559760 - [OOPP]Silverlight movie does not start at certain site

Status: RESOLVED DUPLICATE of bug 564861

(Core :: IPC, defect)

Description

[Alice0775 White]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US;
rv:1.9.3a5pre) Gecko/20100415 Minefield/3.7a5pre ID:20100415051417
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US;
rv:1.9.3a5pre) Gecko/20100415 Minefield/3.7a5pre ID:20100415051417

Silverlight4 movie does not start at certain site.
And this also happens on Namoroka/3.6.5pre ID:20100415050153.

If disabled OOPP, the Silverlight 4 start playing.

Silverlight Plug-In  File: npctrl.dll  Version: 4.0.50401.0

Reproducible: Always

Steps to Reproduce:
1. Start Minefield with new profile (enabled OOPP by default)
2. Open http://video.jp.msn.com/watch/video/%E4%B8%8A%E6%88%B8%E5%BD%A9-%E8%83%8C%E4%B8%AD%E3%81%8B%E3%82%89%E3%82%84%E3%81%95%E3%81%97%E3%81%8F%E3%82%AE%E3%83%A5%E3%83%83/af1mjayu
3. Restart browser and go url if necessary.

Actual Results:
 Silverlight 4 video does not start.

Expected Results:
 Silverlight 4 video shoud start.

Comment 1

[Alice0775 White]

I forgot to mention an important thing.

You should set UA to Firefox/3.6.3.
user_pref("general.useragent.extra.firefox", "Firefox/3.6.3");

Comment 2

[Marcia Knous [:marcia]]

Confirming using the latest trunk nightly on Windows 7, using Silverlight 3 plugin. When I load the video in IE it works fine.

Comment 3

[dako1989]

I have the same problem since updating to 3.6.4. The videos on the German MSN video site won't play anymore. It works, however, without a problem in IE 8 and Firefox 3.6.3. So the new OOPP feature seems to cause this bug. Other Silverlight sites like Bing maps work, though. I'm using Silverlight 4. I hope this will be fixed. Please vote for it :).

Comment 4

[(mostly gone) XtC4UaLL [:xtc4uall]]

(In reply to comment #3)
e.g. http://video.de.msn.com/watch/video/waka-waka-shakiras-wm-song-scheisse/5o2nnpqe

Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.3a5pre) Gecko/20100504 Minefield/3.7a5pre ID:20100504040059 + Silverlight 4.0.50401.0

presumably all video.%locale%.msn.com videos are broken.

Comment 5

[Benjamin Smedberg]

WFM, mozilla-central, SL3, Win7. I'll try with SL4 in a sec.

Comment 6

[Benjamin Smedberg]

Confirmed with SL4, though. An IPC message log doesn't show any obvious errors yet.

Comment 7

[Benjamin Smedberg]

I have this in recording. I walked through it pretty carefully, and silverlight functions normally up through requesting http://img.widgets.video.s-msn.com/resource.aspx?resources=player&configCsId=&configName=&gmts=gmt&mkt=de-de&brand=v5&country=US

and successfully retrieving it. It appears that we deliver that data correctly. Then Silverlight stops doing anything. I don't know why.

Comment 8

[Jim Jeffery not reading bug-mail 1/2/11]

I don't know if its any help, but I see Silverlight4 start to load, then a brief flicker of what appears to be Flash loading circle, as if the video did a 'fall-back' or something, then nothing...

Comment 9

[Benjamin Smedberg]

There is definitely a flash object also on the page, which makes debugging a bit difficult, but it reproduces even if I flip flash to IPP and leave silverlight OOPP.

Comment 10

[dako1989]

Yes, they offer a flash version of the videos, too, but it is only loaded in browsers which don't support Silverlight (like Opera). Otherwise the Silverlight version is loaded or, if it hasn't been installed yet, a popup for the installation appears.

Comment 11

[Mike Beltzner [:beltzner, not reading bugmail]]

We've reached out to Microsoft to see if they can help us understand what's going on here. Definitely a concern for 3.6.4, though, might require a build4 to address.

Comment 12

[Ashish Shetty (Microsoft)]

The Silverlight team is looking at this.

Comment 13

[dako1989]

Good to hear. I hope they will find the cause of this.

Comment 14

[juan becerra [:juanb]]

3.6.3/silverlight 3 or 4 - works.
3.6.4/silverlight 3 or 4 - doesn't work.

Comment 16

[juan becerra [:juanb]]

Video samples: http://www.bing.com/videos/browse/movies?q=browse:movies

Comment 17

[LegNeato]

Marking this as a blocker for now based on comment 14

Comment 18

[LegNeato]

Removing blocker flag based on email exchange. Looks like a bug in the MSN video player.

Comment 19

[Ashish Shetty (Microsoft)]

I have an update from the Silverlight and MSN team's investigation. This turns out to be a bug in the video player on MSN. It boils down to a call to a JavaScript function made by the app over Silverlight's HTML DOM bridge. The caller wasn't tolerant to null. Further it seems running OOPP introduces a timing difference that didn't materialize in older Firefox versions. And this surfaced the behavior of media not playing back. 

The MSN team in fact had already fixed this in their futures branch. They're now looking at accelerating that fix in light of Firefox 3.6.4 release.

Comment 20

[Benjamin Smedberg]

Great, thanks.

Comment 21

[Mike Beltzner [:beltzner, not reading bugmail]]

Re-opening for now; there's some indication it might be more than just comment 19 (or so Ashish said in email)

Comment 22

[LegNeato]

The bug referenced in comment 21 is bug 564861

Comment 23

[LegNeato]

This ended up not being a problem in the MSN video player, it ended up being bug 564861. Though this bug is older, I'm going to dupe this to bug 564861 as it has the patch