Canvas Streaming Error in Chrome Canary 93

[sangsoo]

Hello.
There is an error when running the Canvas Streaming in the latest version of Chrome Canary (93.0.4549.3).
- https://docs.flashphoner.com/display/WCS52EN/From+an+HTML5+Canvas+element+(whiteboard)+in+a+browser+via+WebRTC
- A problem occurs when using the H264 codec.
- VP8 codec works normally.

-----Version info-----
wcs_version=5.2.936-1265f2a5d691e1a98306d0c6f3628d752ed9f438
wcs_client_version=2.0.167-c9ff2641d916675b0f8bbd6436ee3b71c08b3fb6

What is the problem?
Thanks.

 

[Max]

Good day.
Seems like Google breaks constraints.customStream which is used in this example: video frames are not sending when publishing H264. We raised the ticket WCS-3221 to investigate it.
Please look at Stream Filter example (source code), this example shows how to use canvas for filtering, and it publishes both H264 and VP8 normally in latest Canary 93.

 

[Max]

We investigated this issue.
Seems like H264 video frames are not sent by browser: on server side, only audio frames are in the stream.
The solution is to disable hardware acceleration in Chrome Canary settings, in this case H264 video is publishing correctly from canvas in Canvas Streaming example.