Hi, The mov muxer gets the Quicktime spec a little wrong with closed captions (https://bugzilla.libav.org/show_bug.cgi?id=664) to the extent Quicktime can't read them (and QT7 and MacCaption[1] choke entirely).
I've attached a couple of patches which address some of the issues, and have a couple more WIP in github at https://github.com/aidan/libav/tree/clcp-cleanup which I'm still tidying up. Thanks, - Aidan [1] And guess what one of our partners uses to read these files? ;)
0001-libavformat-movenc.c-add-is_clcp_track-helper.patch
Description: 0001-libavformat-movenc.c-add-is_clcp_track-helper.patch
0002-libavformat-movenc.c-use-is_clcp_track-to-emit-corre.patch
Description: 0002-libavformat-movenc.c-use-is_clcp_track-to-emit-corre.patch
0003-libavformat-movenc.c-write-prof-section-of-tapt-tag.patch
Description: 0003-libavformat-movenc.c-write-prof-section-of-tapt-tag.patch
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