FireFox Video throws warning but video actually works? - firefox
OS: Ubuntu 18.04
FF: 85.0.1
Error/warning: Cannot play media. No decoders for requested formats: video/mp4, video/mp4
Same error for video/ogg
Here are my questions: 1) The video still plays fine once loaded, and there is no error in Chrome or Chromium. Why does the video work fine after loading but throws the error on load? 2) Is there anything that can be done without re-encoding over 2 gigs of video?
Context: this is an old no-profit site that used Flash for video and we really don't want to throw a lot of time at, but there are gigs of videos. I converted all .flv files and .mpg files to .mp4 using the most simple of ffmpeg commands, examples:
ffmpeg -i video-source.flv video-source.mp4
ffmpeg -i video-source.mpg video-source.mp4
ffmpeg -i video-source.mpg video-source.ogg
As I watched the ffmpeg output, it looked to me like the codec was H264 (at least, I think that is what I am seeing, not a video expert.)
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> theora (libtheora))
Stream #0:1 -> #0:1 (aac (native) -> vorbis (libvorbis))
Server response in a direct request to the mp4 files is
Content-Type
video/mp4
I have seen the documentation and posts on fragmented mp4 and if re-encoding is the only option, we're probably going to abandon as it does play once loaded.
Code is simplistic, using an html5 doctype:
<video id=some-container-id" width="320" height="240" controls>
<source src="/images/video/mp4/video-source.mp4" type="video/mp4">
<source src="/images/video/ogg/video-source.ogg" type="video/ogg">
Your browser does not support the video tag.
</video>
Is the only option here to pander to FireFox and re-encode everything since as mentioned, it plays fine once loaded and throws no error in Chrome?
Just ignore the warning. It's wrong and fixed in Firefox 86.
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