Support iOS Safari

[ipragmatechadmin]

@t-mullen Thanks for your hard work for this library but this library is not working on iOS Safari. We have a scenario where we need to use crop the video from the webcam and it didn't work for us. On further investigation, we found the issue with the patch applied for fixing Audio. After that, we found that the capture stream from canvas isn't working well on iOS Safari though it works fine on other browsers. Please take a look and fix this issue with this library. If you want then we can share the code which worked for us with the limitation that we are using directly canvas to show the video and not passing the stream to the video element.

[t-mullen]

This library is uses experimental APIs and I'm not surprised it doesn't work on iOS. I'm not even sure an iPhone could performantly do video composition, but I might be wrong.

Feel free to share any code you think would be helpful. You can email me anything you don't want to share publicly (but please keep support discussions to Github).

[archeelp]

@ipragmatechadmin can you please share the patch you made to make it work?
It would be a great help. Thank you.

[hthetiot]

See #64 (comment)

[hthetiot]

Fixing createConstantSource and moving canvas creation to start did the trick.

[hthetiot]

Fixed in 4.0.0 release.