Capturing audio + video : issues with transcoding to mp4

[olberger]

Trying to capture VIDEO=true and AUDIO=true, without setting VIDEO_FILE_EXTENSION, I get "Conversion from mkv to mp4 FAILED!".

video-rec: stopped
Waiting for video to stop recording...
video-rec                        STOPPED   May 02 11:56 PM
Done waiting for video recording to stop.
Video recording stopped
--LOG 23:56:08:920508761 -- DEBUG: video-rec-stdout.log ----
[matroska @ 0xe3a780] Non-monotonous DTS in output stream 0:1; previous: 32108, current: 32098; changing to 32108. This may result in incorrect timestamps in the output file.
frame=  786 fps= 25 q=12.0 size=    8460kB time=00:00:32.55 bitrate=2128.5kbits/s    
--LOG 23:55:59:105785670 Trapped SIGTERM or SIGINT so shutting down ffmpeg gracefully...
--LOG 23:55:59:108749290 Will kill VID_TOOL_PID=602 ...
frame=  787 fps= 25 q=-1.0 Lsize=    8495kB time=00:00:32.79 bitrate=2122.1kbits/s    
video:2713kB audio:5770kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.127703%
[libx264 @ 0xe3be60] frame I:4     Avg QP:12.75  size: 91980
[libx264 @ 0xe3be60] frame P:783   Avg QP:13.95  size:  3078
[libx264 @ 0xe3be60] mb I  I16..4: 100.0%  0.0%  0.0%
[libx264 @ 0xe3be60] mb P  I16..4:  0.8%  0.0%  0.0%  P16..4:  5.2%  0.0%  0.0%  0.0%  0.0%    skip:94.0%
[libx264 @ 0xe3be60] coded y,u,v intra: 17.2% 6.0% 6.1% inter: 2.9% 0.3% 0.4%
[libx264 @ 0xe3be60] i16 v,h,dc,p: 71% 22%  3%  4%
[libx264 @ 0xe3be60] kb/s:677.69
Exiting normally, received signal 2.
--LOG 23:56:00:113074916 Tried to kill -SIGTERM VID_TOOL_PID=602
--LOG 23:56:00:116045085 Waiting up to 6s for VID_TOOL_PID=602 to end with SIGTERM...
--LOG 23:56:00:121532331 wait_pid successfully managed to SIGTERM:VID_TOOL_PID=602 within less than 6s
--LOG 23:56:00:124471604 Will try to fix the videos...
--LOG 23:56:00:632576487 Fixing perms for /home/seluser/videos/vid_chrome_25550_firefox_25551.mkv*
--LOG 23:56:00:640358217 Changing video encoding from mkv to mp4...
--LOG 23:56:00:684710206 Conversion from mkv to mp4 FAILED! in within the 20s
--LOG 23:56:00:689320665 Optimizing /home/seluser/videos/vid_chrome_25550_firefox_25551.mp4 for HTTP streaming...
Error opening file /home/seluser/videos/vid_chrome_25550_firefox_25551.mp4: Invalid IsoMedia File
--LOG 23:56:00:698305142 MP4Box got errors meaning the mp4 video file is corrupted, trying again...
Error opening file /home/seluser/videos/vid_chrome_25550_firefox_25551.mp4: Invalid IsoMedia File
--LOG 23:56:01:705475517 MP4Box got errors meaning the mp4 video file is corrupted, trying again...
Error opening file /home/seluser/videos/vid_chrome_25550_firefox_25551.mp4: Invalid IsoMedia File
--LOG 23:56:02:712680879 MP4Box got errors meaning the mp4 video file is corrupted, trying again...
Error opening file /home/seluser/videos/vid_chrome_25550_firefox_25551.mp4: Invalid IsoMedia File
--LOG 23:56:03:723196156 MP4Box got errors meaning the mp4 video file is corrupted, trying again...
Error opening file /home/seluser/videos/vid_chrome_25550_firefox_25551.mp4: Invalid IsoMedia File
--LOG 23:56:04:730348893 MP4Box got errors meaning the mp4 video file is corrupted, trying again...
Error opening file /home/seluser/videos/vid_chrome_25550_firefox_25551.mp4: Invalid IsoMedia File
--LOG 23:56:05:737278273 MP4Box got errors meaning the mp4 video file is corrupted, trying again...
Error opening file /home/seluser/videos/vid_chrome_25550_firefox_25551.mp4: Invalid IsoMedia File
--LOG 23:56:06:745299741 MP4Box got errors meaning the mp4 video file is corrupted, trying again...
Error opening file /home/seluser/videos/vid_chrome_25550_firefox_25551.mp4: Invalid IsoMedia File
--LOG 23:56:07:752434314 MP4Box got errors meaning the mp4 video file is corrupted, trying again...
--LOG 23:56:08:693483986 Failed! to mp4box_retry.sh within 8s
--LOG 23:56:08:696664741 ffmpeg shutdown complete.
--LOG 23:56:08:924253355 -- DEBUG: video-rec-stderr.log ----
/usr/bin/start-video-rec.sh: line 93: kill: (602) - No such process
ffmpeg version 2.8.15-0ubuntu0.16.04.1 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
  configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
  libavutil      54. 31.100 / 54. 31.100
  libavcodec     56. 60.100 / 56. 60.100
  libavformat    56. 40.101 / 56. 40.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 40.101 /  5. 40.101
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  2.101 /  1.  2.101
  libpostproc    53.  3.100 / 53.  3.100
Guessed Channel Layout for  Input Stream #0.1 : stereo
Input #0, matroska,webm, from '/home/seluser/videos/vid_chrome_25550_firefox_25551.mkv':
  Metadata:
    ENCODER         : Lavf56.40.101
  Duration: 00:00:32.79, start: 0.000000, bitrate: 2122 kb/s
    Stream #0:0: Video: h264 (High 4:4:4 Predictive), yuv444p, 1080x720, SAR 1:1 DAR 3:2, 24 fps, 24 tbr, 1k tbn, 48 tbc (default)
    Metadata:
      ENCODER         : Lavc56.60.100 libx264
      DURATION        : 00:00:32.792000000
    Stream #0:1: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s (default)
    Metadata:
      DURATION        : 00:00:32.644000000
[libx264 @ 0x1637740] using SAR=1/1
[libx264 @ 0x1637740] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
[libx264 @ 0x1637740] profile Constrained Baseline, level 3.1
[libx264 @ 0x1637740] 264 - core 148 r2643 5c65704 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - 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=250 keyint_min=24 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
[aac @ 0x14cc960] The encoder 'aac' is experimental but experimental codecs are not enabled, add '-strict -2' if you want to use it.
grid

I think maybe this is related to the fact that in

docker-selenium/video-rec/bin/fix_videos.sh

Line 55 in db745c1

ffmpeg -i ${tmp_video_path} -vcodec libx264 ${FFMPEG_CODEC_ARGS} ${final_video_path}; \

the options are FFMPEG_CODEC_ARGS in all cases, even if AUDIO is set, in which case, the original capture was actually done with FFMPEG_CODEC_VA_ARGS, or something alike

I'm not sure the raw audio can be converted to mp4 then. Maybe that's something completely different.
(this is a followup to #147 (comment))

[olberger]

A possible workaround can be to set -e FFMPEG_CODEC_ARGS="-vcodec libx264 -preset ultrafast -pix_fmt yuv420p -strict -2 -acodec aac"

[olberger]

Or, as advised by @v0idp in #147 (comment), -e FFMPEG_CODEC_ARGS="-vcodec libx265 -preset ultrafast -pix_fmt yuv420p -strict -2 -acodec aac"