This car is Chrome 148. Full WebCodecs, MediaSource, H.264/HEVC/AV1/VP9, 75 fps of full-frame 1080p canvas, and audio autoplays unmuted with no gesture. The old-Chromium premise behind MPEG1/JSMpeg does not apply here.
The link is the constraint, not the browser — about 3–4 Mbps measured in the car. Preset G stream-copies Twitch 1080p60 flawlessly on the server at 5.9 Mbps, which is roughly twice what the car can pull. Copy a lower rendition instead.
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/1Capability probe
APIs, codecs, autoplay policy, WebSocket throughput, sustained canvas fps.
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/2Twitch · MPEG1 → JSMpeg → Canvas
The compatibility floor. Proven on older MCUs; this car does not need it.
test this
/3Twitch · H.264 → WebCodecs → Canvas
Preset G stream-copies with no re-encode. Pick 720p60 or 480p30 to fit the link.
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/4Controlled VOD
Local 1080p file, native and WebCodecs engines, scripted seek-recovery test.
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/5Kinopub resolver & catalog
Auth, all seasons, episode resolution with a real ffprobe. No playback.
test this
/6Kinopub end-to-end
Progressive MP4, no transcode, through the same-origin proxy. Seeking will be slow — that is the CDN.
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/statsBenchmark history
Every session from both sides, comparable across firmware versions.
checking server…