Why are MP4 video playback problems solved when the MP4 is converted to M4V?
Something weird is happening with my website's MP4 videos in Firefox (39.0.3), using the videojs html5 player. For example, in a 4-minute video: sometimes there is no audio; sometimes the audio starts but cuts out after 30 seconds; sometimes the last 30 seconds of audio starts playing after the first 30 seconds. This behaviour is only seen (or heard) in files accessed off the server - accessed off the C-drive, they play fine.
The MP4-with-audio-problems was created from a .MOV file using Handbrake 0.10. I noticed that other MP4s I did last year (with Handbrake 0.09) do not have audio problems in Firefox. So it may be a Handbrake issue?
Anyway, workaround! I converted the same .MOV to .M4V (using Handbrake) and the audio problems have disappeared. It's odd, because M4V is supposedly the exact same file as the MP4 - only the extension is different. But it works.
Усі відповіді (1)
This might have to do with it:
- https://developer.mozilla.org/en-US/d.../Supported_media_formats see MP4 H.264 (AAC or MP3) section