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• ffmpeg stops randomly with "No more output streams to write to, finishing" when reading rtsp stream [on hold]

  7 juin 2016, par ImagineDragon

  Basically I am running the following ffmpeg command to read an h264 rtsp stream using hls muxer, under Ubuntu 14.04 64bit with i7 CPU and 8GB memory :

  ffmpeg -v debug -i rtsp://172.16.11.247:554/live/ch00_0?token=hQttXvrjSPOcClQB -codec copy -flags -global_header -f hls -hls_time 5 -use_localtime 1 -hls_segment_filename '/home/eason/ffmpeg-test/%s.ts' '/home/eason/ffmpeg-test/live.m3u8'
  
  ffmpeg version N-79139-gde1a0d4 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.1)
  
    configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libfreetype --enable-gnutls --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvidstab
  
    libavutil      55. 19.100 / 55. 19.100
  
    libavcodec     57. 30.100 / 57. 30.100
  
    libavformat    57. 29.101 / 57. 29.101
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 40.102 /  6. 40.102
  
    libavresample   3.  0.  0 /  3.  0.  0
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Splitting the commandline.
  
  Reading option '-v' ... matched as option 'v' (set logging level) with argument 'debug'.
  
  Reading option '-re' ... matched as option 're' (read input at native frame rate) with argument '1'.
  
  Reading option '-i' ... matched as input file with argument 'rtsp://172.16.11.247:554/live/ch00_0?token=hQttXvrjSPOcClQB'.
  
  Reading option '-codec' ... matched as option 'codec' (codec name) with argument 'copy'.
  
  Reading option '-flags' ... matched as AVOption 'flags' with argument '-global_header'.
  
  Reading option '-f' ... matched as option 'f' (force format) with argument 'hls'.
  
  Reading option '-hls_time' ... matched as AVOption 'hls_time' with argument '5'.
  
  Reading option '-use_localtime' ... matched as AVOption 'use_localtime' with argument '1'.
  
  Reading option '-hls_segment_filename' ... matched as AVOption 'hls_segment_filename' with argument '/home/eason/ffmpeg-test/%s.ts'.
  
  Reading option '/home/eason/ffmpeg-test/live.m3u8' ... matched as output file.
  
  Finished splitting the commandline.
  
  Parsing a group of options: global .
  
  Applying option v (set logging level) with argument debug.
  
  Successfully parsed a group of options.
  
  Parsing a group of options: input file rtsp://172.16.11.247:554/live/ch00_0?token=hQttXvrjSPOcClQB.
  
  Applying option re (read input at native frame rate) with argument 1.
  
  Successfully parsed a group of options.
  
  Opening an input file: rtsp://172.16.11.247:554/live/ch00_0?token=hQttXvrjSPOcClQB.
  
  [tcp @ 0x29c4d60] No default whitelist set
  
  [rtsp @ 0x29c2e20] SDP:
  
  m=video 0 RTP/AVP 96
  
  a=rtpmap:96 H264/90000
  
  a=fmtp:96 packetization-mode=1;profile-level-id=640028;sprop-parameter-sets=Z2QAKKzoBQBbkA==,aO48sA==
  
  a=control:trackID=0
  
  m=audio 0 RTP/AVP 98
  
  a=rtpmap:98 MPEG4-GENERIC/16000/1
  
  a=fmtp:98 profile-level-id=1;mode=AAC-lbr;sizelength=13;indexlength=3;indexdeltalength=3;config=1408;cpresent=0;
  
  a=control:trackID=1
  
  
  
  
  
  [rtsp @ 0x29c2e20] video codec set to: h264
  
  [rtsp @ 0x29c2e20] RTP Packetization Mode: 1
  
  [rtsp @ 0x29c2e20] RTP Profile IDC: 64 Profile IOP: 0 Level: 28
  
  [rtsp @ 0x29c2e20] Extradata set to 0x29c4ff0 (size: 22)
  
  [rtsp @ 0x29c2e20] audio codec set to: aac
  
  [rtsp @ 0x29c2e20] audio samplerate set to: 16000
  
  [rtsp @ 0x29c2e20] audio channels set to: 1
  
  [rtp @ 0x29c50a0] No default whitelist set
  
  [udp @ 0x29c5200] No default whitelist set
  
  [udp @ 0x29c5200] end receive buffer size reported is 131072
  
  [udp @ 0x29d9480] No default whitelist set
  
  [udp @ 0x29d9480] end receive buffer size reported is 131072
  
  [rtsp @ 0x29c2e20] method SETUP failed: 461 Unsupported transport
  
  [rtsp @ 0x29c2e20] CSeq: 3
  
  
  
  [rtsp @ 0x29c2e20] setting jitter buffer size to 0
  
      Last message repeated 1 times
  
  [rtsp @ 0x29c2e20] hello state=0
  
  [rtsp @ 0x29c2e20] All info found
  
  [rtsp @ 0x29c2e20] rfps: 24.250000 0.018062
  
  [rtsp @ 0x29c2e20] rfps: 24.333333 0.012911
  
  [rtsp @ 0x29c2e20] rfps: 24.416667 0.008627
  
  [rtsp @ 0x29c2e20] rfps: 24.500000 0.005207
  
      Last message repeated 1 times
  
  [rtsp @ 0x29c2e20] rfps: 24.583333 0.002653
  
      Last message repeated 1 times
  
  [rtsp @ 0x29c2e20] rfps: 24.666667 0.000965
  
      Last message repeated 1 times
  
  [rtsp @ 0x29c2e20] rfps: 24.750000 0.000142
  
      Last message repeated 1 times
  
  [rtsp @ 0x29c2e20] rfps: 24.833333 0.000185
  
      Last message repeated 1 times
  
  [rtsp @ 0x29c2e20] rfps: 24.916667 0.001093
  
      Last message repeated 1 times
  
  [rtsp @ 0x29c2e20] rfps: 25.000000 0.002867
  
      Last message repeated 1 times
  
  [rtsp @ 0x29c2e20] rfps: 25.083333 0.005507
  
      Last message repeated 1 times
  
  [rtsp @ 0x29c2e20] rfps: 25.166667 0.009011
  
  [rtsp @ 0x29c2e20] rfps: 25.250000 0.013382
  
  [rtsp @ 0x29c2e20] rfps: 25.333333 0.018618
  
  [rtsp @ 0x29c2e20] rfps: 50.000000 0.011469
  
  Input #0, rtsp, from 'rtsp://172.16.11.247:554/live/ch00_0?token=hQttXvrjSPOcClQB':
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #0:0, 28, 1/90000: Video: h264 (High), 1 reference frame, yuv420p(left), 1280x720, 1/180000, 24.75 tbr, 90k tbn, 180k tbc
  
      Stream #0:1, 23, 1/16000: Audio: aac (LC), 16000 Hz, mono, fltp
  
  Successfully opened the file.
  
  Parsing a group of options: output file /home/eason/ffmpeg-test/live.m3u8.
  
  Applying option codec (codec name) with argument copy.
  
  Applying option f (force format) with argument hls.
  
  Successfully parsed a group of options.
  
  Opening an output file: /home/eason/ffmpeg-test/live.m3u8.
  
  Successfully opened the file.
  
  [file @ 0x2cae180] Setting default whitelist 'file,crypto'
  
  [mpegts @ 0x29f7ce0] muxrate VBR, pcr every 9000 pkts, sdt every 2147483647, pat/pmt every 2147483647 pkts
  
  Output #0, hls, to '/home/eason/ffmpeg-test/live.m3u8':
  
    Metadata:
  
      encoder         : Lavf57.29.101
  
      Stream #0:0, 0, 1/90000: Video: h264, 1 reference frame, yuv420p(left), 1280x720 (0x0), 1/90000, q=2-31, 24.75 tbr, 90k tbn, 90k tbc
  
      Stream #0:1, 0, 1/90000: Audio: aac (LC), 16000 Hz, mono
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #0:1 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  cur_dts is invalid (this is harmless if it occurs once at the start per stream)
  
      Last message repeated 103 times
  
  [hls @ 0x2a0fc00] Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly
  
  [AVIOContext @ 0x2c998c0] Statistics: 0 seeks, 155 writeouts=N/A speed=1.01x    
  
  [file @ 0x2ba60e0] Setting default whitelist 'file,crypto'
  
  [file @ 0x2ca9fc0] Setting default whitelist 'file,crypto'
  
  [hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:0
  
  [AVIOContext @ 0x2caa080] Statistics: 0 seeks, 1 writeouts
  
  [AVIOContext @ 0x2c99480] Statistics: 0 seeks, 103 writeouts=N/A speed=   1x    
  
  [file @ 0x2ba60e0] Setting default whitelist 'file,crypto'
  
  [file @ 0x2c97c60] Setting default whitelist 'file,crypto'
  
  [hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:0
  
  [AVIOContext @ 0x2c97d20] Statistics: 0 seeks, 1 writeouts
  
  [AVIOContext @ 0x2c99480] Statistics: 0 seeks, 104 writeouts=N/A speed=   1x    
  
  [file @ 0x2ba60e0] Setting default whitelist 'file,crypto'
  
  [file @ 0x2c99680] Setting default whitelist 'file,crypto'
  
  [hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:0
  
  [AVIOContext @ 0x2c99820] Statistics: 0 seeks, 1 writeouts
  
  [AVIOContext @ 0x2c99480] Statistics: 0 seeks, 28 writeoutse=N/A speed=   1x    
  
  [file @ 0x29c50c0] Setting default whitelist 'file,crypto'
  
  [file @ 0x2ba60e0] Setting default whitelist 'file,crypto'
  
  [hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:0
  
  [AVIOContext @ 0x29c2ce0] Statistics: 0 seeks, 1 writeouts
  
  [AVIOContext @ 0x2c99480] Statistics: 0 seeks, 111 writeouts=N/A speed=   1x    
  
  [file @ 0x2c97d40] Setting default whitelist 'file,crypto'
  
  [file @ 0x2a134e0] Setting default whitelist 'file,crypto'
  
  [hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:0
  
  [AVIOContext @ 0x2a11000] Statistics: 0 seeks, 1 writeouts
  
  [AVIOContext @ 0x2c99480] Statistics: 0 seeks, 105 writeouts=N/A speed=   1x    
  
  [file @ 0x29c50c0] Setting default whitelist 'file,crypto'
  
  [file @ 0x2a10c00] Setting default whitelist 'file,crypto'
  
  [hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:1
  
  [AVIOContext @ 0x2a10cc0] Statistics: 0 seeks, 1 writeouts
  
  [AVIOContext @ 0x2c99480] Statistics: 0 seeks, 103 writeouts=N/A speed=   1x    
  
  [file @ 0x29c50c0] Setting default whitelist 'file,crypto'
  
  [file @ 0x2c99480] Setting default whitelist 'file,crypto'
  
  
  
  .......repeat........
  
  
  
  [hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:71
  
  [AVIOContext @ 0x2c97fa0] Statistics: 0 seeks, 1 writeouts
  
  [rtsp @ 0x29c2e20] Too short data for FU-A H264 RTP packette=N/A speed=   1x    
  
  [AVIOContext @ 0x2ba60e0] Statistics: 0 seeks, 103 writeouts=N/A speed=   1x    
  
  [file @ 0x2c97b20] Setting default whitelist 'file,crypto'
  
  [file @ 0x2c97c60] Setting default whitelist 'file,crypto'
  
  [hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:72
  
  [AVIOContext @ 0x2c99480] Statistics: 0 seeks, 1 writeouts
  
  [AVIOContext @ 0x2ba60e0] Statistics: 0 seeks, 156 writeouts=N/A speed=   1x    
  
  [file @ 0x2c99480] Setting default whitelist 'file,crypto'
  
  [file @ 0x2cab600] Setting default whitelist 'file,crypto'
  
  [hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:73
  
  [AVIOContext @ 0x2cab6c0] Statistics: 0 seeks, 1 writeouts
  
  [AVIOContext @ 0x2ba60e0] Statistics: 0 seeks, 104 writeouts=N/A speed=   1x    
  
  [file @ 0x2cadc00] Setting default whitelist 'file,crypto'
  
  [file @ 0x2c99480] Setting default whitelist 'file,crypto'
  
  [hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:74
  
  [AVIOContext @ 0x29c2ce0] Statistics: 0 seeks, 1 writeouts
  
  [AVIOContext @ 0x2ba60e0] Statistics: 0 seeks, 103 writeouts=N/A speed=   1x    
  
  [file @ 0x2a13540] Setting default whitelist 'file,crypto'
  
  [file @ 0x2cab680] Setting default whitelist 'file,crypto'
  
  [hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:75
  
  [AVIOContext @ 0x2c99480] Statistics: 0 seeks, 1 writeouts
  
  No more output streams to write to, finishing.:46.09 bitrate=N/A speed=0.993x    
  
  [AVIOContext @ 0x2ba60e0] Statistics: 0 seeks, 138 writeouts
  
  [file @ 0x29c50c0] Setting default whitelist 'file,crypto'
  
  [hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:76
  
  [AVIOContext @ 0x2ba60e0] Statistics: 0 seeks, 1 writeouts
  
  frame= 8423 fps= 21 q=-1.0 Lsize=N/A time=00:06:46.09 bitrate=N/A speed=0.993x    
  
  video:37031kB audio:1586kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
  
  Input file #0 (rtsp://172.16.11.247:554/live/ch00_0?token=hQttXvrjSPOcClQB):
  
    Input stream #0:0 (video): 8423 packets read (37919815 bytes); 
  
    Input stream #0:1 (audio): 6345 packets read (1624337 bytes); 
  
    Total: 14768 packets (39544152 bytes) demuxed
  
  Output file #0 (/home/eason/ffmpeg-test/live.m3u8):
  
    Output stream #0:0 (video): 8423 packets muxed (37919815 bytes); 
  
    Output stream #0:1 (audio): 6345 packets muxed (1624337 bytes); 
  
    Total: 14768 packets (39544152 bytes) muxed
  
  0 frames successfully decoded, 0 decoding errors

  The problem is that ffmpeg exits randomly after 5 to 20 minutes. The RTSP is a live stream so stopping every 5 minute is really not acceptable. In the ffmpeg log I can’t see any noticeable error except "No more output streams to write to, finishing." near the end. Can someone shed some light upon this ? How can I make ffmpeg run without stopping ? Thanks

• increasing memory occupancy while recording screen save to disk with ffmpeg [on hold]

  19 mai 2016, par vbtang

  wonder if there are any resoures i didn’t free ?or do i need to do something special so that i can free these momery ?

  ps. run the demo step by step, and found it has the same problem, until it quit the main function, it still have 40MB memory occupancy. And i found the memory increase obviously in the screen capture thread,but when it increased to about 150MB, it won’t increase, until i quit the program, it will have 40MB memory left. i feel confused.

  pss. i download ffmpeg dev and shared version form here https://ffmpeg.zeranoe.com/builds/,it seems a dll of debug version ? do i need a release version ?
  here is my demo code.

      #include "stdafx.h"
  
  
  
  #ifdef  __cplusplus
  
  extern "C"
  
  {
  
  #endif
  
  #include "libavcodec/avcodec.h"
  
  #include "libavformat/avformat.h"
  
  #include "libswscale/swscale.h"
  
  #include "libavdevice/avdevice.h"
  
  #include "libavutil/audio_fifo.h"
  
  
  
  #pragma comment(lib, "avcodec.lib")
  
  #pragma comment(lib, "avformat.lib")
  
  #pragma comment(lib, "avutil.lib")
  
  #pragma comment(lib, "avdevice.lib")
  
  #pragma comment(lib, "avfilter.lib")
  
  
  
  //#pragma comment(lib, "avfilter.lib")
  
  //#pragma comment(lib, "postproc.lib")
  
  //#pragma comment(lib, "swresample.lib")
  
  #pragma comment(lib, "swscale.lib")
  
  #ifdef __cplusplus
  
  };
  
  #endif
  
  
  
  AVFormatContext *pFormatCtx_Video = NULL, *pFormatCtx_Audio = NULL, *pFormatCtx_Out = NULL;
  
  AVCodecContext  *pCodecCtx_Video;
  
  AVCodec         *pCodec_Video;
  
  AVFifoBuffer    *fifo_video = NULL;
  
  AVAudioFifo     *fifo_audio = NULL;
  
  int VideoIndex, AudioIndex;
  
  
  
  CRITICAL_SECTION AudioSection, VideoSection;
  
  
  
  
  
  
  
  SwsContext *img_convert_ctx;
  
  int frame_size = 0;
  
  
  
  uint8_t *picture_buf = NULL, *frame_buf = NULL;
  
  
  
  bool bCap = true;
  
  
  
  DWORD WINAPI ScreenCapThreadProc( LPVOID lpParam );
  
  DWORD WINAPI AudioCapThreadProc( LPVOID lpParam );
  
  
  
  int OpenVideoCapture()
  
  {
  
      AVInputFormat *ifmt=av_find_input_format("gdigrab");
  
      //
  
      AVDictionary *options = NULL;
  
      av_dict_set(&options, "framerate", "15", NULL);
  
      //av_dict_set(&options,"offset_x","20",0);
  
      //The distance from the top edge of the screen or desktop
  
      //av_dict_set(&options,"offset_y","40",0);
  
      //Video frame size. The default is to capture the full screen
  
      //av_dict_set(&options,"video_size","320x240",0);
  
      if(avformat_open_input(&pFormatCtx_Video, "desktop", ifmt, &options)!=0)
  
      {
  
          printf("Couldn't open input stream.（无法打开视频输入流）\n");
  
          return -1;
  
      }
  
      if(avformat_find_stream_info(pFormatCtx_Video,NULL)<0)
  
      {
  
          printf("Couldn't find stream information.（无法获取视频流信息）\n");
  
          return -1;
  
      }
  
      if (pFormatCtx_Video->streams[0]->codec->codec_type != AVMEDIA_TYPE_VIDEO)
  
      {
  
          printf("Couldn't find video stream information.（无法获取视频流信息）\n");
  
          return -1;
  
      }
  
      pCodecCtx_Video = pFormatCtx_Video->streams[0]->codec;
  
      pCodec_Video = avcodec_find_decoder(pCodecCtx_Video->codec_id);
  
      if(pCodec_Video == NULL)
  
      {
  
          printf("Codec not found.（没有找到解码器）\n");
  
          return -1;
  
      }
  
      if(avcodec_open2(pCodecCtx_Video, pCodec_Video, NULL) < 0)
  
      {
  
          printf("Could not open codec.（无法打开解码器）\n");
  
          return -1;
  
      }
  
  
  
  
  
  
  
      img_convert_ctx = sws_getContext(pCodecCtx_Video->width, pCodecCtx_Video->height, pCodecCtx_Video->pix_fmt, 
  
          pCodecCtx_Video->width, pCodecCtx_Video->height, PIX_FMT_YUV420P, SWS_BICUBIC, NULL, NULL, NULL); 
  
  
  
      frame_size = avpicture_get_size(pCodecCtx_Video->pix_fmt, pCodecCtx_Video->width, pCodecCtx_Video->height);
  
      //
  
      fifo_video = av_fifo_alloc(30 * avpicture_get_size(AV_PIX_FMT_YUV420P, pCodecCtx_Video->width, pCodecCtx_Video->height));
  
  
  
      return 0;
  
  }
  
  
  
  static char *dup_wchar_to_utf8(wchar_t *w)
  
  {
  
      char *s = NULL;
  
      int l = WideCharToMultiByte(CP_UTF8, 0, w, -1, 0, 0, 0, 0);
  
      s = (char *) av_malloc(l);
  
      if (s)
  
          WideCharToMultiByte(CP_UTF8, 0, w, -1, s, l, 0, 0);
  
      return s;
  
  }
  
  
  
  int OpenAudioCapture()
  
  {
  
      //
  
      AVInputFormat *pAudioInputFmt = av_find_input_format("dshow");
  
  
  
      //
  
      char * psDevName = dup_wchar_to_utf8(L"audio=virtual-audio-capturer");
  
  
  
      if (avformat_open_input(&pFormatCtx_Audio, psDevName, pAudioInputFmt,NULL) < 0)
  
      {
  
          printf("Couldn't open input stream.（无法打开音频输入流）\n");
  
          return -1;
  
      }
  
  
  
      if(avformat_find_stream_info(pFormatCtx_Audio,NULL)<0)  
  
          return -1; 
  
  
  
      if(pFormatCtx_Audio->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO)
  
      {
  
          printf("Couldn't find video stream information.（无法获取音频流信息）\n");
  
          return -1;
  
      }
  
  
  
      AVCodec *tmpCodec = avcodec_find_decoder(pFormatCtx_Audio->streams[0]->codec->codec_id);
  
      if(0 > avcodec_open2(pFormatCtx_Audio->streams[0]->codec, tmpCodec, NULL))
  
      {
  
          printf("can not find or open audio decoder!\n");
  
      }
  
  
  
  
  
  
  
      return 0;
  
  }
  
  
  
  int OpenOutPut()
  
  {
  
      AVStream *pVideoStream = NULL, *pAudioStream = NULL;
  
      const char *outFileName = "test.mp4";
  
      avformat_alloc_output_context2(&pFormatCtx_Out, NULL, NULL, outFileName);
  
  
  
      if (pFormatCtx_Video->streams[0]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
  
      {
  
          VideoIndex = 0;
  
          pVideoStream = avformat_new_stream(pFormatCtx_Out, NULL);
  
  
  
          if (!pVideoStream)
  
          {
  
              printf("can not new stream for output!\n");
  
              return -1;
  
          }
  
  
  
          //set codec context param
  
          pVideoStream->codec->codec = avcodec_find_encoder(AV_CODEC_ID_MPEG4);
  
          pVideoStream->codec->height = pFormatCtx_Video->streams[0]->codec->height;
  
          pVideoStream->codec->width = pFormatCtx_Video->streams[0]->codec->width;
  
  
  
          pVideoStream->codec->time_base = pFormatCtx_Video->streams[0]->codec->time_base;
  
          pVideoStream->codec->sample_aspect_ratio = pFormatCtx_Video->streams[0]->codec->sample_aspect_ratio;
  
          // take first format from list of supported formats
  
          pVideoStream->codec->pix_fmt = pFormatCtx_Out->streams[VideoIndex]->codec->codec->pix_fmts[0];
  
  
  
          //open encoder
  
          if (!pVideoStream->codec->codec)
  
          {
  
              printf("can not find the encoder!\n");
  
              return -1;
  
          }
  
  
  
          if (pFormatCtx_Out->oformat->flags & AVFMT_GLOBALHEADER)
  
              pVideoStream->codec->flags |= CODEC_FLAG_GLOBAL_HEADER;
  
  
  
          if ((avcodec_open2(pVideoStream->codec, pVideoStream->codec->codec, NULL)) < 0)
  
          {
  
              printf("can not open the encoder\n");
  
              return -1;
  
          }
  
      }
  
  
  
      if(pFormatCtx_Audio->streams[0]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
  
      {
  
          AVCodecContext *pOutputCodecCtx;
  
          AudioIndex = 1;
  
          pAudioStream = avformat_new_stream(pFormatCtx_Out, NULL);
  
  
  
          pAudioStream->codec->codec = avcodec_find_encoder(pFormatCtx_Out->oformat->audio_codec);
  
  
  
          pOutputCodecCtx = pAudioStream->codec;
  
  
  
          pOutputCodecCtx->sample_rate = pFormatCtx_Audio->streams[0]->codec->sample_rate;
  
          pOutputCodecCtx->channel_layout = pFormatCtx_Out->streams[0]->codec->channel_layout;
  
          pOutputCodecCtx->channels = av_get_channel_layout_nb_channels(pAudioStream->codec->channel_layout);
  
          if(pOutputCodecCtx->channel_layout == 0)
  
          {
  
              pOutputCodecCtx->channel_layout = AV_CH_LAYOUT_STEREO;
  
              pOutputCodecCtx->channels = av_get_channel_layout_nb_channels(pOutputCodecCtx->channel_layout);
  
  
  
          }
  
          pOutputCodecCtx->sample_fmt = pAudioStream->codec->codec->sample_fmts[0];
  
          AVRational time_base={1, pAudioStream->codec->sample_rate};
  
          pAudioStream->time_base = time_base;
  
          //audioCodecCtx->time_base = time_base;
  
  
  
          pOutputCodecCtx->codec_tag = 0;  
  
          if (pFormatCtx_Out->oformat->flags & AVFMT_GLOBALHEADER)  
  
              pOutputCodecCtx->flags |= CODEC_FLAG_GLOBAL_HEADER;
  
  
  
          if (avcodec_open2(pOutputCodecCtx, pOutputCodecCtx->codec, 0) < 0)
  
          {
  
              //
  
              return -1;
  
          }
  
      }
  
  
  
      if (!(pFormatCtx_Out->oformat->flags & AVFMT_NOFILE))
  
      {
  
          if(avio_open(&pFormatCtx_Out->pb, outFileName, AVIO_FLAG_WRITE) < 0)
  
          {
  
              printf("can not open output file handle!\n");
  
              return -1;
  
          }
  
      }
  
  
  
      if(avformat_write_header(pFormatCtx_Out, NULL) < 0)
  
      {
  
          printf("can not write the header of the output file!\n");
  
          return -1;
  
      }
  
  
  
      return 0;
  
  }
  
  
  
  int _tmain(int argc, _TCHAR* argv[])
  
  {
  
      av_register_all();
  
      avdevice_register_all();
  
      if (OpenVideoCapture() < 0)
  
      {
  
          return -1;
  
      }
  
      if (OpenAudioCapture() < 0)
  
      {
  
          return -1;
  
      }
  
      if (OpenOutPut() < 0)
  
      {
  
          return -1;
  
      }
  
  
  
      InitializeCriticalSection(&VideoSection);
  
      InitializeCriticalSection(&AudioSection);
  
  
  
      AVFrame *picture = av_frame_alloc();
  
      int size = avpicture_get_size(pFormatCtx_Out->streams[VideoIndex]->codec->pix_fmt, 
  
          pFormatCtx_Out->streams[VideoIndex]->codec->width, pFormatCtx_Out->streams[VideoIndex]->codec->height);
  
      picture_buf = new uint8_t[size];
  
  
  
      avpicture_fill((AVPicture *)picture, picture_buf, 
  
          pFormatCtx_Out->streams[VideoIndex]->codec->pix_fmt, 
  
          pFormatCtx_Out->streams[VideoIndex]->codec->width, 
  
          pFormatCtx_Out->streams[VideoIndex]->codec->height);
  
  
  
  
  
  
  
      //star cap screen thread
  
      CreateThread( NULL, 0, ScreenCapThreadProc, 0, 0, NULL);
  
      //star cap audio thread
  
      CreateThread( NULL, 0, AudioCapThreadProc, 0, 0, NULL);
  
      int64_t cur_pts_v=0,cur_pts_a=0;
  
      int VideoFrameIndex = 0, AudioFrameIndex = 0;
  
  
  
      while(1)
  
      {
  
          if (_kbhit() != 0 && bCap)
  
          {
  
              bCap = false;
  
              Sleep(2000);//
  
          }
  
          if (fifo_audio && fifo_video)
  
          {
  
              int sizeAudio = av_audio_fifo_size(fifo_audio);
  
              int sizeVideo = av_fifo_size(fifo_video);
  
              //
  
              if (av_audio_fifo_size(fifo_audio) <= pFormatCtx_Out->streams[AudioIndex]->codec->frame_size && 
  
                  av_fifo_size(fifo_video) <= frame_size && !bCap)
  
              {
  
                  break;
  
              }
  
          }
  
  
  
          if(av_compare_ts(cur_pts_v, pFormatCtx_Out->streams[VideoIndex]->time_base, 
  
              cur_pts_a,pFormatCtx_Out->streams[AudioIndex]->time_base) <= 0)
  
          {
  
              //read data from fifo
  
              if (av_fifo_size(fifo_video) < frame_size && !bCap)
  
              {
  
                  cur_pts_v = 0x7fffffffffffffff;
  
              }
  
              if(av_fifo_size(fifo_video) >= size)
  
              {
  
                  EnterCriticalSection(&VideoSection);
  
                  av_fifo_generic_read(fifo_video, picture_buf, size, NULL);
  
                  LeaveCriticalSection(&VideoSection);
  
  
  
                  avpicture_fill((AVPicture *)picture, picture_buf, 
  
                      pFormatCtx_Out->streams[VideoIndex]->codec->pix_fmt, 
  
                      pFormatCtx_Out->streams[VideoIndex]->codec->width, 
  
                      pFormatCtx_Out->streams[VideoIndex]->codec->height);
  
  
  
                  //pts = n * (（1 / timbase）/ fps);
  
                  picture->pts = VideoFrameIndex * ((pFormatCtx_Video->streams[0]->time_base.den / pFormatCtx_Video->streams[0]->time_base.num) / 15);
  
  
  
                  int got_picture = 0;
  
                  AVPacket pkt;
  
                  av_init_packet(&pkt);
  
  
  
                  pkt.data = NULL;
  
                  pkt.size = 0;
  
                  int ret = avcodec_encode_video2(pFormatCtx_Out->streams[VideoIndex]->codec, &pkt, picture, &got_picture);
  
                  if(ret < 0)
  
                  {
  
                      //
  
                      continue;
  
                  }
  
  
  
                  if (got_picture==1)
  
                  {
  
                      pkt.stream_index = VideoIndex;
  
                      pkt.pts = av_rescale_q_rnd(pkt.pts, pFormatCtx_Video->streams[0]->time_base, 
  
                          pFormatCtx_Out->streams[VideoIndex]->time_base, (AVRounding)(AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX));  
  
                      pkt.dts = av_rescale_q_rnd(pkt.dts,  pFormatCtx_Video->streams[0]->time_base, 
  
                          pFormatCtx_Out->streams[VideoIndex]->time_base, (AVRounding)(AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX));  
  
  
  
                      pkt.duration = ((pFormatCtx_Out->streams[0]->time_base.den / pFormatCtx_Out->streams[0]->time_base.num) / 15);
  
  
  
                      cur_pts_v = pkt.pts;
  
  
  
                      ret = av_interleaved_write_frame(pFormatCtx_Out, &pkt);
  
                      //delete[] pkt.data;
  
                      av_free_packet(&pkt);
  
                  }
  
                  VideoFrameIndex++;
  
              }
  
          }
  
          else
  
          {
  
              if (NULL == fifo_audio)
  
              {
  
                  continue;//
  
              }
  
              if (av_audio_fifo_size(fifo_audio) < pFormatCtx_Out->streams[AudioIndex]->codec->frame_size && !bCap)
  
              {
  
                  cur_pts_a = 0x7fffffffffffffff;
  
              }
  
              if(av_audio_fifo_size(fifo_audio) >= 
  
                  (pFormatCtx_Out->streams[AudioIndex]->codec->frame_size > 0 ? pFormatCtx_Out->streams[AudioIndex]->codec->frame_size : 1024))
  
              {
  
                  AVFrame *frame;
  
                  frame = av_frame_alloc();
  
                  frame->nb_samples = pFormatCtx_Out->streams[AudioIndex]->codec->frame_size>0 ? pFormatCtx_Out->streams[AudioIndex]->codec->frame_size: 1024;
  
                  frame->channel_layout = pFormatCtx_Out->streams[AudioIndex]->codec->channel_layout;
  
                  frame->format = pFormatCtx_Out->streams[AudioIndex]->codec->sample_fmt;
  
                  frame->sample_rate = pFormatCtx_Out->streams[AudioIndex]->codec->sample_rate;
  
                  av_frame_get_buffer(frame, 0);
  
  
  
                  EnterCriticalSection(&AudioSection);
  
                  av_audio_fifo_read(fifo_audio, (void **)frame->data, 
  
                      (pFormatCtx_Out->streams[AudioIndex]->codec->frame_size > 0 ? pFormatCtx_Out->streams[AudioIndex]->codec->frame_size : 1024));
  
                  LeaveCriticalSection(&AudioSection);
  
  
  
                  if (pFormatCtx_Out->streams[0]->codec->sample_fmt != pFormatCtx_Audio->streams[AudioIndex]->codec->sample_fmt 
  
                      || pFormatCtx_Out->streams[0]->codec->channels != pFormatCtx_Audio->streams[AudioIndex]->codec->channels 
  
                      || pFormatCtx_Out->streams[0]->codec->sample_rate != pFormatCtx_Audio->streams[AudioIndex]->codec->sample_rate)
  
                  {
  
                      //
  
                  }
  
  
  
                  AVPacket pkt_out;
  
                  av_init_packet(&pkt_out);
  
                  int got_picture = -1;
  
                  pkt_out.data = NULL;
  
                  pkt_out.size = 0;
  
  
  
                  frame->pts = AudioFrameIndex * pFormatCtx_Out->streams[AudioIndex]->codec->frame_size;
  
                  if (avcodec_encode_audio2(pFormatCtx_Out->streams[AudioIndex]->codec, &pkt_out, frame, &got_picture) < 0)
  
                  {
  
                      printf("can not decoder a frame");
  
                  }
  
                  av_frame_free(&frame);
  
                  if (got_picture) 
  
                  {
  
                      pkt_out.stream_index = AudioIndex;
  
                      pkt_out.pts = AudioFrameIndex * pFormatCtx_Out->streams[AudioIndex]->codec->frame_size;
  
                      pkt_out.dts = AudioFrameIndex * pFormatCtx_Out->streams[AudioIndex]->codec->frame_size;
  
                      pkt_out.duration = pFormatCtx_Out->streams[AudioIndex]->codec->frame_size;
  
  
  
                      cur_pts_a = pkt_out.pts;
  
  
  
                      int ret = av_interleaved_write_frame(pFormatCtx_Out, &pkt_out);
  
                      av_free_packet(&pkt_out);
  
                  }
  
                  AudioFrameIndex++;
  
              }
  
          }
  
      }
  
  
  
      delete[] picture_buf;
  
  
  
      delete[]frame_buf;
  
      av_fifo_free(fifo_video);
  
      av_audio_fifo_free(fifo_audio);
  
  
  
      av_write_trailer(pFormatCtx_Out);
  
  
  
      avio_close(pFormatCtx_Out->pb);
  
      avformat_free_context(pFormatCtx_Out);
  
  
  
      if (pFormatCtx_Video != NULL)
  
      {
  
          avformat_close_input(&pFormatCtx_Video);
  
          pFormatCtx_Video = NULL;
  
      }
  
      if (pFormatCtx_Audio != NULL)
  
      {
  
          avformat_close_input(&pFormatCtx_Audio);
  
          pFormatCtx_Audio = NULL;
  
      }
  
      if (NULL != img_convert_ctx)
  
      {
  
          sws_freeContext(img_convert_ctx);
  
          img_convert_ctx = NULL;
  
      }
  
  
  
      return 0;
  
  }
  
  
  
  DWORD WINAPI ScreenCapThreadProc( LPVOID lpParam )
  
  {
  
      AVPacket packet;/* = (AVPacket *)av_malloc(sizeof(AVPacket))*/;
  
      int got_picture;
  
      AVFrame *pFrame;
  
      pFrame= av_frame_alloc();
  
  
  
      AVFrame *picture = av_frame_alloc();
  
      int size = avpicture_get_size(pFormatCtx_Out->streams[VideoIndex]->codec->pix_fmt, 
  
          pFormatCtx_Out->streams[VideoIndex]->codec->width, pFormatCtx_Out->streams[VideoIndex]->codec->height);
  
      //picture_buf = new uint8_t[size];
  
  
  
      avpicture_fill((AVPicture *)picture, picture_buf, 
  
          pFormatCtx_Out->streams[VideoIndex]->codec->pix_fmt, 
  
          pFormatCtx_Out->streams[VideoIndex]->codec->width, 
  
          pFormatCtx_Out->streams[VideoIndex]->codec->height);
  
  
  
  //  FILE *p = NULL;
  
  //  p = fopen("proc_test.yuv", "wb+");
  
      av_init_packet(&packet);
  
      int height = pFormatCtx_Out->streams[VideoIndex]->codec->height;
  
      int width = pFormatCtx_Out->streams[VideoIndex]->codec->width;
  
      int y_size=height*width;
  
      while(bCap)
  
      {
  
          packet.data = NULL;
  
          packet.size = 0;
  
          if (av_read_frame(pFormatCtx_Video, &packet) < 0)
  
          {
  
              av_free_packet(&packet);
  
              continue;
  
          }
  
          if(packet.stream_index == 0)
  
          {
  
              if (avcodec_decode_video2(pCodecCtx_Video, pFrame, &got_picture, &packet) < 0)
  
              {
  
                  printf("Decode Error.（解码错误）\n");
  
                  continue;
  
              }
  
              if (got_picture)
  
              {
  
                  sws_scale(img_convert_ctx, (const uint8_t* const*)pFrame->data, pFrame->linesize, 0, 
  
                      pFormatCtx_Out->streams[VideoIndex]->codec->height, picture->data, picture->linesize);
  
  
  
                  if (av_fifo_space(fifo_video) >= size)
  
                  {
  
                      EnterCriticalSection(&VideoSection);                    
  
                      av_fifo_generic_write(fifo_video, picture->data[0], y_size, NULL);
  
                      av_fifo_generic_write(fifo_video, picture->data[1], y_size/4, NULL);
  
                      av_fifo_generic_write(fifo_video, picture->data[2], y_size/4, NULL);
  
                      LeaveCriticalSection(&VideoSection);
  
                  }
  
              }
  
          }
  
          av_free_packet(&packet);
  
          //Sleep(50);
  
      }
  
      av_frame_free(&pFrame);
  
      av_frame_free(&picture);
  
      //delete[] picture_buf;
  
      return 0;
  
  }
  
  
  
  DWORD WINAPI AudioCapThreadProc( LPVOID lpParam )
  
  {
  
      AVPacket pkt;
  
      AVFrame *frame;
  
      frame = av_frame_alloc();
  
      int gotframe;
  
      while(bCap)
  
      {
  
          pkt.data = NULL;
  
          pkt.size = 0;
  
          if(av_read_frame(pFormatCtx_Audio,&pkt) < 0)
  
          {
  
              av_free_packet(&pkt);
  
              continue;
  
          }
  
  
  
          if (avcodec_decode_audio4(pFormatCtx_Audio->streams[0]->codec, frame, &gotframe, &pkt) < 0)
  
          {
  
              av_frame_free(&frame);
  
              printf("can not decoder a frame");
  
              break;
  
          }
  
          av_free_packet(&pkt);
  
  
  
          if (!gotframe)
  
          {
  
              continue;//
  
          }
  
  
  
          if (NULL == fifo_audio)
  
          {
  
              fifo_audio = av_audio_fifo_alloc(pFormatCtx_Audio->streams[0]->codec->sample_fmt, 
  
                  pFormatCtx_Audio->streams[0]->codec->channels, 30 * frame->nb_samples);
  
          }
  
  
  
          int buf_space = av_audio_fifo_space(fifo_audio);
  
          if (av_audio_fifo_space(fifo_audio) >= frame->nb_samples)
  
          {
  
              EnterCriticalSection(&AudioSection);
  
              av_audio_fifo_write(fifo_audio, (void **)frame->data, frame->nb_samples);
  
              LeaveCriticalSection(&AudioSection);
  
          }
  
      }
  
      av_frame_free(&frame);
  
      return 0;
  
  }

• Why calling libav* library doesn't have same quality as ffmpeg command line ?

  10 mai 2016, par seaguest

  I am using the ffmpeg 3 to do the video format conversion, it works fine when I use the command line mode, but when I call the libav* library, I get a audio quality loss problem (there is a lot of noises in the audio).

  Here are the two files :

  mv.webm - original file
  mv2.mp4 converted with libarary , a lot of noises

  Here is the probe information for the mv.webm :

  $ ffprobe mv.webm
  
  ffprobe version N-79826-g64fd62d Copyright (c) 2007-2016 the FFmpeg developers
  
    built with gcc 5.3.1 (Ubuntu 5.3.1-14ubuntu2) 20160413
  
    configuration: --prefix=/home/seaguest/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/seaguest/ffmpeg_build/include --extra-ldflags=-L/home/seaguest/ffmpeg_build/lib --enable-gpl --enable-libfdk-aac --enable-libx264 --enable-libx265 --enable-nonfree
  
    libavutil      55. 24.100 / 55. 24.100
  
    libavcodec     57. 39.100 / 57. 39.100
  
    libavformat    57. 36.100 / 57. 36.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 45.100 /  6. 45.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Input #0, matroska,webm, from 'mv.webm':
  
    Metadata:
  
      encoder         : Lavf57.36.100
  
    Duration: 00:00:30.00, start: 0.000000, bitrate: 935 kb/s
  
      Stream #0:0: Video: vp8, yuv420p, 640x480, SAR 1:1 DAR 4:3, 25 fps, 25 tbr, 1k tbn (default)
  
      Stream #0:1: Audio: vorbis, 44100 Hz, stereo, fltp (default)

  I checked the log printed by command line mode and calling code mode, the setting looks like the same, here are the logs :

  $ ffmpeg -i mv.webm -c:a aac -c:v libx264  mv.mp4
  
  ffmpeg version N-79826-g64fd62d Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 5.3.1 (Ubuntu 5.3.1-14ubuntu2) 20160413
  
    configuration: --prefix=/home/seaguest/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/seaguest/ffmpeg_build/include --extra-ldflags=-L/home/seaguest/ffmpeg_build/lib --enable-gpl --enable-libfdk-aac --enable-libx264 --enable-libx265 --enable-nonfree
  
    libavutil      55. 24.100 / 55. 24.100
  
    libavcodec     57. 39.100 / 57. 39.100
  
    libavformat    57. 36.100 / 57. 36.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 45.100 /  6. 45.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Input #0, matroska,webm, from 'mv.webm':
  
    Metadata:
  
      encoder         : Lavf57.36.100
  
    Duration: 00:00:30.00, start: 0.000000, bitrate: 935 kb/s
  
      Stream #0:0: Video: vp8, yuv420p, 640x480, SAR 1:1 DAR 4:3, 25 fps, 25 tbr, 1k tbn (default)
  
      Stream #0:1: Audio: vorbis, 44100 Hz, stereo, fltp (default)
  
  [libx264 @ 0x3e5d880] using SAR=1/1
  
  [libx264 @ 0x3e5d880] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
  
  [libx264 @ 0x3e5d880] profile High, level 3.0
  
  [libx264 @ 0x3e5d880] 264 - core 148 r2643 5c65704 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  [mp4 @ 0x3e2f680] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
  
      Last message repeated 1 times
  
  Output #0, mp4, to 'mv.mp4':
  
    Metadata:
  
      encoder         : Lavf57.36.100
  
      Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 640x480 [SAR 1:1 DAR 4:3], q=2-31, 25 fps, 12800 tbn (default)
  
      Metadata:
  
        encoder         : Lavc57.39.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
      Stream #0:1: Audio: aac (LC) ([64][0][0][0] / 0x0040), 44100 Hz, stereo, fltp, 128 kb/s (default)
  
      Metadata:
  
        encoder         : Lavc57.39.100 aac
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (vp8 (native) -> h264 (libx264))
  
    Stream #0:1 -> #0:1 (vorbis (native) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  frame=  750 fps=229 q=-1.0 Lsize=    2508kB time=00:00:30.02 bitrate= 684.5kbits/s speed=9.17x
  
  video:2023kB audio:459kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.052857%
  
  [libx264 @ 0x3e5d880] frame I:11    Avg QP:15.29  size: 20395
  
  [libx264 @ 0x3e5d880] frame P:345   Avg QP:20.93  size:  4350
  
  [libx264 @ 0x3e5d880] frame B:394   Avg QP:23.55  size:   879
  
  [libx264 @ 0x3e5d880] consecutive B-frames: 25.2%  3.2% 33.2% 38.4%
  
  [libx264 @ 0x3e5d880] mb I  I16..4: 44.1% 32.5% 23.4%
  
  [libx264 @ 0x3e5d880] mb P  I16..4:  1.5%  3.6%  0.6%  P16..4: 28.9% 11.2%  4.7%  0.0%  0.0%    skip:49.5%
  
  [libx264 @ 0x3e5d880] mb B  I16..4:  0.0%  0.1%  0.0%  B16..8: 27.4%  2.0%  0.4%  direct: 0.8%  skip:69.3%  L0:40.0% L1:53.3% BI: 6.7%
  
  [libx264 @ 0x3e5d880] 8x8 transform intra:52.6% inter:74.9%
  
  [libx264 @ 0x3e5d880] coded y,uvDC,uvAC intra: 57.5% 68.6% 35.9% inter: 10.6% 11.9% 2.6%
  
  [libx264 @ 0x3e5d880] i16 v,h,dc,p: 36% 42%  7% 15%
  
  [libx264 @ 0x3e5d880] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 15% 23% 15% 6%  7%  7% 10%  7% 10%
  
  [libx264 @ 0x3e5d880] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 20% 27% 14% 6%  8%  7%  7%  6%  6%
  
  [libx264 @ 0x3e5d880] i8c dc,h,v,p: 46% 34% 11%  9%
  
  [libx264 @ 0x3e5d880] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 0x3e5d880] ref P L0: 63.9% 20.8% 11.2%  4.1%
  
  [libx264 @ 0x3e5d880] ref B L0: 93.1%  6.1%  0.8%
  
  [libx264 @ 0x3e5d880] ref B L1: 95.8%  4.2%
  
  [libx264 @ 0x3e5d880] kb/s:552.32
  
  [aac @ 0x3e5ec00] Qavg: 3030.804
  
  
  
  
  
  $ ffprobe mv.mp4
  
  ffprobe version N-79826-g64fd62d Copyright (c) 2007-2016 the FFmpeg developers
  
    built with gcc 5.3.1 (Ubuntu 5.3.1-14ubuntu2) 20160413
  
    configuration: --prefix=/home/seaguest/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/seaguest/ffmpeg_build/include --extra-ldflags=-L/home/seaguest/ffmpeg_build/lib --enable-gpl --enable-libfdk-aac --enable-libx264 --enable-libx265 --enable-nonfree
  
    libavutil      55. 24.100 / 55. 24.100
  
    libavcodec     57. 39.100 / 57. 39.100
  
    libavformat    57. 36.100 / 57. 36.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 45.100 /  6. 45.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'mv.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf57.36.100
  
    Duration: 00:00:30.01, start: 0.000000, bitrate: 684 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 552 kb/s, 25 fps, 25 tbr, 12800 tbn (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler

  For the calling code mode :

  $ go run transcode.go mv.webm mv1.mp4
  
  # github.com/3d0c/gmf
  
  ../packet.go: In function ‘_cgo_3c42eeb63b1e_Cfunc_avcodec_decode_audio4’:
  
  ../packet.go:87:2: warning: ‘avcodec_decode_audio4’ is deprecated [-Wdeprecated-declarations]
  
   func (this *Packet) decode(cc *CodecCtx, frame *Frame) (*Frame, bool, int, error) {
  
    ^
  
  In file included from ../packet.go:7:0:
  
  /home/seaguest/ffmpeg_build/include/libavcodec/avcodec.h:4685:5: note: declared here
  
   int avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame,
  
       ^
  
  ../packet.go: In function ‘_cgo_3c42eeb63b1e_Cfunc_avcodec_decode_video2’:
  
  ../packet.go:104:2: warning: ‘avcodec_decode_video2’ is deprecated [-Wdeprecated-declarations]
  
     }
  
    ^
  
  In file included from ../packet.go:7:0:
  
  /home/seaguest/ffmpeg_build/include/libavcodec/avcodec.h:4734:5: note: declared here
  
   int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
  
       ^
  
  [libx264 @ 0x2d82400] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
  
  [libx264 @ 0x2d82400] profile High, level 3.0
  
  [libx264 @ 0x2d82400] 264 - core 148 r2643 5c65704 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  [mp4 @ 0x2d480c0] Using AVStream.codec.time_base as a timebase hint to the muxer is deprecated. Set AVStream.time_base instead.
  
  [mp4 @ 0x2d480c0] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
  
  [mp4 @ 0x2d480c0] Using AVStream.codec.time_base as a timebase hint to the muxer is deprecated. Set AVStream.time_base instead.
  
  [mp4 @ 0x2d480c0] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
  
  
  
  
  
  
  
  $ ffprobe mv1.mp4
  
  ffprobe version N-79826-g64fd62d Copyright (c) 2007-2016 the FFmpeg developers
  
    built with gcc 5.3.1 (Ubuntu 5.3.1-14ubuntu2) 20160413
  
    configuration: --prefix=/home/seaguest/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/seaguest/ffmpeg_build/include --extra-ldflags=-L/home/seaguest/ffmpeg_build/lib --enable-gpl --enable-libfdk-aac --enable-libx264 --enable-libx265 --enable-nonfree
  
    libavutil      55. 24.100 / 55. 24.100
  
    libavcodec     57. 39.100 / 57. 39.100
  
    libavformat    57. 36.100 / 57. 36.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 45.100 /  6. 45.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'mv1.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf57.36.100
  
    Duration: 00:00:30.00, start: 0.000000, bitrate: 751 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 640x480, 613 kb/s, 25 fps, 25 tbr, 12800 tbn (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 130 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler

  Checking the setting section, crf=23.0 for both (the rest are exactly the same), but the output bitrate are different (the audio for calling code mode has a lot of noises), how is that possible ?

  Why the command line mode and use libav* library mode with same setting, but have different output ?
  What should I do to call libav* library to get lossless video conversion ?