I've narrowed down an audio issue to only the Firefox browser, and only in Windows 10 and Windows 11, not Mac Catalina. When we view an mp4 video within Firefox, the aud… (read more)
I've narrowed down an audio issue to only the Firefox browser, and only in Windows 10 and Windows 11, not Mac Catalina. When we view an mp4 video within Firefox, the audio includes an extra popping or clicking noise throughout. The same mp4 video plays fine in other browsers or when we download the file and use a video application (like Media Player or VLC). It's only in Firefox+Windows that we can confirm the problem.
Here is an example short video that I created. I apologize for the first few seconds of silence, which is unfortunate since I'm trying to test the sound quality here.
https://pennstateoffice365-my.sharepoint.com/:v:/g/personal/tfw5421_psu_edu/EW34XDcGtppIliWJbioDxaUBkbf_pFqM6NWRPxc_rpO4-g?e=D1M385
The way I recorded the video (which is how our users are doing it) is by recording within Microsoft Powerpoint, then exporting to mp4 file. They take that file and upload it to Canvas, an online classroom system.
https://support.microsoft.com/en-us/office/record-a-presentation-2570dff5-f81c-40bc-b404-e04e95ffab33
Strangely, the link to the video that I provided above will play the audio fine in Firefox in the context of the Sharepoint website. Try downloading that same file to your local computer, though, and playing it from there directly in your Firefox window. On Windows 10/11, you should hear the popping noise in the Firefox browser... but not other browsers. We get the same popping noise in the Canvas course too.
I appreciate any suggestions, either for changes in PowerPoint to improve the audio compatibility cross-browser, or for settings changes in Firefox that would eliminate the popping noise if our students make that change to their browser.