QuickTime Streaming

Finding a Hint Track from a Hinted Track

Tracks can contain track reference atoms of type 'hinr' for each hint track that references them, but QuickTime does not currently insert such atoms when a track is hinted. The only reliable way to determine hint track relationships is to work in the other direction, from the hint track to the track being hinted. Multiple hint tracks could theoretically reference the same track, so you need to find all the hint tracks and check their track reference atoms to be certain.