compiling gstreamer to javascript

[Vito De Tullio]

did anyone tried to compile (for example with emscripten) gstreamer to pure
js code?
is it possible to try it in the browser?

(I am interested to make an html5-video-tag extension with gst + a custom
video codec)

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[Sebastian Dröge-3]

On Sa, 2016-06-11 at 10:25 +0200, Vito De Tullio wrote:
> did anyone tried to compile (for example with emscripten) gstreamer to pure 
> js code?
> is it possible to try it in the browser?
>
> (I am interested to make an html5-video-tag extension with gst + a custom 
> video codec)

GStreamer itself should be possible to some degree, the problem is that
you will also have to compile all dependencies of GStreamer and the
plugins you want to use, and you need to find replacements for a)
assembly code and b) platform specific APIs (dlopen() for example).

It will be possible but you'll have to put quite some effort into this
and modify the code accordingly.

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[Nicolas Dufresne-5]

Le 11 juin 2016 3:32 AM, "Vito De Tullio" <[hidden email]> a écrit :
>
> did anyone tried to compile (for example with emscripten) gstreamer to pure
> js code?
> is it possible to try it in the browser?
>
> (I am interested to make an html5-video-tag extension with gst + a custom
> video codec)
>

I don't think this will work. You may try. In the past, I've seen demo exposing GStreamer to WebKit using seedkit. The project is probably unmaintained by now.

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> By ZeD
>
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[Sebastian Dröge-3]

On Sa, 2016-06-11 at 07:00 -0400, Nicolas Dufresne wrote:

>
> Le 11 juin 2016 3:32 AM, "Vito De Tullio" <[hidden email]> a
> écrit :
> >
> > did anyone tried to compile (for example with emscripten) gstreamer
> to pure
> > js code?
> > is it possible to try it in the browser?
> >
> > (I am interested to make an html5-video-tag extension with gst + a
> custom
> > video codec)
> >
> I don't think this will work. You may try. In the past, I've seen
> demo exposing GStreamer to WebKit using seedkit. The project is
> probably unmaintained by now.

That's still using native C libraries though, while compiling (a
modified version of) GStreamer with emscripten would give you a plain
JavaScript version that would run in any JavaScript engine (and thus
browser).

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[Nicolas Dufresne-4]

Le samedi 11 juin 2016 à 11:35 +0300, Sebastian Dröge a écrit :

> On Sa, 2016-06-11 at 10:25 +0200, Vito De Tullio wrote:
> >
> > did anyone tried to compile (for example with emscripten) gstreamer
> > to pure 
> > js code?
> > is it possible to try it in the browser?
> >
> > (I am interested to make an html5-video-tag extension with gst + a
> > custom 
> > video codec)
> GStreamer itself should be possible to some degree, the problem is
> that
> you will also have to compile all dependencies of GStreamer and the
> plugins you want to use, and you need to find replacements for a)
> assembly code and b) platform specific APIs (dlopen() for example).
>
> It will be possible but you'll have to put quite some effort into
> this
> and modify the code accordingly.

Specially for things using assembly, like libffi which is no a hard
dependency of GLib.

>
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> [hidden email]
> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
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[Sebastian Dröge-3]

On Sa, 2016-06-11 at 11:00 -0400, Nicolas Dufresne wrote:

> Le samedi 11 juin 2016 à 11:35 +0300, Sebastian Dröge a écrit :
> > On Sa, 2016-06-11 at 10:25 +0200, Vito De Tullio wrote:
> > >
> > > did anyone tried to compile (for example with emscripten)
> > > gstreamer
> > > to pure 
> > > js code?
> > > is it possible to try it in the browser?
> > >
> > > (I am interested to make an html5-video-tag extension with gst +
> > > a
> > > custom 
> > > video codec)
> > GStreamer itself should be possible to some degree, the problem is
> > that
> > you will also have to compile all dependencies of GStreamer and the
> > plugins you want to use, and you need to find replacements for a)
> > assembly code and b) platform specific APIs (dlopen() for example).
> >
> > It will be possible but you'll have to put quite some effort into
> > this
> > and modify the code accordingly.
>
> Specially for things using assembly, like libffi which is no a hard
> dependency of GLib.

You would have to implement these using JavaScript mechanisms I guess.
As another "platform" next to x86, arm, etc ;)

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