212275 2020-05-22 13:22:29 -0700 MediaRecorder requestData() always returns empty Blob 2020-06-15 02:02:37 -0700 1 1 1 Unclassified WebKit Media Safari Technology Preview Mac macOS 10.15 RESOLVED DUPLICATE 206929 InRadar P2 Normal --- 1 majo webkit-unassigned cdumez eric.carlson jer.noble majo webkit-bug-importer youennf zach oldest_to_newest 1655413 0 majo 2020-05-22 13:22:29 -0700 I'm working on this bug https://bugs.webkit.org/show_bug.cgi?id=202233 and I wanted to use requestData() but found that in Safari or the MiniBrowser, requestData() always return an empty Blob. I have try it in Chrome and Firefox and it worked as expected. 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/majov5/pen/LYpaEga 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 Now every 5 seconds the Codepen console will print [object Blob] { size: 0, slice: function slice() {...}, type: "" } 1655890 1 webkit-bug-importer 2020-05-25 10:25:17 -0700 <rdar://problem/63601261> 1662584 2 youennf 2020-06-15 02:02:37 -0700 *** This bug has been marked as a duplicate of bug 206929 ***