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Sequencer Source MF_TOPOLOGY_PROJECTSTART not being honoured

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I have two audio files:

093500.wma
MF_TOPOLOGY_PROJECTSTART: 102310000

095100.wma
MF_TOPOLOGY_PROJECTSTART: 9701530000

Filenames are HHMMSS in UTC.

If I seek in my UI timeline to 10:34:50 and start playback, there is a ten second pause before the first segment starts, as expected.  However, the second segment starts immediately after the end of the first, when the second segment should actually start 00:16:10s after the start of playback.

Session GLOBAL_TIME is set.

Topology_Flags_Last is set on the second segment, and not the first.

Any ideas what's incorrect?





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