[Webkit-unassigned] [Bug 85851] MediaStream API: support MediaStreamRecorder implementation

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=85851

--- Comment #87 from Octavian Naicu <naicuoctavian at gmail.com> ---
Hi,

I've spent the last few days playing with the implementation in Safari 14.0.2 and Safari TP 119. 

As a result I have 2 comments regarding the information presented in https://webkit.org/blog/11353/mediarecorder-api/

1) It mentions Safari Technology Preview 105 as the one that enabled support for the MediaRecorder API by default but in fact Safari TP 114 is the one which lists "Enabled MediaRecorder by default on macOS" in it's release notes:
https://developer.apple.com/safari/technology-preview/release-notes/

2) The code in that post shows the use of 1 second time slices:

    // Let's receive 1 second blobs
    mediaRecorder.start(1000); 

In Safari 14.0.2 this functionality is broken. Using the above code will produce an .mp4 file that's corrupt as it won't play in the browser or locally in VLC.

mediaRecorder.start() does work in Safari 14.0.2 on desktop.

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