[Webkit-unassigned] [Bug 202233] New: MediaRecorder.start() Method is Ignoring the "timeslice" Parameter

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Wed Sep 25 13:33:56 PDT 2019


https://bugs.webkit.org/show_bug.cgi?id=202233

            Bug ID: 202233
           Summary: MediaRecorder.start() Method is Ignoring the
                    "timeslice" Parameter
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: All
                OS: All
            Status: NEW
          Severity: Major
          Priority: P2
         Component: Media
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: zach at squadcast.fm

Created attachment 379577

  --> https://bugs.webkit.org/attachment.cgi?id=379577&action=review

test fails in safari 13.0

Thank You for implementing the GetUserMedia & MediaRecorder interfaces!

We developed a test to verify GetUserMedia & MediaRecorder @ https://codepen.io/XachMoreno/pen/bGbeNWX.

The "timeslice" parameter within the MediaRecorder.start() method is being ignored & recording continues beyond the number in milliseconds.

To replicate...

 1. Open Safari
 2. Open the Develop Menu
 3. Hover over the Experimental Features list item
 4. Click on MediaRecorder to Enable it
 5. Navigate to https://codepen.io/XachMoreno/pen/bGbeNWX
 6. Click on the blue Start Test button at the bottom
 7. Allow access to Microphone & Camera
 8. Click on the Record button at the bottom
 9. Wait 5 seconds

If the test FAILS, an alert dialog will open communicating the lack of support for the timeslice parameter.

If the test PASSES, the 5 second timer will reset to 1 & continue recording without an alert.

Spec Reference - https://w3c.github.io/mediacapture-record/#dom-mediarecorder-start

Docs Reference - https://developer.mozilla.org/en-US/docs/Web/API/MediaRecorder/start

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