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Play flv smoothly

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Stef Prein
Play flv smoothly
on May 1, 2010 at 11:04:03 am

Hi,

I'm creating a splash screen for a website. The content consists of a flv file, because the original content is video. So far, so good.
The problem is that I can't get the flv to play smoothly. I had someone create a preloader for it, but it's still jerky...
I used Sorenson Spark as the encoder, size 1024x768 and bitrate of 1000 kpbs cbr. I also tried On2 VP6, but that codec had worse results...

I don't know what goes wrong, but increasing the bitrate seems to help. Still, it doesn't play smoothly. You can find the video here. Or an alternative version here.

Stef Prein
student Image and Media Technology
Utrecht School of the Arts
The Netherlands

http://www.stefprein.com


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Mike Smith
Re: Play flv smoothly
on May 2, 2010 at 10:32:51 am

You have some trade-offs to make.

You don't normally want or need preloaders for flvs. You can set the buffer time instead. http://www.adobe.com/livedocs/flash/9.0/main/wwhelp/wwhimpl/common/html/wwh...

You know splash screens are controversial, and need to be handled with care. http://www.useit.com/alertbox/990530_comments.html

Very large video files (e.g. your 1024x768 screen size) in complex codecs (mp4, but also VP6 to a lesser extent) demand a lot of performance for smooth playback. On2 has developed a simpler version of VP6 for high definition files, which is easier to decode at speed (but of course loses a little image quality on the way). Also your bit rate will demand a fast broadband connection not in use for much else.

Does your video have to take up so much of the screen ...?




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Stef Prein
Re: Play flv smoothly
on May 2, 2010 at 11:17:24 am

Hi Mike,

Thanks for your reply! I know about splash screens, but I couldn't convince my client of the controversy ;-)

Yes, maybe I need to downscale the video. I was already thinking of that.

The thing is, that the video is loaded externally into the swf-file. I heard that doing so will increase the performance, but it doesn't seem to help...

I'm gonna look into it! Thanks a lot!

Stef Prein
student Image and Media Technology
Utrecht School of the Arts
The Netherlands

http://www.stefprein.com


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