Documentation
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Overview ¶
combine-segs provides an example of multiplexing tracks from fragmented MP4 files. It combines init and media segments from two different files into a single multitrack init or media segment. The functions
combineInitSegments combineMediaSegments
combines the tracks from two or more different init or media segments. The combined tracks get unique track names as specified using parameters. Note that they should start at 1 according to the file format specification.
In principle, the `trex` box data from the init segment may be needed when generating media segments since that may contain default values. In practice, for this specific case of just transfering tracks, it should work without propagating the `trex` data.
The data is written to the combined `mdat` box track by track, so that there is exactly one `trun` box for each track. Interleaving data into more `trun` boxes should be possible by writing fractions of samples from the different input files.
Source Files