1229904 - vid.me videos fail to fallback to Flash playback on Windows XP

Status: RESOLVED INCOMPLETE

(Core :: Audio/Video: Playback, defect, P3)

Description

[Trammel May]

Attachment: Vid.me videos never play.bmp

Actual Result:
When the user attempts to watch a video on vid.me, the are presented with the loading circle infinitely. 

Expected Result:
The videos should load correctly so that the user can watch the desired video. 

Steps to Recreate:
1. Launch firefox and navigate to vid.me
2. Click on any video link. 
3. Click on the video box to attempt to start playing video. 
4. Observe the video presents a loading circle and never loads. 

Notes:
Works in google chrome. 
Does not work with Flash installed.

Comment 1

[Trammel May]

Attachment: Bytor DxDiag.txt

Comment 2

[Trammel May]

Attachment: Bytor Graphics 1.txt

Comment 3

[Trammel May]

Attachment: Bytor Graphics 2.txt

Comment 4

[Trammel May]

Attachment: Vid.me videos never play.jpg

Comment 5

[u279076]

I get slightly different behaviour in a Windows XP VM.

Firefox 41 and earlier without Flash: black rectangle where the video should be.
Firefox 41 and earlier with Flash: video plays without issue.
Firefox 42 and later without Flash: black rectangle where the video should be.
Firefox 42 and later with Flash: black rectangle where the video should be.
Chrome 47 plays the videos without any problems.

In neither case do I see the stalled loading screen as reported above.

Comment 6

[u279076]

I tried to regress this unsuccessfully using mozregression. In release the issue doesn't start appearing until Firefox 42 but on Nightly it goes back as far as I can regress. This may be a tech evangelism issue but I'm not sure how to get evidence.

Comment 7

[Ralph Giles (:rillian)]

If 41 falls back and 42 doesn't, it might be a user agent sniffing failure. Anthony, can you please try faking the user agent in 42 or 43 and see if that fixes it?

Comment 8

[u279076]

Firefox 41 - video plays with Flash
Firefox 42 - video does not play
Firefox 42 with Firefox 41 User Agent - video does not play

Comment 9

[Ralph Giles (:rillian)]

Ok, thanks for checking Anthony.

Comment 10

[Ralph Giles (:rillian)]

Something wihth canplaytype maybe. We'll need to investigate what the site is seeing that's different between 41 and 42. Will likely be fixed by mp4 support for xp in Firefox ~45 regardless.

Comment 11

[Chris Peterson [:cpeterson]]

Firefox will be able to play H.264 without Flash using the Adobe CDM in Firefox 45 (bug 1210231).

Comment 12

[Masatoshi Kimura [:emk]]

Bug 1210231 does not help for Win XP. Moreover, we postponed Adobe GMP on Windows XP because of a problem about the Facebook news stream.

Comment 13

[Masatoshi Kimura [:emk]]

We've removed MSE whitelist since Firefox 42 (bug 1185611). Does it have to do with this issue?

Comment 14

[Anthony Jones (:ajones, :kentuckyfriedtakahe, :k17e)]

Mass change P2 -> P3

Comment 15

[u597032]

Flash is no longer supported