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Symptoms: low quality of the video, muddy picture, bitrate shown in chrome://webrtc-internals is less than 100 kbps.
Solution: turn off disable hardware acceleration in the browser , switch the browser of by setting the flag chrome://flags/#disable-accelerated-video-encode to Disable, set up the browser or the server to use the VP8 codec for publishing.
5. In some Chrome Canary builds H264 Chromium based browsers (Chrome, MS Edge) video is not publishing from canvas when hardware encoding acceleration is enabled
Symptoms; ther is no video in a stream published from a canvas, but there is audio only, streaming fails with Failed by Video RTP activity error
Solution: disable hardware encoding acceleration in browser by setting or publish VP8the flag chrome://flags/#disable-accelerated-video-encode to Disable, set up the browser or the server to use the VP8 codec for publishing, or use other browser
6. Canvas capturing may stop while switching to another browser tab or minimizing browser window
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b) transcode the stream picture to deisred the desired size at server side