Issue H.264 recording with janus-pp-rec and libavcodec 57

[Marcel]

Hi, 

I run into an issue with h.264 recordings after I convert a video track with janus-pp-rec to a mp4 recoding. I get errors with ffmpeg

janus-pp-rec

$ janus-pp-rec 42534-6633583871323770-2-2-video.mjr video4.mp4

[mp4 @ 0x555b4c439700] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.

42534-6633583871323770-2-2-video.mjr --> video4.mp4

File is 1276743 bytes

Pre-parsing file to generate ordered index...

[WARN] New .mjr header format

This is a video recording:

  -- Codec:   h264

  -- Created: 1507733159169602

  -- Written: 1507733159172787

Counted 1205 RTP packets

Counted 1205 frame packets

  -- 640x480 (fps [2970,9000] ~ 30)

First keyframe: 11970

video4.mp4 is 1253250 bytes

Bye!

There is already a suspicious depreciation warning on AVStream.codec 

This file I can play in VLC but not in Quicktime

If I try to convert it in ffmpeg

$ ffprobe -i video4.mp4

ffprobe version 3.2.4-1~bpo8+1 Copyright (c) 2007-2017 the FFmpeg developers

  built with gcc 4.9.2 (Debian 4.9.2-10)

  configuration: --prefix=/usr --extra-version='1~bpo8+1' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --disable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librubberband --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-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared

  libavutil      55. 34.101 / 55. 34.101

  libavcodec     57. 64.101 / 57. 64.101

  libavformat    57. 56.101 / 57. 56.101

  libavdevice    57.  1.100 / 57.  1.100

  libavfilter     6. 65.100 /  6. 65.100

  libavresample   3.  1.  0 /  3.  1.  0

  libswscale      4.  2.100 /  4.  2.100

  libswresample   2.  3.100 /  2.  3.100

  libpostproc    54.  1.100 / 54.  1.100

[mov,mp4,m4a,3gp,3g2,mj2 @ 0x55a5d6b7d200] Missing key frame while reordering index according to edit list

[mov,mp4,m4a,3gp,3g2,mj2 @ 0x55a5d6b7d200] Could not find codec parameters for stream 0 (Video: h264 (avc1 / 0x31637661), none, 640x480, 483 kb/s): unspecified pixel format

Consider increasing the value for the 'analyzeduration' and 'probesize' options

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video4.mp4':

  Metadata:

    major_brand     : isom

    minor_version   : 512

    compatible_brands: isomiso2avc1mp41

    encoder         : Lavf57.56.101

  Duration: 00:00:20.65, bitrate: 485 kb/s

    Stream #0:0(und): Video: h264 (avc1 / 0x31637661), none, 640x480, 483 kb/s, 15.01 fps, 15 tbr, 90k tbn, 180k tbc (default)

    Metadata:

      handler_name    : VideoHandler

I get the following error: unspecified pixel format 

Also the Stream Video has a "none" where I expect "yuv420p"

I think it's caused by janus-pp-rec using libavcodec 57 and not setting the pixel format correctly any more due to a change.

Kind Regards,

Marcel

[Lorenzo Miniero]

Yeah, I guess there are some changes we don't address in the code. Not experts on this, so if you or others have PRs to fix this they'll be welcome!

L.

[Alessandro Amirante]

I made some tests with libavcodec57 on ubuntu 17.10, and everything works fine. Tested both firefox and chrome, I can convert both mjr files into h264-encoded mp4 files. The pixel format is correctly set to yuv420p.

A.

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[Marcel]

Currently we're running Debian 8 jessie to be sure I updated all the libs. Also tried with Debian 9 stretch. But in both cases the pixel format is not set (none)

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