MP4AddHintTrack - Add a hint track
hFile Specifies the mp4 file to which the operation applies.
Specifies the reference media track for this hint track.
Upon success, the track id of the new track. Upon an error,
MP4AddHintTrack adds a hint track to the mp4 file. A hint track is used
to describe how to send the reference media track over a particular
network transport. In the case of the IETF RTP protocol, the hint track
describes how the media data should be placed into packets and any
media specific protocol headers that should be added.
Typically there is a one to one correspondence between reference media
track samples and hint track samples. The start time, duration, and
sync flags are typically the same, however provisions are made for
deviations from this rule.
The MP4 library provides extensive support for RTP hint tracks. This
includes a easy to use API to create RTP hint tracks, and read out
fully constructed RTP packets based on the hint track.