Thanks Paul. I’ll do more testing tomorrow and will get back to you with further data.
> On Aug 27, 2020, at 5:14 PM, Paul B Mahol <one...@gmail.com> wrote: > > On 8/28/20, Gary Yost <g...@yostopia.com <mailto:g...@yostopia.com>> wrote: >> ’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… 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, but I haven’t been using this workflow since March. >> My questions are: >> >> 1. Is the Prores implementation in ffmpeg a 100% accurate implementation as >> per the Apple spec? > > There is no Apple specification for ProRes. At least not official one > as open standard. > >> >> 2. Has anything changed in the Prores code transcoding of ffmpeg in the lat >> 4 months? > > If ffplay playback is also very slow, than yes. > >> >> Thanks! >> >> -g >> _______________________________________________ >> ffmpeg-user mailing list >> ffmpeg-user@ffmpeg.org <mailto:ffmpeg-user@ffmpeg.org> >> https://ffmpeg.org/mailman/listinfo/ffmpeg-user >> <https://ffmpeg.org/mailman/listinfo/ffmpeg-user> >> >> To unsubscribe, visit link above, or email >> ffmpeg-user-requ...@ffmpeg.org <mailto:ffmpeg-user-requ...@ffmpeg.org> with >> subject "unsubscribe". > _______________________________________________ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org <mailto:ffmpeg-user@ffmpeg.org> > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > <https://ffmpeg.org/mailman/listinfo/ffmpeg-user> > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org <mailto:ffmpeg-user-requ...@ffmpeg.org> with > subject "unsubscribe". _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
