| | |
| | | ,record_(false) |
| | | ,fps_(0.0f) |
| | | ,format_name_("mp4") |
| | | ,streams_(NULL) |
| | | {} |
| | | |
| | | FormatOut::~FormatOut() |
| | |
| | | } |
| | | |
| | | ////////////////////////////////////////////////////////////////////////// |
| | | FormatOut::FormatOut(AVStream *in, const char *format_name) |
| | | FormatOut::FormatOut(const double fps, const char *format_name) |
| | | :FormatOut(){ |
| | | |
| | | format_name_ = format_name; |
| | | |
| | | if(in->r_frame_rate.num >=1 && in->r_frame_rate.den >= 1){ |
| | | fps_ = av_q2d(in->r_frame_rate); |
| | | }else if(in->avg_frame_rate.num >=1 && in->avg_frame_rate.den >= 1){ |
| | | fps_ = av_q2d(in->avg_frame_rate); |
| | | } |
| | | } |
| | | |
| | | |
| | | bool FormatOut::copyCodecFromIn(AVStream *in){ |
| | | |
| | | v_s_ = avformat_new_stream(ctx_, in->codec->codec); |
| | | if(!v_s_){ |
| | | return false; |
| | | } |
| | | |
| | | int ret = avcodec_copy_context(v_s_->codec, in->codec); |
| | | if (ret < 0){ |
| | | logIt("can't copy codec from in error:%s", getAVErrorDesc(ret).c_str()); |
| | | |
| | | return false; |
| | | } |
| | | |
| | | if (ctx_->oformat->flags & AVFMT_GLOBALHEADER) |
| | | { |
| | | v_s_->codec->flags |= AV_CODEC_FLAG_GLOBAL_HEADER; |
| | | } |
| | | return true; |
| | | fps_ = fps; |
| | | } |
| | | |
| | | bool FormatOut::openResource(const char *filename, const int flags){ |
| | | if((ctx_->flags & AVFMT_NOFILE) != AVFMT_NOFILE){ |
| | | if((ctx_->oformat->flags & AVFMT_NOFILE) != AVFMT_NOFILE){ |
| | | |
| | | const int err = avio_open2(&ctx_->pb, filename, flags, NULL, NULL); |
| | | if(err < 0) |
| | |
| | | } |
| | | return true; |
| | | } |
| | | bool FormatOut::JustWriter(AVStream *in, const char *filename){ |
| | | |
| | | bool FormatOut::copyCodecFromIn(std::vector<AVStream*> in){ |
| | | auto count = in.size(); |
| | | |
| | | for(int i = 0; i < count; i++) |
| | | { //根据输入流创建输出流 |
| | | AVStream *in_stream = in[i]; |
| | | AVStream *out_stream = avformat_new_stream(ctx_, in_stream->codec->codec); |
| | | if(!out_stream) |
| | | { |
| | | logIt("Failed allocating output stream.\n"); |
| | | return false; |
| | | } |
| | | |
| | | if (in_stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO){ |
| | | v_s_ = out_stream; |
| | | } |
| | | //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; |
| | | } |
| | | out_stream->codec->codec_tag = 0; |
| | | |
| | | if(ctx_->oformat->flags & AVFMT_GLOBALHEADER) |
| | | out_stream->codec->flags |= AV_CODEC_FLAG_GLOBAL_HEADER; |
| | | |
| | | } |
| | | |
| | | streams_ = in; |
| | | |
| | | return true; |
| | | } |
| | | |
| | | bool FormatOut::JustWriter(std::vector<AVStream*> in, const char *filename){ |
| | | if(ctx_){ |
| | | clear(); |
| | | } |
| | |
| | | return true; |
| | | } |
| | | |
| | | void FormatOut::adjustPTS(AVPacket &pkt, const int64_t &frame_cnt){ |
| | | void FormatOut::adjustVideoPTS(AVPacket &pkt, const int64_t &frame_cnt){ |
| | | int64_t time_stamp = frame_cnt; |
| | | |
| | | pkt.pos = -1; |
| | |
| | | pkt.dts = pkt.pts; |
| | | pkt.duration = av_rescale_q(calc_duration, time_base_q, time_base); //(double)(calc_duration)*(double)(av_q2d(time_base_q)) / (double)(av_q2d(time_base)); |
| | | |
| | | // logIt("FRAME ID: %lld, PTS : %lld, DTS : %lld", frame_cnt, pkt.pts, pkt.dts); |
| | | // logIt("FRAME ID: %lld, PTS : %lld, DTS : %lld", frame_cnt, pkt.pts, pkt.dts); |
| | | } |
| | | |
| | | void FormatOut::adjustPTS(AVPacket &pkt, const int64_t &frame_cnt){ |
| | | if (streams_.size() == 1){ |
| | | return adjustVideoPTS(pkt, frame_cnt); |
| | | } |
| | | |
| | | if (pkt.stream_index >= streams_.size()){ |
| | | logIt("adjustPTS pkt stream index too much"); |
| | | return; |
| | | } |
| | | |
| | | AVStream *in_stream,*out_stream; |
| | | |
| | | in_stream = streams_[pkt.stream_index]; |
| | | out_stream = ctx_->streams[pkt.stream_index]; |
| | | |
| | | // logIt("stream %d time_base %d : %d", pkt.stream_index, in_stream->time_base.num, in_stream->time_base.den); |
| | | // logIt("out time_base %d : %d", out_stream->time_base.num, out_stream->time_base.den); |
| | | |
| | | std::string type("video"); |
| | | if (in_stream->codecpar->codec_type == 1){ |
| | | type = "audio"; |
| | | } |
| | | |
| | | // logIt("BEFORE stream %d type: %s, pts: %lld, dts: %lld, duration: %lld", |
| | | // pkt.stream_index, type.c_str(), pkt.pts, pkt.pts, pkt.duration); |
| | | //copy packet |
| | | //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)); |
| | | //printf("pts %d dts %d base %d\n",pkt.pts,pkt.dts, in_stream->time_base); |
| | | pkt.duration = av_rescale_q(pkt.duration, in_stream->time_base, out_stream->time_base); |
| | | pkt.pos = -1; |
| | | |
| | | // logIt("AFTER stream %d type: %s, pts: %lld, dts: %lld, duration: %lld", |
| | | // pkt.stream_index, type.c_str(), pkt.pts, pkt.pts, pkt.duration); |
| | | |
| | | // //此while循环中并非所有packet都是视频帧,当收到视频帧时记录一下,仅此而已 |
| | | // if(pkt.stream_index==video_index) |
| | | // { |
| | | // printf("Receive %8d video frames from input URL\n",frame_index); |
| | | // frame_index++; |
| | | // } |
| | | |
| | | // //将包数据写入到文件。 |
| | | // ret = av_interleaved_write_frame(ofmt_ctx,&pkt); |
| | | // if(ret < 0) |
| | | // { |
| | | // /** |
| | | // 当网络有问题时,容易出现到达包的先后不一致,pts时序混乱会导致 |
| | | // av_interleaved_write_frame函数报 -22 错误。暂时先丢弃这些迟来的帧吧 |
| | | // 若所大部分包都没有pts时序,那就要看情况自己补上时序(比如较前一帧时序+1)再写入。 |
| | | // */ |
| | | // if(ret==-22){ |
| | | // continue; |
| | | // }else{ |
| | | // printf("Error muxing packet.error code %d\n" , ret); |
| | | // break; |
| | | // } |
| | | |
| | | // } |
| | | |
| | | } |
| | | |
| | | bool FormatOut::writeFrame(AVPacket &pkt, const int64_t &frame_cnt, |
| | |
| | | ret = av_write_frame(ctx_, &pkt); |
| | | } |
| | | |
| | | if(ret < 0){ |
| | | return false; |
| | | if(ret < -22 || ret == 0){ |
| | | return true; |
| | | } |
| | | |
| | | return true; |
| | | return false; |
| | | } |
| | | |
| | | bool FormatOut::writeTrailer(){ |