Flash Player 10 crashes Internet Explorer with H.264 video

At work we ran into this bug the other day, looking into it I found out that Adobe hasn’t put any effort into documenting this one so I thought I’d give it a shot myself in order to try and raise awareness.

In short, the bug occurs with Flash content playing H.264 video in Internet Explorer with certain version of the Flash Player older than Under these circumstances, if the video its playhead is set back to the start (seeking) then Flash Player will crash Internet Explorer — not slowdown-crash, but actually end the process; the browser-window will be closed down (and with that, your Flash application).

We had this bug occur in both Internet Explorer 7 and 8, and upgrading the Flash Player to a newer version ( or later) made the problem go away. I’m not completely sure whether this problem has been present since HD video functionality was introduced in the Flash Player, or that perhaps it only started later on. The computers we experienced this bug on though, had either Flash Player or installed.

I don’t exactly know in which part of the native Actionscript libraries this issue starts, I presume it’s in the VideoPlayer class (as I take it that that’s where the actual video logic is implemented), but it might as well be in the FLVPlayback component.

Of course any additional information is very welcome, leave it in the comments. Also, there’s this one thread in the YouTube Community Help Forums that was somewhat helpful, check it out if you’re interested.

3 thoughts on “Flash Player 10 crashes Internet Explorer with H.264 video

  1. We had a similar issue last year (dec 2008) on IE7 with H264.

    Everytime we tried to stop the video, IE crashed.
    so we used this trick to stop the video :


    so, may be this kind of hack could work with your bug.
    good luck

  2. [quote comment=”92586″]flvPlayback.getVideoPlayer(0).close();[/quote]

    Thanks! I’ll be sure to try it out when I get back to the office.

    [quote comment=”92590″]Here is a fix regardless of what version of IE you are currently running… getfirefox.com

    I highly recommend it.[/quote]

    Thanks Steve, it’s not me you need to be telling that though, been using FF for years — go tell the end-users 😉

Comments are closed.