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w3c / webcodecs

WebCodecs is a flexible web API for encoding and decoding audio and video.
https://w3c.github.io/webcodecs/
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Webcodecs performance bottleneck #553

Closed yangfangfang1204 closed 2 years ago

yangfangfang1204 commented 2 years ago

in one tab page, i create sixteen canvases to play video. eight play video by webcodecs decode and eight play video by webassembly soft decoding. then i find the eight video by webcodecs don't flow smoothly, and the VideoDecoder.DecodeQueueSize is bigger. output1 cb decodeQueueSize:79,wid:1920,hei:1088,timestamp:576282,length:0 output1 cb decodeQueueSize:79,wid:1920,hei:1088,timestamp:576282,length:0 output1 cb decodeQueueSize:68,wid:1920,hei:1088,timestamp:576762,length:0 output1 cb decodeQueueSize:81,wid:1920,hei:1088,timestamp:576242,length:0 output1 cb decodeQueueSize:80,wid:1920,hei:1088,timestamp:576322,length:0 output1 cb decodeQueueSize:80,wid:1920,hei:1088,timestamp:576322,length:0 output1 cb decodeQueueSize:80,wid:1920,hei:1088,timestamp:576322,length:0 output1 cb decodeQueueSize:68,wid:1920,hei:1088,timestamp:576802,length:0 output1 cb decodeQueueSize:82,wid:1920,hei:1088,timestamp:576282,length:0 output1 cb decodeQueueSize:80,wid:1920,hei:1088,timestamp:576362,length:0

but if i play sixteen video by webcodecs decode , the sixteen video is all flow smoothly .

so why ?

dalecurtis commented 2 years ago

Please file implementation issues for Chrome at https://crbug.com/new -- this repo is for spec issues. Please provide your chrome://gpu information and a sample showing the problem when you file there.