ffmpeg.wasm probe / extract / mux smoke test (4c-3)
What this validates:
- probe: ffprobe-JSON parse populates VideoMetadata + TrackInfo[] + AudioTrackInfo[].
- extractTrack: per-subtitle “Extract” buttons appear after probe — click to download the raw subtitle bytes.
- mux: “Test mux” button bundles a synthetic 2-line .ass into the source as a new track + downloads the resulting .mkv.
cross-origin isolated: checking…
Drop a video file anywhere on this page
probe pipeline:
- ·1. FFmpegClient.create()
- ·2. client.probe(file)
ffmpeg stderr (0 lines):
(no logs yet — drop a file)