[FFmpeg-user] Ffmpeg + VAAPI on Polaris GPU not recovering after corrupt video

[Tom W]

Hi All,

After receiving confirmation of the same behaviour from 2 people with 
polaris hardware so I have submitted a bug report.

https://trac.ffmpeg.org/ticket/9608


On 02/12/2021 9:12 pm, Tom W wrote:
> Hi All,
>
> I have been experiencing heavy artifacting in dvb-t live TV streams 
> after corruption in videos with ffmpeg + vaapi + AMD polaris GPU 
> (rx560). The video in question is a live TV stream and I am able to 
> reproduce the issue when the recording is played from a local 
> harddisk. The issue occurs in linux and windows, in kodi, vlc and 
> ffplay and the videos recover OK when played on nvidia and intel gpu's 
> on both windows and linux. The video plays ok if I disable vaapi (most 
> of my testing is done in linux).
>
> I have tried updating mesa to the current release, using a 5.15 kernel 
> and tried various operating systems (manjaro, libreelec nighty, ubuntu 
> 20.04, windows 10).
>
> output of
> ffmpeg -hwaccel vaapi -i Downloads/The\ Project.ts -vcodec rawvideo 
> -acodec copy -f matroska -sn - | ffplay -report -i -
> https://paste.ubuntu.com/p/tP9zrjZ796/
>
> snippets of kodi.log from when the corruption occurs (I can provide 
> more logs)
> 2021-11-30 20:36:36.863 T:333115   DEBUG <general>: 
> ffmpeg[0x56321c011040X]: [mpegts] Packet corrupt (stream = 0, dts = 
> 2007374635).
>
> 2021-11-30 20:52:18.128 T:366796   DEBUG <general>: 
> ffmpeg[0x56321b9c1730X]: [mpegts] Packet corrupt (stream = 0, dts = 
> 2209044203).
> 2021-11-30 20:52:33.301 T:372941   DEBUG <general>: 
> ffmpeg[0x7f559c0dec80X]: [image2] Custom AVIOContext makes no sense 
> and will be ignored with AVFMT_NOFILE format.
>
> vainfo
> http://ix.io/3EE0 <http://ix.io/3EE0>
>
> mediainfo of a longer version of the sample video
> https://paste.ubuntu.com/p/wthYZhVMMf/ 
> <https://paste.ubuntu.com/p/wthYZhVMMf/>
>
> video of artefacting
> https://youtu.be/EJCfi4RP5Pg <https://youtu.be/EJCfi4RP5Pg>
>
> Sample video (200mb) Corruption occurs at around 4m40s.
> https://www.dropbox.com/s/aaiwgvsou10aq2w/corruption-recovery-amd.ts?dl=0
>
> I can provide more info and samples if requested.
> Anyone have any thoughts on the issue?
> Thanks in advance.