| | |
| | | ,record_(false) |
| | | ,fps_(0.0f) |
| | | ,format_name_("mp4") |
| | | ,in_v_stream_(NULL) |
| | | ,in_a_stream_(NULL) |
| | | {} |
| | | |
| | | FormatOut::~FormatOut() |
| | | { |
| | | clear(); |
| | | |
| | | } |
| | | |
| | | void FormatOut::clear(){ |
| | |
| | | return true; |
| | | } |
| | | |
| | | bool FormatOut::copyCodecFromIn(AVFormatContext* in){ |
| | | |
| | | for(int i = 0; i < in->nb_streams; i++) |
| | | { //根据输入流创建输出流 |
| | | AVStream *in_stream = in->streams[i]; |
| | | AVStream *out_stream = avformat_new_stream(ctx_, in_stream->codec->codec); |
| | | if(!out_stream) |
| | | { |
| | | logIt("Failed allocating output stream.\n"); |
| | | return false; |
| | | } |
| | | |
| | | //将输出流的编码信息复制到输入流 |
| | | auto ret = avcodec_copy_context(out_stream->codec, in_stream->codec); |
| | | if(ret<0) |
| | | { |
| | | logIt("Failed to copy context from input to output stream codec context\n"); |
| | | return false; |
| | | } |
| | | |
| | | if (in_stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO){ |
| | | v_idx_ = i; |
| | | }else{ |
| | | a_idx_ = i; |
| | | } |
| | | |
| | | out_stream->codecpar->codec_tag = out_stream->codec->codec_tag = 0; |
| | | |
| | | if(ctx_->oformat->flags & AVFMT_GLOBALHEADER) |
| | | out_stream->codec->flags |= AV_CODEC_FLAG_GLOBAL_HEADER; |
| | | |
| | | bool FormatOut::addStream(AVStream *s){ |
| | | AVStream *in_stream = s; |
| | | |
| | | AVStream *out_stream = avformat_new_stream(ctx_, in_stream->codec->codec); |
| | | if(!out_stream) |
| | | { |
| | | logIt("Failed allocating output stream.\n"); |
| | | return false; |
| | | } |
| | | |
| | | in_ctx_ = in; |
| | | |
| | | //将输出流的编码信息复制到输入流 |
| | | auto ret = avcodec_parameters_copy(out_stream->codecpar, in_stream->codecpar); |
| | | if(ret<0) |
| | | { |
| | | logIt("Failed to copy context from input to output stream codec context\n"); |
| | | return false; |
| | | } |
| | | out_stream->codecpar->codec_tag = 0; |
| | | |
| | | if(ctx_->oformat->flags & AVFMT_GLOBALHEADER) |
| | | out_stream->codec->flags |= AV_CODEC_FLAG_GLOBAL_HEADER; |
| | | |
| | | return true; |
| | | } |
| | | |
| | | bool FormatOut::JustWriter(AVFormatContext *in, const char *filename){ |
| | | bool FormatOut::copyCodecFromIn(AVStream *v, AVStream *a){ |
| | | if (v){ |
| | | v_idx_ = 0; |
| | | in_v_stream_ = v; |
| | | |
| | | if (!addStream(v)){ |
| | | logIt("format out add video stream error"); |
| | | return false; |
| | | }else{ |
| | | logIt("copy video from instream"); |
| | | } |
| | | } |
| | | if (a){ |
| | | a_idx_ = 1; |
| | | in_a_stream_ = a; |
| | | if (!addStream(a)){ |
| | | logIt("format out add audio stream error"); |
| | | return false; |
| | | }else{ |
| | | logIt("copy audio from instream"); |
| | | } |
| | | } |
| | | return true; |
| | | } |
| | | |
| | | bool FormatOut::JustWriter(AVStream *v, AVStream *a, const char *filename){ |
| | | if(ctx_){ |
| | | clear(); |
| | | } |
| | | |
| | | bool flag = open(NULL, format_name_.c_str()); |
| | | |
| | | flag = copyCodecFromIn(in) && flag; |
| | | flag = copyCodecFromIn(v, a) && flag; |
| | | if(!flag){ |
| | | logIt("FormatOut JustWriter error from in"); |
| | | return false; |
| | |
| | | av_dict_set(&avdic,option_key,option_value,0); |
| | | flag = writeHeader(&avdic); |
| | | av_dict_free(&avdic); |
| | | |
| | | } |
| | | |
| | | |
| | | return flag; |
| | | } |
| | | |
| | |
| | | } |
| | | |
| | | void FormatOut::adjustPTS(AVPacket *pkt, const int64_t &frame_cnt){ |
| | | if (pkt->stream_index >= ctx_->nb_streams){ |
| | | logIt("adjustPTS pkt stream index too much"); |
| | | return; |
| | | } |
| | | |
| | | AVStream *in_stream,*out_stream; |
| | | |
| | | in_stream = in_ctx_->streams[pkt->stream_index]; |
| | | out_stream = ctx_->streams[pkt->stream_index]; |
| | | |
| | | // logIt("BEFORE stream %d, pts: %lld, dts: %lld, duration: %lld", |
| | | // pkt->stream_index, pkt->pts, pkt->dts, pkt->duration); |
| | | int out_idx = -1; |
| | | std::vector<AVStream*> in_streams{in_v_stream_, in_a_stream_}; |
| | | for (auto i : in_streams){ |
| | | if (i && (i->index == pkt->stream_index)){ |
| | | if (i->codecpar->codec_type == AVMEDIA_TYPE_VIDEO){ |
| | | out_idx = v_idx_; |
| | | in_stream = i; |
| | | break; |
| | | }else if (i->codecpar->codec_type == AVMEDIA_TYPE_AUDIO){ |
| | | in_stream = i; |
| | | out_idx = a_idx_; |
| | | break; |
| | | } |
| | | } |
| | | } |
| | | if (out_idx == -1) return; |
| | | out_stream = ctx_->streams[out_idx]; |
| | | pkt->stream_index = out_idx; |
| | | |
| | | //转换 PTS/DTS 时序 |
| | | pkt->pts = av_rescale_q_rnd(pkt->pts,in_stream->time_base,out_stream->time_base,(enum AVRounding)(AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX)); |
| | | pkt->dts = av_rescale_q_rnd(pkt->dts, in_stream->time_base, out_stream->time_base, (enum AVRounding)(AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX)); |
| | | pkt->duration = av_rescale_q(pkt->duration, in_stream->time_base, out_stream->time_base); |
| | | pkt->pos = -1; |
| | | int64_t time_stamp = frame_cnt; |
| | | |
| | | // logIt("AFTER stream %d, pts: %lld, dts: %lld, duration: %lld", |
| | | // pkt->stream_index, pkt->pts, pkt->dts, pkt->duration); |
| | | if (out_idx == v_idx_){ |
| | | |
| | | pkt->pos = -1; |
| | | AVRational time_base = ctx_->streams[out_idx]->time_base; |
| | | |
| | | AVRational time_base_q = { 1, AV_TIME_BASE }; |
| | | int64_t calc_duration = (int64_t)(AV_TIME_BASE / fps_); //内部时间戳 |
| | | pkt->pts = av_rescale_q(time_stamp*calc_duration, time_base_q, time_base); |
| | | pkt->dts = pkt->pts; |
| | | pkt->duration = av_rescale_q(calc_duration, time_base_q, time_base); |
| | | |
| | | }else if (out_idx == a_idx_){ |
| | | |
| | | pkt->duration = 1024; |
| | | pkt->pts = pkt->dts = pkt->duration * time_stamp; |
| | | |
| | | } |
| | | // logIt("BEFORE in stream timebase %d:%d, out timebase %d:%d, |
| | | // pts: %lld, dts: %lld, duration: %lld", |
| | | // in_stream->time_base.num, in_stream->time_base.den, |
| | | // out_stream->time_base.num, out_stream->time_base.den, |
| | | // pkt->pts, pkt->dts, pkt->duration); |
| | | |
| | | } |
| | | |
| | | bool FormatOut::writeFrame(AVPacket *pkt, const int64_t &frame_cnt, |
| | | bool interleaved/* = true*/){ |
| | | |
| | | adjustPTS(pkt, frame_cnt); |
| | | auto ret = writeFrame2(pkt, interleaved); |
| | | auto ret = writeFrameInternal(pkt, interleaved); |
| | | if (!ret){ |
| | | logIt("write to file failed, pkt.pts: %lld, dts: %lld, frame count: %d", |
| | | pkt->pts, pkt->dts, frame_cnt); |
| | |
| | | return ret; |
| | | } |
| | | |
| | | bool FormatOut::writeFrame2(AVPacket *pkt, bool interleaved){ |
| | | |
| | | static bool write_frame(AVFormatContext *ctx, AVPacket *pkt, bool interleaved){ |
| | | int ret = 0; |
| | | if(interleaved){ |
| | | ret = av_interleaved_write_frame(ctx_, pkt); |
| | | ret = av_interleaved_write_frame(ctx, pkt); |
| | | }else{ |
| | | // returns 1 if flushed and there is no more data to flush |
| | | ret = av_write_frame(ctx_, pkt); |
| | | ret = av_write_frame(ctx, pkt); |
| | | } |
| | | |
| | | |
| | | if(ret < -22 || ret == 0){ |
| | | return true; |
| | | } |
| | |
| | | return false; |
| | | } |
| | | |
| | | bool FormatOut::writeFrameInternal(AVPacket *pkt, bool interleaved){ |
| | | |
| | | return write_frame(ctx_, pkt, interleaved); |
| | | } |
| | | |
| | | bool FormatOut::writeTrailer(){ |
| | | const int ret = av_write_trailer(ctx_); |
| | | if(ret != 0) |