Native AMD AMF encoder - test build

⚠️ Unofficial test build — native AMD AMF encoder

This is a test build, not an official Vibepollo release. It exists so people with AMD cards can help validate the native AMD AMF encoder (PR #295, tracking issue #172) before it's merged.

What's new

A native AMD AMF encoder that talks to the AMF SDK directly instead of going through FFmpeg's *_amf wrappers:

• ~44–46% lower per-frame encode latency measured on a 7900 XT (1.7 ms vs 3.0 ms at 1080p60; 2.65 ms vs 4.9 ms at 1440p60)
• Reference-frame invalidation — recovers from packet loss without a full keyframe
• HDR + D3D11 zero-copy input

How to test

1. Back up your existing Vibepollo/Sunshine config first if you have one.
2. Install/run this build. It's wired native-first: the native encoder (amdvce) is tried automatically and falls back to the FFmpeg path (amdvce_legacy) if it can't initialise — so it should just work.
3. To force a path: encoder = amdvce (native) or encoder = amdvce_legacy (old FFmpeg path, for comparison).
4. New tuning knobs in the AMD encoder tab: amd_ltr_frames (RFI depth) and amd_input_queue_size.

Please report

• Your GPU + driver version
• Whether the native path was selected — check the log for Found H.264/HEVC/AV1 encoder: *_amf [amdvce]
• Anything that breaks or regresses

…on PR #295 or issue #172. Especially keen on RDNA2 / older cards and APUs, which I couldn't test myself.

Encoder work is ported/adapted from foundation-sunshine.