217280 2020-10-03 13:24:23 -0700 MediaRecorder Constructor is Ignoring the MediaRecorderOptions Parameter 2020-10-23 22:09:48 -0700 1 1 1 Unclassified WebKit Media Safari 14 Unspecified Unspecified RESOLVED DUPLICATE 216856 InRadar P2 Normal --- 1 zach webkit-unassigned ashley eric.carlson webkit-bug-importer youennf oldest_to_newest 1694441 0 zach 2020-10-03 13:24:23 -0700 Thank You for implementing the MediaRecorder.start(timeslice) parameter! We developed a test to verify the MediaRecorderOptions parameter & mimeType property @ https://codepen.io/XachMoreno/full/bGpXdXX. The MediaRecorderOptions.mimeType property within the MediaRecorder constructor is being ignored & the MIME type is fixed as video/mp4. Furthermore, the MediaRecorder.isTypeSupported method is not implemented. To replicate... 1. Open Safari 14 or Safari Technology Preview 14.0.1 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/full/bGpXdXX 6. Click on the red Request Media Permissions button at the bottom 7. Allow access to Microphone & Camera 8. Click on the Test Media Recorder Options button at the bottom 9. Wait 1 seconds 10. An alert dialog will open communicating test results for 1. the MediaRecorder.mimeType property 2. the MediaRecorder.isTypeSupported method 3. MediaRecorderOptions.mimeType vs. MediaRecorder.mimeType 4. MediaRecorderOptions.mimeType vs. Blob.type Spec Reference - https://w3c.github.io/mediacapture-record/#dictdef-mediarecorderoptions Docs Reference - https://developer.mozilla.org/en-US/docs/Web/API/MediaRecorder/MediaRecorder 1694580 1 webkit-bug-importer 2020-10-04 14:32:18 -0700 <rdar://problem/69934963> 1701147 2 zach 2020-10-23 14:30:59 -0700 In Safari Technology Preview Release 115 14.1 the test in our original issue is no longer running & the Media Recorder constructor fails with the following error. "NotSupportedError: mimeType is not supported" Are we planning to support the mimeType property? 1701207 3 eric.carlson 2020-10-23 22:09:48 -0700 (In reply to Zachariah Moreno from comment #2) > In Safari Technology Preview Release 115 14.1 the test in our original issue > is no longer running & the Media Recorder constructor fails with the > following error. > > "NotSupportedError: mimeType is not supported" > > Are we planning to support the mimeType property? MediaRecorderOptions.mimeType and MediaRecorder.isTypeSupported were added with https://bugs.webkit.org/show_bug.cgi?id=216856 *** This bug has been marked as a duplicate of bug 216856 ***