[ffmpeg] add amd/amf, qsv hard encoding and openh264 encoding support

[fawdlstty]

No description provided.

[MicroYY]

Anything update? Still no qsv support

[NancyLi1013]

@mcmtroffaes

Would you like to help add these features for ffmpg?

Thanks in advance.

[mcmtroffaes]

Currently a bit too swamped with other things to take a lead on this.

I lack the hardware to test amf or qsv. For openh264, https://github.com/cisco/openh264 needs to be added as a port first. Judging from the readme, this will be non-trivial for vcpkg, requiring msvc to be called from an msys2 shell (similar to what we currently do to compile ffmpeg itself). Happy to help with reviewing and testing where I can.

[NancyLi1013]

Thanks for your help and clarifications about this.

We might delay to implement these features.

[shahneil]

For AMF, it looks like https://github.com/GPUOpen-LibrariesAndSDKs/AMF needs to be added as a port first, as the AMF framework headers are needed to configure ffmpeg with --enable-amf (see https://www.ffmpeg.org/general.html#toc-AMD-AMF_002fVCE).

Since AMF/VCE is Windows-only (see the ffmpeg link above), I believe a new Windows-only ffmpeg feature amf would need to be added that includes the --enable-amf option during ffmpeg compilation.

If anyone can provide further guidance that would be great, as I'm quite new to vcpkg. I'll try to create a port for the AMF headers in the meantime.

[xiaozhuai]

Any progress? Still no qsv support.