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thenickdude / webm-writer-js

JavaScript-based WebM video encoder for Google Chrome
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Slow during recording, toDataUrl() too slow? #10

Closed pathammer closed 4 years ago

pathammer commented 4 years ago

I'm seeing my animation loop go from 60fps to 15-8 fps when I begin recording. It runs a little bit faster when I set the quality lower. I'm trying to record a canvas approx 1280x720

My animation loop runs smoothly when I use the MediaReording API so I know my system can encode video fast enough.

When I profile the code, it's spending 70-80ms in toDataUrl()

Is there any trick to get this to run faster?

thenickdude commented 4 years ago

toDataUrl is Chrome's WebP encoder running, so it can't really be sped up.

On Wed, 8 Apr 2020, 11:44 AM Patrick Hammer, notifications@github.com wrote:

I'm seeing my animation loop go from 60fps to 15-8 fps when I begin recording. It runs a little bit faster when I set the quality lower. I'm trying to record a canvas approx 1280x720

My animation loop runs smoothly when I use the MediaReording API so I know my system can encode video fast enough.

When I profile the code, it's spending 70-80ms in toDataUrl()

Is there any trick to get this to run faster?

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