On Tue, Apr 7, 2015 at 9:51 AM,  <[email protected]> wrote:

> I couldn't find a bug on it but it seems MSE is disabled even on Nightly on 
> Linux.  Is this intentional?   (I swear it was defaulted on for a couple 
> nightly releases)

Yes. We've been concentrating on MSE support for mp4, and broke some
of the MSE support for WebM in the process...which was the only
support working on Linux. We've turned it off in the meantime. Plan is
to re-enable it after the refactoring work tracked in
https://bugzilla.mozilla.org/show_bug.cgi?id=1148292 is complete.

If you want to try the current support, you can manually set
media.mediasource.webm.enabled to true in about:config.

> Is there a general bug tracking MSE for Linux?

Not for Linux specifically. The overall MSE tracking bug is
https://bugzilla.mozilla.org/show_bug.cgi?id=mse

> And is implementation planned for the gstreamer back-end too?

It's on the todo list, but I don't think anyone's currently working on
it. This can happen in parallel with the refactoring if anyone wants
to contribute support. Basically we need the current GStreamerReader
functionality ported to the PlatformDecoder interface in
dom/media/fmp4/ so the shared demuxer can pass individual video and
audio samples to decoders.

A similar interface to call vdpau directly for video decoding would
also be interesting.

 -r
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