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• Writing only video (no audio) file using ffmpeg. av_write_header fails

  19 janvier 2018, par Kamal

  I have RTP packets with VP8 encoded data. I want to write it to a mkv file or webm file. I tried a bit, but I have not been successful yet. My code is as below

  #include 
  
  #include 
  
  #include 
  
  #include 
  
  #include 
  
  
  
  #include <libavutil></libavutil>avassert.h>
  
  #include <libavutil></libavutil>channel_layout.h>
  
  #include <libavutil></libavutil>opt.h>
  
  #include <libavutil></libavutil>mathematics.h>
  
  #include <libavutil></libavutil>timestamp.h>
  
  #include <libavformat></libavformat>avformat.h>
  
  #include <libswscale></libswscale>swscale.h>
  
  #include <libswresample></libswresample>swresample.h>
  
  
  
  bool mfmedia_init_ffmpeg();
  
  void mfmedia_ffprint(void *handle, int cnt, const char *format, va_list valist);
  
  
  
  int main()
  
  {
  
      mfmedia_init_ffmpeg();
  
      return 0;
  
  }
  
  
  
  bool mfmedia_init_ffmpeg() 
  
  {
  
      bool ret = false;
  
  
  
      AVCodecContext* context;
  
      AVCodec* codec;
  
      AVFormatContext* format;
  
      AVStream* stream;
  
  
  
      unsigned fps = 24;
  
      unsigned width = 768;
  
      unsigned height = 608;
  
  
  
      av_register_all();
  
  
  
      int err = 0;
  
      char errorLog[128] = { 0 };
  
  
  
      av_log_set_level(AV_LOG_TRACE);
  
      av_log_set_callback(mfmedia_ffprint);
  
  
  
      err = avformat_alloc_output_context2(&amp;format, NULL, NULL, "o.webm");
  
      if (err &lt; 0) 
  
      {
  
          printf("Cannot allocate output context: %s\n", av_make_error_string(errorLog, 128, err));
  
          goto last;
  
      }
  
  
  
      codec = avcodec_find_encoder(AV_CODEC_ID_VP8);
  
      if (!codec) 
  
      {
  
          printf("Cannot find an encoder\n");
  
          goto last;
  
      }
  
  
  
      context = avcodec_alloc_context3(codec);
  
      if (!context) 
  
      {
  
          printf("Cannot allocate a codec context\n");
  
          goto last;
  
      }
  
  
  
      context->pix_fmt = AV_PIX_FMT_YUV420P;
  
      context->width = width;
  
      context->height = height;
  
      context->time_base = (AVRational){1, fps};
  
  
  
      err = avcodec_open2(context, codec, NULL);
  
      if(err &lt; 0) 
  
      {
  
          printf("Cannot open codec: %s\n", av_make_error_string(errorLog, 128, err));
  
          goto last;
  
      }
  
  
  
      stream = avformat_new_stream(format, codec);
  
      if (!stream) 
  
      {
  
          printf("Cannot create a new stream\n");
  
          goto last;
  
      }
  
  
  
      //av_dump_format(format, 0, "o.webm", 1);
  
  
  
      err = avio_open(&amp;format->pb, "o.webm", AVIO_FLAG_WRITE);
  
      if(err &lt; 0) 
  
      {
  
          printf("Cannot open output: %s\n", av_make_error_string(errorLog, 128, err));
  
          goto last;
  
      }
  
  
  
      err = avformat_write_header(format, NULL); 
  
      if(err &lt; 0) 
  
      {
  
          printf("Cannot write header to stream: %s\n", av_make_error_string(errorLog, 128, err));
  
          goto last;
  
      }
  
      ret = true;
  
  
  
  last:
  
      return ret;
  
  }
  
  
  
  void mfmedia_ffprint(void *handle, int cnt, const char *format, va_list valist)
  
  {
  
      char *log_buf = (char *)malloc(38192);
  
      int length;
  
  
  
      if(log_buf)
  
      {
  
          time_t rawtime;
  
          time ( &amp;rawtime );
  
  
  
          length = vsprintf(log_buf ,format, valist);
  
          length += sprintf((log_buf + length), " : %s ", ctime (&amp;rawtime));
  
          *(log_buf + length) = 0x0;
  
  
  
          printf("%s", log_buf);
  
          fflush(stdout);
  
          free(log_buf);
  
      }
  
  }

  It is failing when I call avformat_write_header.

  From trace log (towards end) I see

  Setting default whitelist ’file,crypto’
   : Fri Jan 19 16:58:57 2018
  Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
   : Fri Jan 19 16:58:57 2018
  dimensions not set
   : Fri Jan 19 16:58:57 2018
  Cannot write header to stream : Invalid argument
  

  Please let me know why avformat_write_header is failing.

• Unplayable video after running FFmpeg command

  25 mai 2020, par HB.

  I asked this question last year. I resolved the issue I had and I implemented the same logic for merging an image with a video, instead of two images. This is running on Android.

  



  Here is the command I'm using currently :

  



  "-i", mFilePath, "-i", drawingPath, "-filter_complex", "[0:v]scale=iw*sar:ih,setsar=1,pad='max(iw\\,2*trunc(ih*47/80/2))':'max(ih\\,2*trunc(ow*80/47/2))':(ow-iw)/2:(oh-ih)/2[v0];[1:v][v0]scale2ref[v1][v0];[v0][v1]overlay=x=(W-w)/2:y=(H-h)/2[v]", "-map", "[v]", "-map", "0:a", "-c:v", "libx264", "-preset", "ultrafast", "-r", outputFPS, outputPath}


  



  47/80/2 is calculated by getting a device's screen dimensions - 1128 x 1920.

  



  When running this on certain devices, it results in an unplayable video.

  



  But running the following command works perfectly fine :

  



  "-i", mFilePath, "-crf", "18", "-c:v", "libx264", "-preset", "ultrafast", outputPath};


  



  I think the issue is with the filter being applied ?

  



  ---

  



  I compared running the first command on two different devices.

  



  

  • On the first device (Samsung J7 Pro), I was able to run the command successfully and play the video afterward. I tested the output on both devices and it is working.

  


  • On the second device (Sony Xperia Tablet Z), I was able to run the command successfully but could not play the video. I tested the output on both devices and it doesn't play on either. It does play on my computer.

  


  



  I compared the original video with the one not working and the one without a filter and the only difference I could find is that the one that is not working profile is Baseline@L4.2 and the one without a filter profile is Baseline@L4.0. The original video profile is High@L4.0.

  



  Here are all the videos. The original, the one without a filter (working) and the one with the filter(no working).

  



  I have no idea why this is happening ? Any help would be appreciated.

  



  ---

  



  Edit 1 :

  



  Here is the actual log as requested :

  



  "-i", "/storage/emulated/0/Android/data/com.my.package/files/CameraTemp/2020_05_24_09_17_53.mp4", "-i", "/storage/emulated/0/Android/data/com.my.package/files/MyVideos/tempShapes.png", "-filter_complex", "[0:v]scale=iw*sar:ih,setsar=1,pad='max(iw\\,2*trunc(ih*47/80/2))':'max(ih\\,2*trunc(ow*80/47/2))':(ow-iw)/2:(oh-ih)/2[v0];[1:v][v0]scale2ref[v1][v0];[v0][v1]overlay=x=(W-w)/2:y=(H-h)/2[v]", "-map", "[v]", "-map", "0:a", "-c:v", "libx264", "-preset", "ultrafast", "-r", "30", "/storage/emulated/0/Android/data/com.my.package/files/MyVideos/video with line.mp4"


  



  and here is the complete log :

  



  ffmpeg version n4.0-39-gda39990 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 4.9.x (GCC) 20150123 (prerelease)
  configuration: --target-os=linux --cross-prefix=/root/bravobit/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/root/bravobit/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-ffprobe --enable-libopus --enable-libvorbis --enable-libfdk-aac --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-libvpx --enable-libass --enable-yasm --enable-pthreads --disable-debug --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-linux-perf --disable-doc --disable-shared --enable-static --enable-runtime-cpudetect --enable-nonfree --enable-network --enable-avresample --enable-avformat --enable-avcodec --enable-indev=lavfi --enable-hwaccels --enable-ffmpeg --enable-zlib --enable-gpl --enable-small --enable-nonfree --pkg-config=pkg-config --pkg-config-flags=--static --prefix=/root/bravobit/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/root/bravobit/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/root/bravobit/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-cxxflags=
  libavutil      56. 14.100 / 56. 14.100
  libavcodec     58. 18.100 / 58. 18.100
  libavformat    58. 12.100 / 58. 12.100
  libavdevice    58.  3.100 / 58.  3.100
  libavfilter     7. 16.100 /  7. 16.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  1.100 /  5.  1.100
  libswresample   3.  1.100 /  3.  1.100
  libpostproc    55.  1.100 / 55.  1.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Android/data/com.my.package/files/CameraTemp/2020_05_24_09_17_53.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    creation_time   : 2020-05-24T08:18:02.000000Z
  Duration: 00:00:01.64, start: 0.000000, bitrate: 20750 kb/s
    Stream #0:0(eng): Video: h264 (avc1 / 0x31637661), yuv420p, 1920x1080, 18056 kb/s, SAR 1:1 DAR 16:9, 29.70 fps, 29.67 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      creation_time   : 2020-05-24T08:18:02.000000Z
      handler_name    : VideoHandle
    Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 155 kb/s (default)
    Metadata:
      creation_time   : 2020-05-24T08:18:02.000000Z
      handler_name    : SoundHandle
Input #1, png_pipe, from '/storage/emulated/0/Android/data/com.my.package/files/MyVideos/tempShapes.png':
  Duration: N/A, bitrate: N/A
    Stream #1:0: Video: png, rgba(pc), 1920x1128, 25 tbr, 25 tbn, 25 tbc
Stream mapping:
  Stream #0:0 (h264) -> scale (graph 0)
  Stream #1:0 (png) -> scale2ref:default (graph 0)
  overlay (graph 0) -> Stream #0:0 (libx264)
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
frame=    0 fps=0.0 q=0.0 size=       0kB time=-577014:32:22.77 bitrate=  -0.0kbits/s speed=N/A    
frame=    0 fps=0.0 q=0.0 size=       0kB time=-577014:32:22.77 bitrate=  -0.0kbits/s speed=N/A    
[libx264 @ 0xb83fc8a0] using SAR=1/1
[libx264 @ 0xb83fc8a0] using cpu capabilities: ARMv6 NEON
[libx264 @ 0xb83fc8a0] profile Constrained Baseline, level 4.2
[libx264 @ 0xb83fc8a0] 264 - core 152 r2851M ba24899 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=2 keyint_min=1 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
Output #0, mp4, to '/storage/emulated/0/Android/data/com.my.package/files/MyVideos/video with line.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    encoder         : Lavf58.12.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1920x1128 [SAR 1:1 DAR 80:47], q=-1--1, 29 fps, 14848 tbn, 29 tbc (default)
    Metadata:
      encoder         : Lavc58.18.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      creation_time   : 2020-05-24T08:18:02.000000Z
      handler_name    : SoundHandle
      encoder         : Lavc58.18.100 aac
frame=    1 fps=0.4 q=0.0 size=       0kB time=00:00:01.01 bitrate=   0.4kbits/s speed=0.397x    
frame=    5 fps=1.6 q=0.0 size=       0kB time=00:00:01.01 bitrate=   0.4kbits/s speed=0.33x    
frame=    9 fps=2.5 q=24.0 size=     256kB time=00:00:01.01 bitrate=2075.0kbits/s speed=0.28x    
frame=   13 fps=3.1 q=25.0 size=    1024kB time=00:00:01.01 bitrate=8298.9kbits/s speed=0.243x    
frame=   18 fps=3.8 q=29.0 size=    2048kB time=00:00:01.01 bitrate=16597.5kbits/s speed=0.214x    
frame=   21 fps=3.9 q=25.0 size=    2560kB time=00:00:01.01 bitrate=20746.7kbits/s speed=0.19x    
frame=   23 fps=3.9 q=25.0 size=    2816kB time=00:00:01.01 bitrate=22821.4kbits/s speed=0.173x    
frame=   26 fps=4.0 q=29.0 size=    3584kB time=00:00:01.01 bitrate=29045.3kbits/s speed=0.156x    
Past duration 0.617577 too large
Past duration 0.639641 too large
frame=   28 fps=3.9 q=29.0 size=    3840kB time=00:00:01.01 bitrate=31119.9kbits/s speed=0.142x    
Past duration 0.665230 too large
frame=   29 fps=3.8 q=25.0 size=    3840kB time=00:00:01.01 bitrate=31119.9kbits/s speed=0.132x    
Past duration 0.690834 too large
Past duration 0.711281 too large
Past duration 0.736885 too large
frame=   32 fps=3.9 q=29.0 size=    4608kB time=00:00:01.01 bitrate=37343.8kbits/s speed=0.123x    
Past duration 0.762474 too large
Past duration 0.783577 too large
Past duration 0.807564 too large
frame=   35 fps=3.9 q=25.0 size=    4864kB time=00:00:01.01 bitrate=39418.4kbits/s speed=0.112x    
Past duration 0.831551 too large
Past duration 0.855537 too large
frame=   37 fps=3.5 q=25.0 size=    5376kB time=00:00:01.01 bitrate=43567.7kbits/s speed=0.0968x    
Past duration 0.879524 too large
Past duration 0.903511 too large
frame=   39 fps=3.4 q=25.0 size=    5376kB time=00:00:01.06 bitrate=41196.6kbits/s speed=0.0927x    
Past duration 0.927498 too large
Past duration 0.951500 too large
frame=   41 fps=3.4 q=25.0 size=    5376kB time=00:00:01.13 bitrate=38700.0kbits/s speed=0.0931x    
frame=   41 fps=3.2 q=25.0 size=    5376kB time=00:00:01.13 bitrate=38700.0kbits/s speed=0.0886x    
frame=   41 fps=3.1 q=25.0 size=    5888kB time=00:00:01.43 bitrate=33554.2kbits/s speed=0.108x    
Past duration 0.975487 too large
frame=   45 fps=3.2 q=26.0 size=    6656kB time=00:00:01.60 bitrate=33905.4kbits/s speed=0.114x    
frame=   45 fps=3.0 q=-1.0 Lsize=    8158kB time=00:00:01.65 bitrate=40480.7kbits/s speed=0.11x    
video:8127kB audio:28kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.032895%
[libx264 @ 0xb83fc8a0] frame I:23    Avg QP:24.70  size:337646
[libx264 @ 0xb83fc8a0] frame P:22    Avg QP:29.00  size: 25250
[libx264 @ 0xb83fc8a0] mb I  I16..4: 100.0%  0.0%  0.0%
[libx264 @ 0xb83fc8a0] mb P  I16..4:  0.4%  0.0%  0.0%  P16..4: 43.6%  0.0%  0.0%  0.0%  0.0%    skip:56.0%
[libx264 @ 0xb83fc8a0] coded y,uvDC,uvAC intra: 90.0% 84.7% 58.1% inter: 20.1% 6.2% 0.1%
[libx264 @ 0xb83fc8a0] i16 v,h,dc,p: 25% 28% 28% 20%
[libx264 @ 0xb83fc8a0] i8c dc,h,v,p: 39% 25% 20% 16%
[libx264 @ 0xb83fc8a0] kb/s:42901.20
[aac @ 0xb83d7d10] Qavg: 3517.779


  


• Problem using FFmpeg to convert MKV with A/52 B audio (aka E-AC3) to AAC

  5 juillet 2020, par nxl4

  I've got a number of MKV files which are (per VLC) encoded with A/52 B (aka E-AC3) audio codecs. I would like to convert these to AAC, but I'm having trouble doing this with FFmpeg. The command I'm running is :

  



  ffmpeg -hwaccel auto -i original_file.mkv -y -c:v copy -c:a aac output_file.mkv


  



  The command completes without error. However, the generated file has no audio when I play it. FFmpeg's output is as follows :

  



  ffmpeg version 4.2.2-1ubuntu1 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.3.0-3ubuntu1)
  configuration: --prefix=/usr --extra-version=1ubuntu1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Guessed Channel Layout for Input Stream #0.1 : 5.1
Input #0, matroska,webm, from 'input_file.mkv':
  Metadata:
    encoder         : libebml v1.3.5 + libmatroska v1.4.8
    creation_time   : 2018-05-10T10:21:30.000000Z
  Duration: 00:42:08.15, start: 0.000000, bitrate: 3201 kb/s
    Stream #0:0: Video: h264 (High), yuv420p(tv, bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
    Metadata:
      BPS-eng         : 2559028
      DURATION-eng    : 00:42:08.151000000
      NUMBER_OF_FRAMES-eng: 60615
      NUMBER_OF_BYTES-eng: 808701337
      _STATISTICS_WRITING_APP-eng: mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2018-05-10 10:21:30
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:1(eng): Audio: eac3, 48000 Hz, 5.1, fltp (default)
    Metadata:
      BPS-eng         : 640000
      DURATION-eng    : 00:42:08.096000000
      NUMBER_OF_FRAMES-eng: 79003
      NUMBER_OF_BYTES-eng: 202247680
      _STATISTICS_WRITING_APP-eng: mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2018-05-10 10:21:30
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:2(eng): Subtitle: subrip
    Metadata:
      BPS-eng         : 79
      DURATION-eng    : 00:41:15.299000000
      NUMBER_OF_FRAMES-eng: 802
      NUMBER_OF_BYTES-eng: 24598
      _STATISTICS_WRITING_APP-eng: mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2018-05-10 10:21:30
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:3(eng): Subtitle: subrip
    Metadata:
      title           : SDH
      BPS-eng         : 82
      DURATION-eng    : 00:41:15.299000000
      NUMBER_OF_FRAMES-eng: 844
      NUMBER_OF_BYTES-eng: 25598
      _STATISTICS_WRITING_APP-eng: mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2018-05-10 10:21:30
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (eac3 (native) -> aac (native))
  Stream #0:2 -> #0:2 (subrip (srt) -> ass (ssa))
Press [q] to stop, [?] for help
[aac @ 0x55d0572a1740] Using a PCE to encode channel layout "5.1(side)"
Output #0, matroska, to 'output_file.mkv':
  Metadata:
    encoder         : Lavf58.29.100
    Stream #0:0: Video: h264 (High) (H264 / 0x34363248), yuv420p(tv, bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 23.98 fps, 23.98 tbr, 1k tbn, 1k tbc (default)
    Metadata:
      BPS-eng         : 2559028
      DURATION-eng    : 00:42:08.151000000
      NUMBER_OF_FRAMES-eng: 60615
      NUMBER_OF_BYTES-eng: 808701337
      _STATISTICS_WRITING_APP-eng: mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2018-05-10 10:21:30
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:1(eng): Audio: aac (LC) ([255][0][0][0] / 0x00FF), 48000 Hz, 5.1(side), fltp, 394 kb/s (default)
    Metadata:
      BPS-eng         : 640000
      DURATION-eng    : 00:42:08.096000000
      NUMBER_OF_FRAMES-eng: 79003
      NUMBER_OF_BYTES-eng: 202247680
      _STATISTICS_WRITING_APP-eng: mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2018-05-10 10:21:30
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      encoder         : Lavc58.54.100 aac
    Stream #0:2(eng): Subtitle: ass (ssa)
    Metadata:
      BPS-eng         : 79
      DURATION-eng    : 00:41:15.299000000
      NUMBER_OF_FRAMES-eng: 802
      NUMBER_OF_BYTES-eng: 24598
      _STATISTICS_WRITING_APP-eng: mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2018-05-10 10:21:30
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      encoder         : Lavc58.54.100 ssa 
video:789747kB audio:121419kB subtitle:41kB other streams:0kB global headers:1kB muxing overhead: 0.142563%
[aac @ 0x55d0572a1740] Qavg: 428.063


  



  Any ideas what I'm doing wrong here ? In case it helps an ffprobe -show_streams command run on the original file shows the following :

  



  DL.DDP5.1.H.264-NTG.mkv
ffprobe version 4.2.2-1ubuntu1 Copyright (c) 2007-2019 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.3.0-3ubuntu1)
  configuration: --prefix=/usr --extra-version=1ubuntu1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, matroska,webm, from 'input_file.mkv':
  Metadata:
    encoder         : libebml v1.3.5 + libmatroska v1.4.8
    creation_time   : 2018-05-10T10:21:30.000000Z
  Duration: 00:42:08.15, start: 0.000000, bitrate: 3201 kb/s
    Stream #0:0: Video: h264 (High), yuv420p(tv, bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
    Metadata:
      BPS-eng         : 2559028
      DURATION-eng    : 00:42:08.151000000
      NUMBER_OF_FRAMES-eng: 60615
      NUMBER_OF_BYTES-eng: 808701337
      _STATISTICS_WRITING_APP-eng: mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2018-05-10 10:21:30
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:1(eng): Audio: eac3, 48000 Hz, 6 channels, fltp (default)
    Metadata:
      BPS-eng         : 640000
      DURATION-eng    : 00:42:08.096000000
      NUMBER_OF_FRAMES-eng: 79003
      NUMBER_OF_BYTES-eng: 202247680
      _STATISTICS_WRITING_APP-eng: mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2018-05-10 10:21:30
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:2(eng): Subtitle: subrip
    Metadata:
      BPS-eng         : 79
      DURATION-eng    : 00:41:15.299000000
      NUMBER_OF_FRAMES-eng: 802
      NUMBER_OF_BYTES-eng: 24598
      _STATISTICS_WRITING_APP-eng: mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2018-05-10 10:21:30
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:3(eng): Subtitle: subrip
    Metadata:
      title           : SDH
      BPS-eng         : 82
      DURATION-eng    : 00:41:15.299000000
      NUMBER_OF_FRAMES-eng: 844
      NUMBER_OF_BYTES-eng: 25598
      _STATISTICS_WRITING_APP-eng: mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2018-05-10 10:21:30
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
[STREAM]
index=0
codec_name=h264
codec_long_name=H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
profile=High
codec_type=video
codec_time_base=1001/48000
codec_tag_string=[0][0][0][0]
codec_tag=0x0000
width=1280
height=720
coded_width=1280
coded_height=720
has_b_frames=2
sample_aspect_ratio=1:1
display_aspect_ratio=16:9
pix_fmt=yuv420p
level=31
color_range=tv
color_space=bt709
color_transfer=bt709
color_primaries=bt709
chroma_location=left
field_order=progressive
timecode=N/A
refs=1
is_avc=true
nal_length_size=4
id=N/A
r_frame_rate=24000/1001
avg_frame_rate=24000/1001
time_base=1/1000
start_pts=0
start_time=0.000000
duration_ts=N/A
duration=N/A
bit_rate=N/A
max_bit_rate=N/A
bits_per_raw_sample=8
nb_frames=N/A
nb_read_frames=N/A
nb_read_packets=N/A
DISPOSITION:default=1
DISPOSITION:dub=0
DISPOSITION:original=0
DISPOSITION:comment=0
DISPOSITION:lyrics=0
DISPOSITION:karaoke=0
DISPOSITION:forced=0
DISPOSITION:hearing_impaired=0
DISPOSITION:visual_impaired=0
DISPOSITION:clean_effects=0
DISPOSITION:attached_pic=0
DISPOSITION:timed_thumbnails=0
TAG:BPS-eng=2559028
TAG:DURATION-eng=00:42:08.151000000
TAG:NUMBER_OF_FRAMES-eng=60615
TAG:NUMBER_OF_BYTES-eng=808701337
TAG:_STATISTICS_WRITING_APP-eng=mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
TAG:_STATISTICS_WRITING_DATE_UTC-eng=2018-05-10 10:21:30
TAG:_STATISTICS_TAGS-eng=BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
[/STREAM]
[STREAM]
index=1
codec_name=eac3
codec_long_name=ATSC A/52B (AC-3, E-AC-3)
profile=unknown
codec_type=audio
codec_time_base=1/48000
codec_tag_string=[0][0][0][0]
codec_tag=0x0000
sample_fmt=fltp
sample_rate=48000
channels=6
channel_layout=unknown
bits_per_sample=0
dmix_mode=-1
ltrt_cmixlev=-1.000000
ltrt_surmixlev=-1.000000
loro_cmixlev=-1.000000
loro_surmixlev=-1.000000
id=N/A
r_frame_rate=0/0
avg_frame_rate=0/0
time_base=1/1000
start_pts=0
start_time=0.000000
duration_ts=N/A
duration=N/A
bit_rate=N/A
max_bit_rate=N/A
bits_per_raw_sample=N/A
nb_frames=N/A
nb_read_frames=N/A
nb_read_packets=N/A
DISPOSITION:default=1
DISPOSITION:dub=0
DISPOSITION:original=0
DISPOSITION:comment=0
DISPOSITION:lyrics=0
DISPOSITION:karaoke=0
DISPOSITION:forced=0
DISPOSITION:hearing_impaired=0
DISPOSITION:visual_impaired=0
DISPOSITION:clean_effects=0
DISPOSITION:attached_pic=0
DISPOSITION:timed_thumbnails=0
TAG:language=eng
TAG:BPS-eng=640000
TAG:DURATION-eng=00:42:08.096000000
TAG:NUMBER_OF_FRAMES-eng=79003
TAG:NUMBER_OF_BYTES-eng=202247680
TAG:_STATISTICS_WRITING_APP-eng=mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
TAG:_STATISTICS_WRITING_DATE_UTC-eng=2018-05-10 10:21:30
TAG:_STATISTICS_TAGS-eng=BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
[/STREAM]
[STREAM]
index=2
codec_name=subrip
codec_long_name=SubRip subtitle
profile=unknown
codec_type=subtitle
codec_time_base=0/1
codec_tag_string=[0][0][0][0]
codec_tag=0x0000
width=N/A
height=N/A
id=N/A
r_frame_rate=0/0
avg_frame_rate=0/0
time_base=1/1000
start_pts=0
start_time=0.000000
duration_ts=2528151
duration=2528.151000
bit_rate=N/A
max_bit_rate=N/A
bits_per_raw_sample=N/A
nb_frames=N/A
nb_read_frames=N/A
nb_read_packets=N/A
DISPOSITION:default=0
DISPOSITION:dub=0
DISPOSITION:original=0
DISPOSITION:comment=0
DISPOSITION:lyrics=0
DISPOSITION:karaoke=0
DISPOSITION:forced=0
DISPOSITION:hearing_impaired=0
DISPOSITION:visual_impaired=0
DISPOSITION:clean_effects=0
DISPOSITION:attached_pic=0
DISPOSITION:timed_thumbnails=0
TAG:language=eng
TAG:BPS-eng=79
TAG:DURATION-eng=00:41:15.299000000
TAG:NUMBER_OF_FRAMES-eng=802
TAG:NUMBER_OF_BYTES-eng=24598
TAG:_STATISTICS_WRITING_APP-eng=mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
TAG:_STATISTICS_WRITING_DATE_UTC-eng=2018-05-10 10:21:30
TAG:_STATISTICS_TAGS-eng=BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
[/STREAM]
[STREAM]
index=3
codec_name=subrip
codec_long_name=SubRip subtitle
profile=unknown
codec_type=subtitle
codec_time_base=0/1
codec_tag_string=[0][0][0][0]
codec_tag=0x0000
width=N/A
height=N/A
id=N/A
r_frame_rate=0/0
avg_frame_rate=0/0
time_base=1/1000
start_pts=0
start_time=0.000000
duration_ts=2528151
duration=2528.151000
bit_rate=N/A
max_bit_rate=N/A
bits_per_raw_sample=N/A
nb_frames=N/A
nb_read_frames=N/A
nb_read_packets=N/A
DISPOSITION:default=0
DISPOSITION:dub=0
DISPOSITION:original=0
DISPOSITION:comment=0
DISPOSITION:lyrics=0
DISPOSITION:karaoke=0
DISPOSITION:forced=0
DISPOSITION:hearing_impaired=0
DISPOSITION:visual_impaired=0
DISPOSITION:clean_effects=0
DISPOSITION:attached_pic=0
DISPOSITION:timed_thumbnails=0
TAG:language=eng
TAG:title=SDH
TAG:BPS-eng=82
TAG:DURATION-eng=00:41:15.299000000
TAG:NUMBER_OF_FRAMES-eng=844
TAG:NUMBER_OF_BYTES-eng=25598
TAG:_STATISTICS_WRITING_APP-eng=mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
TAG:_STATISTICS_WRITING_DATE_UTC-eng=2018-05-10 10:21:30
TAG:_STATISTICS_TAGS-eng=BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
[/STREAM]