Vodanalyzer for multifragment(moof/mdat) segment duration

[Murmur]

If input vod segments has pre-generated multifragment(multiple moof/mdat pairs) then mediasegmentfilter does not calculate the correct segment duration. It always return the last fragment duration. See this fix to keep duration increasing across all fragments.

dashlivesim/dashlib/mediasegmentfilter.py:

  def process_trun(self, data):
    ...
    sample_flags_present = flags & 0x400
    sample_comp_time_present = flags & 0x800
    duration = 0 if self.duration==None else self.duration  ##make multifrag work
    for _ in range(sample_count):
    ...

See also Issue #68 multifragment sequencenumbering.

[TobbeEdgeware]

Multi-fragment segments are not yet supported in the main branch of livesim. It would require rewrite of the trun box in every fragment. However, given the interest in this topic, I think it should be added. Unfortunately, I don't have much time to work on this, but hopefully, I can squeeze it in.