584638 - .ogv video is choppy and flickering in full screen mode

Status: RESOLVED WORKSFORME

(Core :: Audio/Video, defect)

Description

[aravindm]

Attachment: Video is choppy and flickering in full screen mode

Mozilla/5.0 (Windows; Windows NT 5.1; rv:2.0b3) Gecko/20100804 Firefox/4.0b3

Steps to reproduce :
1. Open http://videos.mozilla.org/firefox/3.6/getpersonas.ogv
2. Context on the video and Select Full screen mode

Actual Result : Hover with you mouse in the video. The video plays choppy and flickering in full screen mode.

Expected Result : Firefox should play as normal in full screen mode.

Comment 1

[juan becerra [:juanb]]

I am having trouble reproducing this problem on a VM, so far.

Comment 2

[Alvaro]

Attachment: Screenshot of fullscreen <video> in FF4b3 when showing the control bar

Added for better explaining the issue. I think the bug refers to this problem (shown in the screenshot), which appeared in beta 2 and is still in beta 3. The image is fine until I move the mouse so the control panel at the bottom appears, and the image gets garbled like this. The bluish areas are part of the playing video.

Comment 3

[Marcia Knous [:marcia]]

Isn't this a dupe of Bug 558454?

Full screen mode OGG personas video seems to be choppy to me on Windows.

Comment 4

[Alvaro]

Hmm, that particular video seems to be intentionally low frame rate and kind of "choppy" for artistic reasons. I hope the bug report was not a result of that.

Video playback is fine as far as I can tell with the following exception:

The problem with *mouse hovering in full screen* remains in FF4 beta 5! (see the attached screenshot). I observed that in two different PCs with Nvidia Geforce GPUs (8600 and 9600). Maybe it deserves its own bug report with a clearer title. In fact I would raise severity for this issue.

Comment 6

[u279076]

(In reply to comment #5)
> *** Bug 602194 has been marked as a duplicate of this bug. ***

This happens not just in full-screen mode, but normal mode too.

Speaking to the "artistic" stutter in comment 4, yes the video has an intentionally lower frame rate.  However, if you use a previous build of Firefox you can clearly see the flicker is unintentional.  It seems the video skips back half a second every once in a while.  It's probably a performance issue.

Comment 7

[cajbir (:cajbir)]

Can you describe what you mean by 'flickering' in a little more detail? Or is there another video that isn't artistically choppy that makes it easier to identify? On a nightly build this video plays the same as in FF 3.6 for me fullscreen or otherwise.

Comment 8

[u279076]

When I experienced this it was like the video stopped for a half second then resumed.  I witnessed this every 20-30 seconds or so.

Comment 9

[cajbir (:cajbir)]

Is it still happening on latest trunk? If so, can you paste the 'Graphics' section from 'about:support' so I can see what video scaling code is being used? General specs of your mention would be useful too (CPU, # of cores, etc).

Comment 10

[u279076]

I'll get back to you in a day.  I'm flying to Toronto tomorrow.
(posting this from my phone)

Comment 11

[cajbir (:cajbir)]

Great, thanks!

Comment 12

[Alvaro]

In Minefield (downloaded on 2010-10-15) the problem had at last disappeared to me.

Until then I only saw it in Windows XP machines with NVIDIA Geforce cards.

Comment 13

[u279076]

I can no longer reproduce this on today's nightly: 20101102

Marking as RESOLVED WORKSFORME.  Please reopen with the details requested in comment 9 if you can still reproduce this bug.