enc-amf: Fix m3u8 recording

[shinji3]

Description

SPS/PPS header insert

Motivation and Context

When recording in m3u8 format using H264 / AVC encoder (AMD Advanced Media Framework), the second and subsequent TS files are broken. Fixed second and subsequent TS files are broken.

How Has This Been Tested?

Tested with start recording in OBS Studio

Types of changes

Bug fix (non-breaking change which fixes an issue)

Checklist:

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

[shinji3]

I uploaded a bug test video https://github.com/shinji3/BugTestVideo

[RytoEX]

Closing this PR as this encoder has been deprecated in favor of a new implementation in the upcoming OBS Studio 28 release.