[FFmpeg-user] ? About ffmpeg's prores implemention

Carl Eugen Hoyos ceffmpeg at gmail.com
Sun Aug 30 22:35:31 EEST 2020

Am Fr., 28. Aug. 2020 um 02:01 Uhr schrieb Gary Yost <gary at yostopia.com>:
> ’ve got a question about the Prores implementation in ffmpeg because I’ve seen
> some odd behavior here with FCPX (running on a very beefy 16-core Mac Pro
> with 192Gram and an Afterburner card).
> When I output files from ffmpeg in ProresLT format and bring them into FCPX, they stutter badly…

Command line and complete, uncut console output missing, but see below...

> playback is ~5fps.  But when I transcode/optimize them in FCPX, which creates Prores422
> versions of those files, they play back in FCPX seamlessly.
> The ffmpeg files _used_ to play back seamlessly on this machine when I was doing this Jan-March

Which commit broke the behaviour?

This is the most important question, continuing the discussion without
the answer makes very little sense.

Carl Eugen

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