[Webkit-unassigned] [Bug 258567] New: MediaRecorder ondataavailable outputs Blobs with size:0 type:""

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=258567

            Bug ID: 258567
           Summary: MediaRecorder ondataavailable outputs Blobs with
                    size:0 type:""
           Product: WebKit
           Version: Safari 16
          Hardware: Mac (Apple Silicon)
                OS: macOS 13
            Status: NEW
          Severity: Blocker
          Priority: P2
         Component: Media
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: omerokcuoglu at gmail.com

Created attachment 466831

  --> https://bugs.webkit.org/attachment.cgi?id=466831&action=review

Example js file to test bug.

Hi,

MediaRecorder ondataavailable outputs Blobs with size:0 type:""

This issue is introduced with Safari 16. I can not pin point the version. MediaRecorder works flawlessly with Safari 15 on Intel and in any other browser.

Problem is consistent with both of these streams:
1- audioContext.createMediaStreamDestination
2- navigator.mediaDevices.getUserMedia({ audio: true }) 


I am attaching a js file for you to test. It only requires you to insert a button in your html. It will output ondataavailable Blobs every second upon click.

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