Firefox won't play mp4 natively, it seems to skip to the end

Question

I am having issues with Firefox 24 playing my mp4 videos. I enter the url to the video in the address bar (eg http://www.mywebsite.com/video.mp4 ) the video appears to load and skips to the end and shows the "repeat" icon. If I click the icon the video attempts to load and skips to the end again.

In Firebug I can see three requests

1. The first request asks for the whole video and returns a 200 OK .
2. The second request asks for the very end of the video ( Range : bytes=33390592- ) and gets a 206 Partial Content for the requested range ( Content-Range : bytes 33390592-33860228/33860229 )
3. The third request asks for a substantial part of the video ( Range : bytes=65536- ) and again gets a 206 Partial Content reponse for the requested range ( Content-Range : bytes 65536-33860228/33860229 )

In Chrome I see only the first request/response and the video plays correctly.

The Content-Type of the video is video/mp4 in all three requests.

Any ideas?

Answer 1

Looks like my issue was down to my computers video drivers being out of date (they were over 3 years old). Running windows update fixed my issue.