521615 - Support surround sound (e.g. 5.1) media playback

Status: RESOLVED WORKSFORME

(Core :: Audio/Video: Playback, enhancement)

Description

[Keul]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.0; fr; rv:1.9.1.4) Gecko/20091007 Firefox/3.5.4
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.0; fr; rv:1.9.1.4) Gecko/20091007 Firefox/3.5.4

With firefox 3.7a1pre, there's also no sound in some others videos
All videos are working with VLC and google Chrome

Reproducible: Always

Steps to Reproduce:
1. visit http://kyon.haruhi.fr/videos/test.php and play video (with firefox 3.5, 3.7 and Chrome)
Actual Results:  
No sound

Expected Results:  
Sound

Comment 1

[Matthew Gregan [:kinetik]]

Are you saying it used to work in 3.5 and it's broken in recent builds?  Or just that it doesn't work in Firefox at all?  I think it's the latter that's true.

The basic problem is that we open the waveAPI backend using WAVEFORMATEX, which only supports two channel PCM.  We need to move to using WAVEFORMATEXTENSIBLE, which I plan to do in the near future as part of some other changes.

Comment 2

[Keul]

In fact, there's two bugs : the first video never get sound because it's 5.1 ch.

For the two second videos, there's sound, but it's broken in recent builds.

Maybe I should have reported two distinct bugs?

Comment 3

[Chris Pearce [:cpearce (Not reading bugmail)]]

(In reply to comment #2)
> For the two second videos, there's sound, but it's broken in recent builds.

That's probably bug 520493.

Comment 4

[Matthew Gregan [:kinetik]]

Verified that the non-playing audio in the latter two examples is caused by some variant of bug 520493.  I'll make this bug an enhancement bug about adding 5.1 support.

Comment 9

[hong620]

first and second vid is okay with sound(in 5.1), but third one is no-audio in FF27 branch

Comment 10

[Gummi]

All vids work fine here (36.0a1 on Linux).

Comment 11

[Nick]

Gummi, this bug only Windows

Comment 13

[Jean-Yves Avenard [:jya]]

You'll find that all those videos plays just fine with the new WAV decoder.

While they all play in stereo, channel positioning is good in Nightly (49)

Comment 14

[Jean-Yves Avenard [:jya]]

I mark it as WFM. playback of media with surround tracks now works just fine

Cubeb (the audio playback backend) however, only supports stereo, but there's a bug for that.