mirror of
https://github.com/calesthio/OpenMontage.git
synced 2026-08-19 14:55:58 +08:00
fa756fbec5
The CI Linux FFmpeg build carried the keyed frame forward without an alpha plane, so overlay drew opaque green over the background (corner stayed green) instead of compositing — the E2E test failed there even though it passed on macOS/Windows. Force `format=yuva420p` immediately after chromakey so the keyed transparency always has an explicit alpha plane, and size the background to the frame up front (color=...:size=WxH, passing the probed width/height into _process_chromakey) instead of scaling a 1x1 source with scale2ref — dropping scale2ref also removes the format negotiation that discarded the alpha on some builds. Output is flattened to yuv420p after the overlay.