[FFmpeg-devel] [PATCH 1/2] Add option -movflags write_track_title which will write track title metadata. This is useful in conjunction with the metadata flag to specify track title, especially for workflows that are including multiple audio tracks in the same file.

Carl Eugen Hoyos ceffmpeg at gmail.com
Sat Mar 17 20:59:12 EET 2018

2018-03-17 19:57 GMT+01:00, Courtland Idstrom <cidstrom at telltalegames.com>:
> Hi -
> Thanks for the feedback here. I'll fix that commit message. I believe this
> is the most relevant reference material regarding the userdata ('udta') tag
> for Quicktime:
> https://developer.apple.com/library/content/documentation/QuickTime/Reference/QTRef_AtomsResources/Content/QTRef_AtomsResources4.html#//apple_ref/doc/uid/TP40004285-DontLinkChapterID_1--udta-
> https://developer.apple.com/library/content/documentation/QuickTime/QTFF/QTFFChap2/qtff2.html#//apple_ref/doc/uid/TP40000939-CH204-63839
> From my reading of this, the 'udta' atom can appear as a child of a 'trak'
> atom, and can have an optional child 'name', which is how this title is
> being encoded. I've also verified that this is the method by which
> Quicktime will encode titles if you set them per track using their user
> interface.

Then why is it optional?

Please do not top-post here, Carl Eugen

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