448914 - Performance of VIDEO tag on zoomed page

Status: RESOLVED WORKSFORME

(Core :: Audio/Video, defect)

Description

[Biju]

This may be because I have a slow PC
 
I see a degradation of performance when I play video after Zoomed (or Unzoomed) the containing web page (full zooming).

Steps:-
1. Go to http://commons.wikimedia.org/wiki/Image:Fraser_island_australia_sand_track.ogg
2. Ensure you are not Zoomed/Unzoomed
3. Play video
4. Note how smooth the video is 

5. reload http://commons.wikimedia.org/wiki/Image:Fraser_island_australia_sand_track.ogg
6. Full Zoom the page 
7. Play video

Result:-
Play back on step 7. is not as smooth as step 3.


Expected:-
Both step 7. and step 3. smooth

Comment 1

[(mostly gone) XtC4UaLL [:xtc4uall]]

Is this still an Issue?

For me, using Mozilla/5.0 (Windows NT 5.1; rv:2.0b7pre) Gecko/20100916 Firefox/4.0b7pre there's no Difference in CPU Usage in zoomed State or even changing the Zoom Level during Playback.

Comment 2

[Biju]

The problem as terrible in my old computer. 
And as the old computer dead now I am unable retest exactly.

Hence I tested this with much more bigger videos I get saw on Web.
Almost all I dont see any difference 
So making this as WFM

An exception I saw is with
http://pearce.org.nz/video/shuttle-launch.indexed.ogg

Steps:-
1. Set following about:config items

toolkit.zoomManager.zoomValues = .04,.05,.1,.2,.3,.5,.67,.8,.9,1,1.1,1.2,1.33,1.5,1.7,2,2.4,3,5,7,10,15,20,25
zoom.maxPercent = 2000
zoom.minPercent = 5

2. Go to http://pearce.org.nz/video/shuttle-launch.indexed.ogg

3. Ensure you are not Zoomed/Unzoomed
4. Play video
5. Note CPU usage

6. Zoom the page
7. Play video
8. Note CPU usage

Result:-
user CPU usage is higher than previous case

Comment 3

[cajbir (:cajbir)]

bug 577843 will help with the zooming performance