[FFmpeg-user] Crash on DAR/SAR source change while HW transcoding

[Dennis Mungai]

In production, drop this: -hwaccel cuvid -c:v mpeg2_cuvid

There's a reason mpv devs do not recommend cuvid, in particular.
https://github.com/mpv-player/mpv/commit/dbef5b737e2f994f02923c8214cba368b663a655


On 5 June 2018 at 11:55, Mitja Pirih <mitja at alternet.si> wrote:

> Hi,
>
> I am transcoding a live channel from live source. Everything works as
> expected until SAR/DAR changes then ffmpeg crashes out. It happens only
> when I use HW transcoding. Have you seen this behavior before? Any ideas
> how to solve this issue?
>
> /usr/bin/ffmpeg -hwaccel cuvid -c:v mpeg2_cuvid -i
> udp://239.213.0.6:1234 -c:a libfdk_aac -profile:a aac_he -ac 2 -b:a 64k
> -ar 48000 -c:v h264_nvenc -preset llhq -profile:v high -maxrate 2500k
> -bufsize 5000k -f flv rtmp://127.0.0.1/live/test
>
> ffmpeg version N-90591-g4b736bc Copyright (c) 2000-2018 the FFmpeg
> developers
>   built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.9) 20160609
>   configuration: --prefix=/home/mp/ffmpeg_build
> --pkg-config-flags=--static
> --extra-cflags=-I/home/mp/ffmpeg_build/include
> --extra-ldflags=-L/home/mp/ffmpeg_build/lib --extra-libs=-lpthread
> --bindir=/home/mp/bin --enable-cuda --enable-cuvid --enable-libnpp
> --extra-cflags=-I/usr/local/cuda/include
> --extra-ldflags=-L/usr/local/cuda/lib64 --enable-gpl --enable-libass
> --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame
> --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx
> --enable-libx264 --enable-libx265 --enable-libspeex --enable-nonfree
> --enable-nvenc
>   libavutil      56. 12.100 / 56. 12.100
>   libavcodec     58. 17.100 / 58. 17.100
>   libavformat    58. 10.100 / 58. 10.100
>   libavdevice    58.  2.100 / 58.  2.100
>   libavfilter     7. 14.100 /  7. 14.100
>   libswscale      5.  0.102 /  5.  0.102
>   libswresample   3.  0.101 /  3.  0.101
>   libpostproc    55.  0.100 / 55.  0.100
> Hyper fast Audio and Video encoder
> usage: ffmpeg [options] [[infile options] -i infile]... {[outfile
> options] outfile}...
>
> Use -h to get full help or, even better, run 'man ffmpeg'
>
>
> ===== Log =====
> Starting ffmpeg...
> [mpeg2video @ 0x2a65000] Invalid frame dimensions 0x0.
>     Last message repeated 15 times
> Impossible to convert between the formats supported by the filter
> 'Parsed_null_0' and the filter 'auto_scaler_0'
> Error reinitializing filters!
> Failed to inject frame into filter network: Function not implemented
> Error while processing the decoded data for stream #0:0
> [libfdk_aac @ 0x2b24340] 3 frames left in the queue on closing
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