[FFmpeg-trac] #8734(avcodec:reopened): videotoolbox decoding h264 60fps too slow for realtime

FFmpeg trac at avcodec.org
Sun Jun 14 21:26:18 EEST 2020

#8734: videotoolbox decoding h264 60fps too slow for realtime
             Reporter:  der_richter   |                    Owner:
                 Type:  defect        |                   Status:  reopened
             Priority:  normal        |                Component:  avcodec
              Version:  git-master    |               Resolution:
             Keywords:  videotoolbox  |               Blocked By:
             Blocking:                |  Reproduced by developer:  0
Analyzed by developer:  0             |

Comment (by JEEB):

 Replying to [comment:3 cehoyos]:
 > Did you transcode the input file with vlc? If not, the comparison makes
 little sense (vlc does suppport transcoding).

 Could you please note why you think transcoding/non-transcoding is
 relevant in this case? The issue is just being replicated through ffmpeg.c
 as that is the simplest way to utilize FFmpeg's internal tooling as a way
 of reproduction for an issue ticket. It is also visible in another
 application utilizing VT through the the FFmpeg hwaccel interface.

 This can be a difference in the VT API usage between VLC's and FFmpeg's
 hwdec interfaces, yes. If that is what you are pointing towards, I would
 note that mentioning it in this way is with quite the detour (at least in
 my opinion).

Ticket URL: <https://trac.ffmpeg.org/ticket/8734#comment:4>
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