Thank you for the response Carl! It unblocked me and I learned something new.
On Tue, 1 May 2018 at 13:50 Carl Eugen Hoyos <[email protected]> wrote: > 2018-05-01 22:35 GMT+02:00, Julian Cooper <[email protected]>: > > > I'm using the ffmpeg CLI to pre-process AVC and HEVC MP4s. Part of that > > pre-processing involves moving the 'moov' atom to the head of the MP4. > The > > 'moov' atom contains a 'udta' with metadata I would like to preserve. The > > 'moov/udta' atom is being dropped when calling: > > > > ffmpeg -i source.mp4 -c copy -movflags +faststart faststart.mp4 > > You misunderstand: > This command does not take an mp4 file and move its atoms > around. It reads an mp4 file and writes a new mp4 file with > many different attributes. > The tool you need is qt-faststart which is also part of the > FFmpeg project. > > Carl Eugen > _______________________________________________ > ffmpeg-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe". _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
