Tuesday, January 25, 2005

WMODE and Flash Video

Now here is one everyone should know: If you use Flash Video, either by using the Flash Communication Server or progressive FLV download, do not use windowless mode. What is windowless mode you ask? This TechNote has more information of what it means. We use this term internally since it best describes what it does. Instead of creating our own drawing surface we use the browser window so that you can overlay Flash content over HTML content.

Windowless mode is a nice feature, but it heavily impacts on performance. More so with video. To the point where your whole browser will eventually freeze because of timing issues during playback. If that happens you either need to kill your browser process or in the worst case reboot your machine.

This is something a lot of customers have trouble with when deploying video and we get quite a few calls on it.

14 Comments:

Blogger gandalf said...

Relying on a certain OS and browser to achieve an effect is something I hope fades into the distance.

-e.dolecki

Tuesday, January 25, 2005 6:57:00 PM  
Blogger richardleggett said...

Perhaps this is fixed in FlashPlayer 8?:
http://www.laflash.org/picture_library/Maelstrom/pix-Pages/Image46.html

Hope so :)

Wednesday, January 26, 2005 1:23:00 AM  
Blogger SnoboJohan said...

About the FLV format... Tried FFmpeg on youre advice to convert FLV to AVI but the FLV file that is created by the Flash Com Server use the NellyMoser codec for sound and thats not supported (by anyone but Sorensen)... se this discussion: http://www.macromedia.com/cfusion/webforums/forum/messageview.cfm?catid=266&threadid=868432&enterthread=y

Thursday, February 03, 2005 7:13:00 AM  
Blogger andrew a said...

Does this only apply to streaming or progessive download. If you embed the flv file in your flash movie and mask out the background will this still cause the browser to crash?

I am working on a project where I am doing this and am trying to decide wheteher to use an flv file embeded in the flash movie or a series of png images.

Thanks

Tuesday, August 16, 2005 11:03:00 AM  
Anonymous Tom said...

Thanks for the great blog entry. We also had these issues.

Does anybody know if things are better nowadays in Flash 8 and/or 9? It's very sad that i.e. displaying layers above video players is almost not possible due to this.

Saturday, December 09, 2006 6:12:00 AM  
Anonymous Anonymous said...

Things are NOT better today with IE 6. I just lost my weekend because it would not occur to me that it could still be a problem

Sunday, March 04, 2007 9:34:00 PM  
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Blogger Jason Morris / Neo-Pangea.com said...

Quick question/request: Is there a way to create a static copy of the web page behind the SWF, so basically a wmode=staticTransparency? It seems that if you could create a BitmapData copy of the web page behind an embedded SWF, that would be good enough to allow for much of the flexibility that transparency provides without hindering performance past the initial redraw. Is this possible, or could it be? thanks much for the info, keep it up.

Friday, June 27, 2008 8:58:00 AM  

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