obs-outputs: Adjust HEVCDecoderConfigurationRecord for hvc1 tag

[derrod]

Description

Sets ps_array_completeness when creating the HEVC Decoder Configuration Record to 1.

Motivation and Context

The hvc1 tag is used in Enhanced FLV/RTMP and the native MP4 muxer (#10608) because Apple for some reason does not support the more permissive hev1 tag, and one of the requirements laid out in the specification (ISO/IEC 14496-15) is that for hvc1 the array_completeness value for parameter sets needs to be 1.

FFmpeg also just sets this to 1 if the tag is hvc1 without any additional checks for bitstream modification and I checked playback of these files on Windows and macOS with various players and browsers so it's probably fine.

As far as I can tell this really just means that all SPS/VPS/PPS need to be inside the HEVCDecoderConfigurationRecord present in the moov atom, which is what we do anyways.

How Has This Been Tested?

Tested as part of #10608.

Types of changes

• Tweak (non-breaking change to improve existing functionality)

Checklist:

• My code has been run through clang-format.
• I have read the contributing document.
• My code is not on the master branch.
• The code has been tested.
• All commit messages are properly formatted and commits squashed where appropriate.
• I have included updates to all appropriate documentation.

[RytoEX]

At a glance, this seems fine. Would appreciate someone else giving it a sanity check.