On 16/02/18 15:03, Piotr Oniszczuk wrote: > > >> >> VDPAU is fully supported via the hwaccel API and is usable in the ffmpeg >> program via the -hwaccel option. The (deprecated for years) standalone >> VDPAU decoder which you are trying to use here was removed from master with >> the major version bump leading to ffmpeg 4. It is plausible that it was >> broken before that point (because it never really fit as a decoder and I >> doubt it ever got much testing once the hwaccel was introduced), but you >> will likely have a hard time getting anyone to care about such a >> long-deprecated feature which doesn’t exist any more on master. >> > > Mark, > > Probably we have a bit misunderstanding here… > > My issue with h_t_t_p://warped.inet2.org/sample3.mkv is fact mythtv playback > issue causes by ffmpeg3.4.1 regression (as recently mythtv upgrade build-in > ffmpeg from 3.2.1 to 3.4.1) > IIRC mythtv uses hwaccel API for HW decoded vdpau playback. > > In discussion here I’m using ffplay to decouple ffmpeg from mythtv and > demonstrate that root cause of failed playback is 3.4.1 regression - not > something else (i.e. mythtv).
Well, I suggest trying to replicate it in a setup which uses the same components as the case you are interested in rather than completely different ones. If it uses the AVHWAccel API then "ffmpeg -hwaccel vdpau" should be able to reproduce the same behaviour. > If You have better idea to address this regression - I’m open to any > suggestion. > > Currently we have proof that most recent ffmpeg release (3.4.2) has > regression (as 3.2.1 plays perfectly). > > Is this enough to look on problem? Your sample works for me? Master: $ ./ffmpeg_g -y -v 0 -i sample3.mkv -an -frames:v 100 out_sw.yuv $ ./ffmpeg_g -y -v 0 -hwaccel vaapi -hwaccel_output_format yuv420p -i sample3.mkv -an -frames:v 100 out_vaapi.yuv $ DISPLAY=:0 ./ffmpeg_g -y -v 0 -hwaccel vdpau -hwaccel_output_format yuv420p -i sample3.mkv -an -frames:v 100 out_vdpau.yuv $ cmp out_sw.yuv out_vaapi.yuv $ cmp out_sw.yuv out_vdpau.yuv $ ./ffmpeg_g ffmpeg version N-90065-g8a8d0b319a Copyright (c) 2000-2018 the FFmpeg developers ... 3.4 branch: $ ./ffmpeg_g -y -v 0 -i sample3.mkv -an -frames:v 100 out_sw.yuv $ ./ffmpeg_g -y -v 0 -hwaccel vaapi -hwaccel_output_format yuv420p -i sample3.mkv -an -frames:v 100 out_vaapi.yuv $ DISPLAY=:0 ./ffmpeg_g -y -v 0 -hwaccel vdpau -hwaccel_output_format yuv420p -i sample3.mkv -an -frames:v 100 out_vdpau.yuv $ cmp out_sw.yuv out_vaapi.yuv $ cmp out_sw.yuv out_vdpau.yuv $ ./ffmpeg_g ffmpeg version n3.4.2 Copyright (c) 2000-2018 the FFmpeg developers ... (Both VAAPI and VDPAU running on an AMD Polaris 11 / RX 460.) - Mark _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
