Thanks Carl, OK wil try that.
On Thu, 27 Feb 2020 at 15:24, Carl Eugen Hoyos <ceffm...@gmail.com> wrote: > > Am Do., 27. Feb. 2020 um 16:08 Uhr schrieb Kevin Smallman > <pipelin...@gmail.com>: > > > I can encode them successfully on my linux laptop with libx264 cpu > > encoding and -pix_fmt yuv420p option. The cpu is ivybridge, so the > > gpu can do h264 encode and decode which plays fine in vlc on linux, > > but not in quicktime on the old imac. > > The reason is possibly that you have to avoid cabac etc., try > with -profile baseline (which does not force the baseline profile that > no decoder supports but the required constrained baseline profile). > > > My question is: is there a set of options so that the hardware > > accelerated ffmpeg encoding/decoding/both can output a mp4 file with > > yuv420p pixel format that is compatible with the quicktime standards? > > > > So far, I haven't been able to find one from here: > > https://trac.ffmpeg.org/wiki/Hardware/VAAPI > > > > To get hardware encoding to work I seem to need to use this option > > with the h264_vaapi encoder: > > -vf 'hwupload,format=nv12' > > Unrelated to your quicktime issue: > The result of this encode will be a file with yuv420p (there is no > semantic difference between nv12 and yuv420p). > > Carl Eugen > _______________________________________________ > 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". _______________________________________________ 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".
