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• Picture in picture problem on output stream in FFMPEG

  7 mai 2020, par mat thew

  I have a problem with ffmpeg output video.

  



  I am using Raspberry Pi to connect video (stream with IP camera) and audio. Its work fine.
I would like to add to my output video another video with second camera (in left-top side).

  



  Graphics it is looks like :

  



  _________________
| |_2_|         |
|               |
|        1      |
|_______________|


  



  1 is head video, 2 is video to add

  



  that is my code to situation with top :

  



  /home/pi/FFmpeg/ffmpeg -y -thread_queue_size 512K \
-re -vsync 1 -rtsp_transport tcp -itsoffset 0 -use_wallclock_as_timestamps 1 \
-i "rtsp://admin:admin@172.16.7.7:554/cam/realmonitor?channel=1&subtype=0" \
-thread_queue_size 512K -i "rtsp://video:video@172.16.7.8:554/cam/realmonitor?channel=1&subtype=0" \
-filter_complex "[1]scale=iw/3:ih/3 [pip]; [0][pip] overlay=3:3" \
-ar 44100 -itsoffset 1.5 -ac 2 -f alsa -ac 2 -thread_queue_size 512K -i default -f h264 \
-c:a aac -ab 128k -g 50 -strict -2 -f flv rtmp://127.0.0.1/sesja/transmisja


  



  Stream is running, however number of fps is 4-5, speed is 0.3 what makes it output stream does not work properly.

  



  I am asking from help in configuration, maybe Raspberry does not support this solution in hardware.

  



  FULL LOG :

  



  ffmpeg version N-92540-g28c96c2ce2 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 6.3.0 (Raspbian 6.3.0-18+rpi1+deb9u1) 20170516
  configuration: --arch=armel --target-os=linux --enable-gpl --enable-omx --enable-omx-rpi --enable-nonfree --enable-indev=alsa --enable-outdev=alsa
  libavutil      56. 24.101 / 56. 24.101
  libavcodec     58. 40.100 / 58. 40.100
  libavformat    58. 23.100 / 58. 23.100
  libavdevice    58.  6.100 / 58.  6.100
  libavfilter     7. 46.100 /  7. 46.100
  libswscale      5.  4.100 /  5.  4.100
  libswresample   3.  4.100 /  3.  4.100
  libpostproc    55.  4.100 / 55.  4.100
Input #0, rtsp, from 'rtsp://admin:admin@172.16.7.7:554/cam/realmonitor?channel=1&subtype=0':
  Metadata:
    title           : RTSP Session/2.0
  Duration: N/A, start: 1588833830.370000, bitrate: N/A
    Stream #0:0: Video: h264 (High), yuvj420p(pc, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 20 fps, 20 tbr, 90k tbn, 40 tbc
[rtsp @ 0x31cc480] max delay reached. need to consume packet
[rtsp @ 0x31cc480] RTP: missed 35 packets
[rtsp @ 0x31cc480] max delay reached. need to consume packet
[rtsp @ 0x31cc480] RTP: missed 7 packets
[h264 @ 0x31e4180] concealing 3081 DC, 3081 AC, 3081 MV errors in I frame
[rtsp @ 0x31cc480] max delay reached. need to consume packet
[rtsp @ 0x31cc480] RTP: missed 34 packets
[h264 @ 0x31e4180] error while decoding MB 30 1, bytestream -11
[h264 @ 0x31e4180] concealing 3539 DC, 3539 AC, 3539 MV errors in P frame
[rtsp @ 0x31cc480] max delay reached. need to consume packet
[rtsp @ 0x31cc480] RTP: missed 13 packets
Input #1, rtsp, from 'rtsp://video:video@172.16.7.8:554/cam/realmonitor?channel=1&subtype=0':
  Metadata:
    title           : RTSP Session/2.0
  Duration: N/A, start: 0.430000, bitrate: N/A
    Stream #1:0: Video: h264 (High), yuvj420p(pc, bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], 20 fps, 100 tbr, 90k tbn, 40 tbc
Guessed Channel Layout for Input Stream #2.0 : stereo
Input #2, alsa, from 'default':
  Duration: N/A, start: 1588833833.133715, bitrate: 1411 kb/s
    Stream #2:0: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
Stream mapping:
  Stream #0:0 (h264) -> overlay:main (graph 0)
  Stream #1:0 (h264) -> scale (graph 0)
  overlay (graph 0) -> Stream #0:0 (flv)
  Stream #2:0 -> #0:1 (pcm_s16le (native) -> aac (native))
Press [q] to stop, [?] for help
[h264 @ 0x3389140] concealing 3081 DC, 3081 AC, 3081 MV errors in I frame
[rtsp @ 0x31cc480] max delay reached. need to consume packet
[rtsp @ 0x31cc480] RTP: missed 51 packets
[swscaler @ 0x3b3b6f0] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x3b56cf0] deprecated pixel format used, make sure you did set range correctly
Output #0, flv, to 'rtmp://127.0.0.1/sesja/transmisja':
  Metadata:
    title           : RTSP Session/2.0
    encoder         : Lavf58.23.100
    Stream #0:0: Video: flv1 (flv) ([2][0][0][0] / 0x0002), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 20 fps, 1k tbn, 20 tbc (default)
    Metadata:
      encoder         : Lavc58.40.100 flv
    Side data:
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
    Stream #0:1: Audio: aac (LC) ([10][0][0][0] / 0x000A), 44100 Hz, stereo, fltp, 128 kb/s
    Metadata:
      encoder         : Lavc58.40.100 aac
frame=    0 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   [h264 @ 0x3831c40] error while decoding MB 30 1, bytestream -11
[h264 @ 0x3831c40] concealing 3539 DC, 3539 AC, 3539 MV errors in P frame
frame=    2 fps=1.5 q=2.0 size=       0kB time=00:00:00.05 bitrate=  57.9kbits/s[h264 @ 0x384a1a0] error while decoding MB 64 6, bytestream -13
[h264 @ 0x384a1a0] concealing 3105 DC, 3105 AC, 3105 MV errors in P frame
frame=    6 fps=2.8 q=7.0 size=     265kB time=00:00:01.50 bitrate=1447.5kbits/sframe=    9 fps=3.3 q=15.5 size=     270kB time=00:00:01.50 bitrate=1472.7kbits/frame=   13 fps=3.7 q=26.4 size=     274kB time=00:00:01.50 bitrate=1496.4kbits/frame=   15 fps=3.6 q=30.2 size=     276kB time=00:00:01.50 bitrate=1507.6kbits/frame=   17 fps=3.6 q=31.0 size=     278kB time=00:00:01.50 bitrate=1518.9kbits/frame=   20 fps=3.6 q=31.0 size=     284kB time=00:00:01.50 bitrate=1551.1kbits/[h264 @ 0x3389140] error while decoding MB 42 4, bytestream -5
[h264 @ 0x3389140] concealing 3287 DC, 3287 AC, 3287 MV errors in P frame
frame=   23 fps=3.7 q=31.0 size=     287kB time=00:00:01.50 bitrate=1568.5kbits/frame=   24 fps=3.6 q=31.0 size=     288kB time=00:00:01.50 bitrate=1574.1kbits/frame=   60 fps=5.7 q=31.0 size=     295kB time=00:00:02.95 bitrate= 817.9kbits/frame=   62 fps=5.5 q=31.0 size=     418kB time=00:00:03.05 bitrate=1121.3kbits/frame=   62 fps=5.2 q=31.0 size=     419kB time=00:00:03.07 bitrate=1114.9kbits/frame=   62 fps=5.0 q=31.0 size=     419kB time=00:00:03.07 bitrate=1114.9kbits/frame=   62 fps=4.8 q=31.0 size=     419kB time=00:00:03.07 bitrate=1114.9kbits/frame=   62 fps=4.6 q=31.0 size=     419kB time=00:00:03.07 bitrate=1114.9kbits/frame=   62 fps=4.4 q=31.0 size=     419kB time=00:00:03.07 bitrate=1114.9kbits/frame=   62 fps=4.2 q=31.0 size=     419kB time=00:00:03.07 bitrate=1114.9kbits/frame=   63 fps=4.1 q=31.0 size=     419kB time=00:00:03.10 bitrate=1108.0kbits/frame=   65 fps=4.0 q=31.0 size=     424kB time=00:00:03.20 bitrate=1084.3kbits/frame=   68 fps=4.0 q=31.0 size=     429kB time=00:00:03.35 bitrate=1049.4kbits/frame=   71 fps=4.0 q=31.0 size=     435kB time=00:00:03.50 bitrate=1017.3kbits/frame=   74 fps=4.1 q=31.0 size=     441kB time=00:00:03.65 bitrate= 988.5kbits/frame=   77 fps=4.1 q=31.0 size=     446kB time=00:00:03.80 bitrate= 961.0kbits/frame=   80 fps=4.1 q=31.0 size=     452kB time=00:00:03.95 bitrate= 936.5kbits/frame=   83 fps=4.1 q=31.0 size=     457kB time=00:00:04.10 bitrate= 913.1kbits/frame=   85 fps=4.1 q=31.0 size=     461kB time=00:00:04.21 bitrate= 896.4kbits/frame=   88 fps=4.1 q=31.0 size=     467kB time=00:00:04.35 bitrate= 878.6kbits/frame=   91 fps=4.1 q=31.0 size=     473kB time=00:00:04.50 bitrate= 860.1kbits/[flv @ 0x37246b0] Failed to update header with correct duration.
[flv @ 0x37246b0] Failed to update header with correct filesize.
frame=   93 fps=4.0 q=31.0 Lsize=     478kB time=00:00:04.63 bitrate= 844.7kbits/s dup=38 drop=36 speed=0.202x    
video:425kB audio:49kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.859331%
[aac @ 0x3268610] Qavg: 185.380
Exiting normally, received signal 2.


  



  Thanks

  


• How do I change audio language using ffmpeg in video files contaning two or more audio tracks

  19 mai 2020, par warezsoftwarez

  I am transcoding video files, that contain 2 audio tracks - Polish and English. Unfortunately my transcoder messes somehow with metadata, and at the output, when I'm checking video file using MediaInfo, i see that both audio tracks are described as English. I'd like to change description of 1st audio track to Polish, so accordingly to ffmpeg documentation :

  



  To set the language of the first audio stream:
ffmpeg -i INPUT -metadata:s:a:0 language=eng OUTPUT


  



  Unfortunately, running command :

  



  ffmpeg -i INPUTPATH -metadata:s:a:0 language=pol OUTPUTPATH


  



  to overwrite input file resulted in saving file thats size is 63KB but it is described as Polish audio (no second audio track - English somehow was deleted)

  



  When I used this command, to save output file as another file, to avoid overwriting if something misses (which is current situation), but using parameter -metadata:s:a:4 because I thought that maybe I'm reading metadata from ffmpeg incorrectly, it resulted in saving output file as 800Mb with only English (no Polish track).

  



  I don't know what should I change in this command to run as I want it to - just changing metadata of first audio track language to Polish.

  



  Here is full ffmpeg output :

  



  C:\Users\user>ffmpeg -i F:\Path\33244813_6000_1_trailer.mp4 -metadata:s:a:4 language=pol F:\Path\testtest.mp4
ffmpeg version N-91931-gb69ea742ab Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 8.2.1 (GCC) 20180813
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enabl
e-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amr
wb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enab
le-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --
enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc -
-enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --e
nable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth
  libavutil      56. 19.101 / 56. 19.101
  libavcodec     58. 30.100 / 58. 30.100
  libavformat    58. 18.100 / 58. 18.100
  libavdevice    58.  4.103 / 58.  4.103
  libavfilter     7. 29.100 /  7. 29.100
  libswscale      5.  2.100 /  5.  2.100
  libswresample   3.  2.100 /  3.  2.100
  libpostproc    55.  2.100 / 55.  2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'F:\Path\33244813_6000_1_trailer.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 1
    compatible_brands: isom
    creation_time   : 2020-04-22T16:18:04.000000Z
  Duration: 00:40:39.12, start: 0.000000, bitrate: 8848 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], Closed C
aptions, 5068 kb/s, 25 fps, 25 tbr, 120k tbn, 50 tbc (default)
    Metadata:
      creation_time   : 2020-04-22T16:18:04.000000Z
      handler_name    : Video
    Stream #0:1(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], Closed C
aptions, 1857 kb/s, 25 fps, 25 tbr, 120k tbn, 50 tbc (default)
    Metadata:
      creation_time   : 2020-04-22T16:18:04.000000Z
      handler_name    : Video
    Stream #0:2(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], Closed Ca
ptions, 902 kb/s, 25 fps, 25 tbr, 120k tbn, 50 tbc (default)
    Metadata:
      creation_time   : 2020-04-22T16:18:04.000000Z
      handler_name    : Video
    Stream #0:3(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 640x480 [SAR 4:3 DAR 16:9], Closed Cap
tions, 628 kb/s, 25 fps, 25 tbr, 120k tbn, 50 tbc (default)
    Metadata:
      creation_time   : 2020-04-22T16:18:04.000000Z
      handler_name    : Video
    Stream #0:4(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 125 kb/s (default)
    Metadata:
      creation_time   : 2020-04-22T16:18:04.000000Z
      handler_name    : Sound
    Stream #0:5(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 253 kb/s (default)
    Metadata:
      creation_time   : 2020-04-22T16:18:04.000000Z
      handler_name    : Sound
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:5 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 00000012bef91f80] using SAR=1/1
[libx264 @ 00000012bef91f80] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 00000012bef91f80] profile High, level 4.0, 4:2:0, 8-bit
[libx264 @ 00000012bef91f80] 264 - core 157 r2932 303c484 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.vid
eolan.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=34 looka
head_threads=5 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_lookah
ead=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
Output #0, mp4, to 'F:\Path\testtest.mp4'
:
  Metadata:
    major_brand     : isom
    minor_version   : 1
    compatible_brands: isom
    encoder         : Lavf58.18.100
    Stream #0:0(und): Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps,
 12800 tbn, 25 tbc (default)
    Metadata:
      creation_time   : 2020-04-22T16:18:04.000000Z
      handler_name    : Video
      encoder         : Lavc58.30.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 341 kb/s (default)
    Metadata:
      creation_time   : 2020-04-22T16:18:04.000000Z
      handler_name    : Sound
      encoder         : Lavc58.30.100 aac
frame=60981 fps= 84 q=-1.0 Lsize=  816313kB time=00:40:39.12 bitrate=2741.7kbits/s dup=3 drop=0 speed=3.36x
video:713292kB audio:101322kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.208512%
[libx264 @ 00000012bef91f80] frame I:769   Avg QP:16.36  size: 46713
[libx264 @ 00000012bef91f80] frame P:37125 Avg QP:19.81  size: 15059
[libx264 @ 00000012bef91f80] frame B:23087 Avg QP:21.11  size:  5866
[libx264 @ 00000012bef91f80] consecutive B-frames: 40.4% 24.0% 10.2% 25.5%
[libx264 @ 00000012bef91f80] mb I  I16..4: 40.3% 58.0%  1.7%
[libx264 @ 00000012bef91f80] mb P  I16..4:  6.2% 12.5%  0.1%  P16..4: 29.8%  3.7%  2.7%  0.0%  0.0%    skip:45.0%
[libx264 @ 00000012bef91f80] mb B  I16..4:  1.0%  1.7%  0.0%  B16..8: 27.9%  1.1%  0.1%  direct: 2.0%  skip:66.2%  L0:49
.4% L1:49.3% BI: 1.3%
[libx264 @ 00000012bef91f80] 8x8 transform intra:65.3% inter:95.1%
[libx264 @ 00000012bef91f80] coded y,uvDC,uvAC intra: 24.7% 39.7% 3.2% inter: 7.0% 14.6% 0.0%
[libx264 @ 00000012bef91f80] i16 v,h,dc,p: 34% 26% 13% 28%
[libx264 @ 00000012bef91f80] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 25% 15% 41%  3%  3%  4%  3%  3%  2%
[libx264 @ 00000012bef91f80] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 32% 25% 20%  3%  6%  5%  4%  3%  2%
[libx264 @ 00000012bef91f80] i8c dc,h,v,p: 58% 19% 20%  3%
[libx264 @ 00000012bef91f80] Weighted P-Frames: Y:0.1% UV:0.0%
[libx264 @ 00000012bef91f80] ref P L0: 72.2%  6.3% 15.8%  5.7%  0.0%
[libx264 @ 00000012bef91f80] ref B L0: 86.6% 11.5%  1.9%
[libx264 @ 00000012bef91f80] ref B L1: 97.6%  2.4%
[libx264 @ 00000012bef91f80] kb/s:2395.53
[aac @ 00000012bef93b00] Qavg: 471.415


  


• 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]