP\s0 sockets. |
| | | .IP "\fBttl=\fR\fIttl\fR" 4 |
| | | .IX Item "ttl=ttl" |
| | | Set the time to live value (for multicast only). |
| | | .IP "\fBconnect=\fR\fI1|0\fR" 4 |
| | | .IX Item "connect=1|0" |
| | | Initialize the \s-1UDP\s0 socket with \f(CW\*(C`connect()\*(C'\fR. In this case, the |
| | | destination address can't be changed with ff_udp_set_remote_url later. |
| | | If the destination address isn't known at the start, this option can |
| | | be specified in ff_udp_set_remote_url, too. |
| | | This allows finding out the source address for the packets with getsockname, |
| | | and makes writes return with \s-1AVERROR\s0(\s-1ECONNREFUSED\s0) if \*(L"destination |
| | | unreachable\*(R" is received. |
| | | For receiving, this gives the benefit of only receiving packets from |
| | | the specified peer address/port. |
| | | .IP "\fBsources=\fR\fIaddress\fR\fB[,\fR\fIaddress\fR\fB]\fR" 4 |
| | | .IX Item "sources=address[,address]" |
| | | Only receive packets sent from the specified addresses. In case of multicast, |
| | | also subscribe to multicast traffic coming from these addresses only. |
| | | .IP "\fBblock=\fR\fIaddress\fR\fB[,\fR\fIaddress\fR\fB]\fR" 4 |
| | | .IX Item "block=address[,address]" |
| | | Ignore packets sent from the specified addresses. In case of multicast, also |
| | | exclude the source addresses in the multicast subscription. |
| | | .IP "\fBfifo_size=\fR\fIunits\fR" 4 |
| | | .IX Item "fifo_size=units" |
| | | Set the \s-1UDP\s0 receiving circular buffer size, expressed as a number of |
| | | packets with size of 188 bytes. If not specified defaults to 7*4096. |
| | | .IP "\fBoverrun_nonfatal=\fR\fI1|0\fR" 4 |
| | | .IX Item "overrun_nonfatal=1|0" |
| | | Survive in case of \s-1UDP\s0 receiving circular buffer overrun. Default |
| | | value is 0. |
| | | .IP "\fBtimeout=\fR\fImicroseconds\fR" 4 |
| | | .IX Item "timeout=microseconds" |
| | | Set raise error timeout, expressed in microseconds. |
| | | .Sp |
| | | This option is only relevant in read mode: if no data arrived in more |
| | | than this time interval, raise error. |
| | | .IP "\fBbroadcast=\fR\fI1|0\fR" 4 |
| | | .IX Item "broadcast=1|0" |
| | | Explicitly allow or disallow \s-1UDP\s0 broadcasting. |
| | | .Sp |
| | | Note that broadcasting may not work properly on networks having |
| | | a broadcast storm protection. |
| | | .PP |
| | | \fIExamples\fR |
| | | .IX Subsection "Examples" |
| | | .IP "\(bu" 4 |
| | | Use \fBffmpeg\fR to stream over \s-1UDP\s0 to a remote endpoint: |
| | | .Sp |
| | | .Vb 1 |
| | | \& ffmpeg \-i <input> \-f <format> udp://<hostname>:<port> |
| | | .Ve |
| | | .IP "\(bu" 4 |
| | | Use \fBffmpeg\fR to stream in mpegts format over \s-1UDP\s0 using 188 |
| | | sized \s-1UDP\s0 packets, using a large input buffer: |
| | | .Sp |
| | | .Vb 1 |
| | | \& ffmpeg \-i <input> \-f mpegts udp://<hostname>:<port>?pkt_size=188&buffer_size=65535 |
| | | .Ve |
| | | .IP "\(bu" 4 |
| | | Use \fBffmpeg\fR to receive over \s-1UDP\s0 from a remote endpoint: |
| | | .Sp |
| | | .Vb 1 |
| | | \& ffmpeg \-i udp://[<multicast\-address>]:<port> ... |
| | | .Ve |
| | | .SS "unix" |
| | | .IX Subsection "unix" |
| | | Unix local socket |
| | | .PP |
| | | The required syntax for a Unix socket \s-1URL\s0 is: |
| | | .PP |
| | | .Vb 1 |
| | | \& unix://<filepath> |
| | | .Ve |
| | | .PP |
| | | The following parameters can be set via command line options |
| | | (or in code via \f(CW\*(C`AVOption\*(C'\fRs): |
| | | .IP "\fBtimeout\fR" 4 |
| | | .IX Item "timeout" |
| | | Timeout in ms. |
| | | .IP "\fBlisten\fR" 4 |
| | | .IX Item "listen" |
| | | Create the Unix socket in listening mode. |
| | | .SH "SEE ALSO" |
| | | .IX Header "SEE ALSO" |
| | | \&\fIffmpeg\fR\|(1), \fIffplay\fR\|(1), \fIffprobe\fR\|(1), \fIlibavformat\fR\|(3) |
| | | .SH "AUTHORS" |
| | | .IX Header "AUTHORS" |
| | | The FFmpeg developers. |
| | | .PP |
| | | For details about the authorship, see the Git history of the project |
| | | (git://source.ffmpeg.org/ffmpeg), e.g. by typing the command |
| | | \&\fBgit log\fR in the FFmpeg source directory, or browsing the |
| | | online repository at <\fBhttp://source.ffmpeg.org\fR>. |
| | | .PP |
| | | Maintainers for the specific components are listed in the file |
| | | \&\fI\s-1MAINTAINERS\s0\fR in the source code tree. |