Symptom: video plays ~1s then freezes. BaseMediaStream sync logic:
- video _pts advances 33.3ms/frame (timeBase 1/fps), audio _pts advances
20ms/packet (timeBase 1/48000) — two synthetic frame-index timebases that
never share a clock.
- If audio starts late (ffmpeg audio init / Ogg header), ptsDelta = video-audio
stays positive → isAhead() true → video loops 'await sleep(frametime) while
isAhead()' → video freezes. Downchain: vPipe fills → proc.stdout paused →
demuxer emits ~15fps (log: 30 frames per 2s).
Upstream dank sets syncStream because node-av provides REAL PTS from NUT in a
consistent timebase. Our raw-h264 demuxer has no real PTS; per-stream sleep-PTS
pacing alone keeps both at 1000ms/s, which is correct without a shared clock.
Re-enable sync only if real PTS is added.
asepharyana
5816e94a63