TypeError: this.error(...) is null in VJS 4.7.3

[Globulopolis]

In Firefox 28.0 console:
Timestamp: 02.09.2014 23:12:35
Error: TypeError: this.error(...) is null
Source File: video.dev.js
Line: 6290

In IE 11:
VIDEOJS: ERROR: (CODE:4 MEDIA_ERR_SRC_NOT_SUPPORTED) No compatible source was found for this video. [object Object]
"VIDEOJS:"
"ERROR:"
"(CODE:4 MEDIA_ERR_SRC_NOT_SUPPORTED)"
"No compatible source was found for this video."
{
[functions]: ,
proto: { },
code: 4,
MEDIA_ERR_ABORTED: 1,
MEDIA_ERR_CUSTOM: 0,
MEDIA_ERR_DECODE: 3,
MEDIA_ERR_ENCRYPTED: 5,
MEDIA_ERR_NETWORK: 2,
MEDIA_ERR_SRC_NOT_SUPPORTED: 4,
message: "No compatible source was found for this video.",
status: null
}

Example http://jsfiddle.net/abekx6jq/
Minified version I used in this example.

[Globulopolis]

Ok. I localized the bug. If the poster cannot be loaded when VJS throw an error but video can be played in Firefox, but not in IE. In IE I'm get an error and can't play video.

PS! I think this bug not only in FF an IE #1465

[mmcc]

Thank you for the heads up. This seems close enough to #1465 that we can combine them. Want to add a note on the other issue for tracking purposes?

[redbar0n]

This might detail the problem and the solution:
http://magnemg.tumblr.com/post/113251336220/how-to-solve-a-capybara-webkit-and-video-js

If it is the same problem, then it's an issue with the Webkit implementation that Qt 4 uses on OSX. The solution is to upgrade to Qt 5 which uses a newer version that doesn't throw TypeError's when trying to play MP4 videos. See the blog post for more details.