obs-outputs: Fix HEVC/RTMP composition time #8650
Merged
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Fixes bug in Enhanced RTMP implementation, where HEVC streams with B-frames enabled are not adhering to the spec.
Credit to derrod
Description
Populates non-zero composition times in the FLV extended video tag header for HEVC streams.
Motivation and Context
See #8522 for context.
The Enhanced RTMP spec provides an optimization where HEVC streams without B-frames do not need to send a composition time of 3 bytes (with value 0) for every frame.
This patch fixes a bug: Composition times are just not getting set at all, instead of only when the value of the composition time is 0.
How Has This Been Tested?
We ran streams against YouTube, inspected the bitstream and confirmed that composition times are correctly set.
Types of changes
Bug fix (non-breaking change which fixes an issue)
Checklist: