mxf.js — MXF Demuxer Demo

Forces the seek/index strategy instead of using what the file declares. cbg = every frame a fixed byte size; vbe = per-frame entry table; none = no map, jump by byte percentage then dig to the next packet. Use it to exercise fallback paths (e.g. force none on an indexed file). Default: auto.

How a seek resolves the displayed picture. accurate decodes from the preceding keyframe up to the exact target frame. keyframe shows only the GOP-head I-frame for the whole GOP — near-instant, but lands on a random-access point, not the exact frame. (Scrubbing always uses keyframe previews regardless.) Default: accurate.

Forward-buffer low-water mark — the player fetches more whenever buffered-ahead drops below this. Higher rides out bandwidth dips; lower starts playing sooner. Typical 2–10 s. Library default 10 s (this demo pre-fills 3 for faster first paint).

Upper bound on how far ahead to prefetch — caps memory and the bytes wasted when you seek away. Typical 8–30 s. Library default 30 s (demo pre-fills 8).

After a cold start, seek, or stall, playback holds on the first decoded picture until this much is buffered ahead, then plays once. Lower = snappier resume but more re-buffering on a thin/decode-bound source. Typical 0.5–2 s. Default 1.5 s.

RAM budget for caching raw (compressed) source bytes already fetched, so backward seeks, loops and scrub-revisits don't re-download. 0 disables it. A whole moderate file often fits, making re-seeks network-free. Typical 0–512 MB. Library default 256 MB (demo pre-fills 0 as a diagnostic).

How uncompressed PCM audio is played. auto picks by browser support; webaudio forces Web Audio scheduling alongside the muted video; mse tries PCM through MSE (rarely supported). Default: auto.

Emit detailed worker + player logs to the browser console. The on-page debug timeline below works regardless. Library default: off (demo pre-fills on).