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movenc: add fallback audio track tref support

Multimedia / Libav - John Stebbins [jetheaddev.com] - 18 November 2015 04:38 UTC

This feature allows making associations between audio tracks that apple players recognize. E.g. when an ac3 track has a tref that points to an aac track, devices that don't support ac3 will automatically fall back to the aac track.

Apple used to *guess* these associations, but new products (AppleTV 4) no longer guess and this association can only be made explicitly now using the "fall" tref.

ca48956 movenc: add fallback audio track tref support
libavformat/movenc.c | 19 +++++++++++++++----
1 file changed, 15 insertions(+), 4 deletions(-)

Upstream: git.libav.org