19.01.2018, 22:10
(19.01.2018, 21:57)Selur Wrote: Okay.
That was the main thing I could think of that usually differs between ffmpeg and mp4box.
Enabling "Config->Output->Container Settings->Mp4 Settings->iTunes Compatibility" usually is also a wise choice when using Quicktime for playback.
Never really cared for Quicktime playback much, since they only support a small fraction of MPEG-4 ASP, MPEG-4 AVC and probably MPEG-4 HEVC.
Got no further idea without even knowing into what format you stuff into your mp4 files.
Cu Selur
Ps.: haven't updated MP4Box for quite some time so my guess is that this is probably related to the encoder you use.
Prores mov files are encoded into x264 mp4 files (x264 Hybrid Default crf 1-pass). Selecting iTunes Compatibility does not fix the problem.