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

[Paul B Mahol]

On 9/9/15, Peter B. <pb at das-werkstatt.com> wrote:
> 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?

Remove assert and rebuild&reinstall is encoding working?

>
>
> 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
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