Nice to see excitement around the proposed html-in-canvas feature, but remember you can already put canvas behind/atop HTML elements.

The benefits of this new feature are:

➡️ Readbacks (eg sending to a VideoEncoder)
➡️ Showing HTML on non-planar shapes
➡️ Using shaders on HTML

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🦖 Random MDN: VideoEncoder: dequeue event 🦖

https://developer.mozilla.org/en-US/docs/Web/API/VideoEncoder/dequeue_event

The dequeue event of the VideoEncoder interface fires to signal a decrease in VideoEncoder.encodeQueueSize.

#webdev

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My favorite test prompt for AI coding tools:

Make a simple HTML page which uses the VideoEncoder API to create a video that the user can download.

So far, not a single AI has managed to create a working solution.

Ancient way of #coding helps boost popular #videoencoder by 100x — but is it too good to be true?

zedreviews.com/2025/07/23/a...

On Safari — you're right, H.264 via VideoEncoder is spotty. We isWebCodecsSupported()-gate the fast path and fall back to MediaRecorder with isTypeSupported() probing:

video/mp4;codecs=avc1 → video/webm;codecs=vp9 → video/webm

Whatever the browser natively encodes is what ships.

Ha yeah, WebCodecs→file is 3 gotchas stacked.

Primary path: webm-muxer, VP9/Opus in WebM. VP9 VideoEncoder is bulletproof across Chromium, container spec is dead simple.

MP4 path: Vanilagy's mp4-muxer (~12KB), lazy-imported via dynamic import() to keep initial bundle lean.

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#Encoder
#NDI

It did not even use the VideoEncoder API.

The problem withe the MediaRecorder API is that it saves the current timestamp with the frames. So the video plays at the speed it is created. Not useful for video processing. That's why I referenced the VideoEncoder API in the prompt.

This is sadly not very much up to me! Alpha doesn't appear to be supported by VideoEncoder just yet, at least the last time I tried. WebM has an Alpha metadata flag I can enable, but including it when alpha video can't be encoded is a bit useless. Do you have any updates here?

It doesn't use ffmpeg-wasm, it uses the VideoEncoder API.

WebCodecs on Windows now has a batch-encoding path for VideoEncoder, improving performance with... 144.0a1 / Web Platform / Bug 1978232 WebCodecs on Windows now has a batch-encoding path for VideoE...

Origin | Interest | Match

Ich hab nen defekten Super Nintendo auf eBay gekauft. Er geht an, aber zeigt nur ein rot/grünes Bild (Spiel hab ich noch keines). Hab gerade nach Kurzschlüssen geschaut und ja der C11, der zum Videoencoder geht hat einen. Drückt mir die Daumen, dass es nur der ist.