504821 - High CPU load when watching ogg theora <video> tag video

Status: RESOLVED DUPLICATE of bug 514848

(Toolkit :: Video/Audio Controls, defect)

Description

[C. Dyck]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9.1.1) Gecko/20090715 Firefox/3.5.1 GTB5 (.NET CLR 3.5.30729) AutoPager/0.5.2.2 (http://www.teesoft.info/)
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9.1.1) Gecko/20090715 Firefox/3.5.1 GTB5 (.NET CLR 3.5.30729) AutoPager/0.5.2.2 (http://www.teesoft.info/)

The video on the what's new page, uses up to 100% CPU on my Athlon XP 2600+. 
But when I download the Video and watch it with VLC 1.0 it needs just 10-15%.

Reproducible: Always

Steps to Reproduce:
1. Go to URL
2. Play the video
3.
Actual Results:  
Video and audio hangs

Expected Results:  
Normal Playback

Comment 1

[Matthew Gregan [:kinetik]]

Is the video playing (slowly), or are you saying that the browser hangs?  If it hangs, does it ever recover?

Comment 2

[C. Dyck]

No the browser itself is still responsive. And the CPU load goes down when I open another tab so that the video isn't shown.

I add 2 screenshots, perhaps they help to find the reason.

Comment 3

[C. Dyck]

Attachment: Screenshots from Process Explorer while playing

Comment 4

[Michael]

This kind of sounds like bug 462667. Maybe the reason is the same...firefox can't take advantage of graphics cards like vlc can. Also, firefox has to work with the DOM. VLC does not.

Comment 5

[C. Dyck]

I have a Athlon XP 2600+ CPU, 2GB RAM and a Saphire Radeon 9600 Pro
Don't know whether vlc can use my graphics card.

Comment 7

[Viktor Gal]

(In reply to comment #5)
> I have a Athlon XP 2600+ CPU, 2GB RAM and a Saphire Radeon 9600 Pro
> Don't know whether vlc can use my graphics card.

are you using 64bit windows by any chance?

Comment 8

[C. Dyck]

Athlon XP has no 64bit extensions. I'm using good old 32bit Windows XP SP3.