QSV hardware encoding

[brad-richardson]

Description

Initial support for Intel Quick Sync Video. This will use the libmfx/mediasdk route for now as FFmpeg 5.1 does not have oneVPL.

This is mostly copied from the work done on #77 plus a few of the mentioned fixes as best as I could interpret them.

Currently has unmerged changes from #509 and is using a local copy of the pre-build libraries (test/)

TODO:

• [ ] Get it working 🙃
• [ ] Update docs
• [ ] Web changes
• [ ] Linux?

Issues Fixed or Closed

• Resolves #436

Type of Change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [X] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [X] Dependency update (updates to dependencies)
• [X] Documentation update (changes to documentation)
• [X] Repository update (changes to repository files, e.g. .github/...)

Checklist

• [ ] My code follows the style guidelines of this project
• [ ] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have added or updated the in code docstring/documentation-blocks for new or existing methods/components

Branch Updates

LizardByte requires that branches be up-to-date before merging. This means that after any PR is merged, this branch must be updated before it can be merged. You must also Allow edits from maintainers.

• [X] I want maintainers to keep my branch updated