[FFmpeg-user] h264 (yuv420p) to ffv1: "Assertion s->bits_per_raw_sample >= 8 failed"

[Peter B.]

I've just received a request, regarding an error message when converting
from h264/PCM/MOV to FFV1/PCM/AVI.
The transcoding doesn't start and exits with the following error message:

[quote]
"Assertion s->bits_per_raw_sample >= 8 failed at
/home/kyle/software/ffmpeg/source/ffmpeg-git/libavcodec/ffv1enc.c:802"
[/quote]

The source is "yuv420p(tv, bt709)", which sounds like "8
bits_per_raw_sample" to me.

Couldn't figure out why this happens.
It's either a very obvious mistake on my side, or something going wrong.

Any ideas?


Thank you very much in advance,
Pb



Commandline and complete, uncut console output:

-------------------------------
$ ffmpeg -i MiB_Beispiel_01.mov -vcodec ffv1 -level 3 -acodec copy
MiB_Beispiel_01.avi
-------------------------------


ffmpeg version N-73648-g90dd6ad Copyright (c) 2000-2015 the FFmpeg
developers
  built with gcc 4.9.2 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
--enable-gnutls --enable-iconv --enable-libass --enable-libbluray
--enable-libbs2b --enable-libcaca --enable-libdcadec
--enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc
--enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb
--enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus
--enable-librtmp --enable-libschroedinger --enable-libsoxr
--enable-libspeex --enable-libtheora --enable-libtwolame
--enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc
--enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp
--enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid
--enable-lzma --enable-decklink --enable-zlib
  libavutil      54. 28.100 / 54. 28.100
  libavcodec     56. 48.100 / 56. 48.100
  libavformat    56. 40.100 / 56. 40.100
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 21.100 /  5. 21.100
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  2.100 /  1.  2.100
  libpostproc    53.  3.100 / 53.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'MiB_Beispiel_01.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 512
    compatible_brands: qt
    encoder         : Lavf56.40.100
  Duration: 00:01:00.00, start: 0.000000, bitrate: 70728 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661),
yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 69188 kb/s, 25 fps, 25
tbr, 90k tbn, 50 tbc (default)
    Metadata:
      handler_name    : DataHandler
      timecode        : 11:18:10:00
    Stream #0:1(eng): Audio: pcm_s16be (twos / 0x736F7774), 48000 Hz,
stereo, s16, 1536 kb/s (default)
    Metadata:
      handler_name    : DataHandler
    Stream #0:2(eng): Data: none (tmcd / 0x64636D74)
    Metadata:
      handler_name    : DataHandler
      timecode        : 11:18:10:00
Assertion s->bits_per_raw_sample >= 8 failed at
/home/kyle/software/ffmpeg/source/ffmpeg-git/libavcodec/ffv1enc.c:802