Has anyone got any examples of using GStreamer from D. I found that GtkD packages a GStreamer API which is great, but there are very few example codes – at least that I have found.

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Russel. ============================================================================= Dr Russel Winder      t: +44 20 7585 2200   voip: sip:russel.winder@ekiga.net 41 Buckmaster Road    m: +44 7770 465 077   xmpp: russel@winder.org.uk London SW11 1EN, UK   w: www.russel.org.uk  skype: russel_winder

https://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/chapter-helloworld.html#section-helloworld - Hello world.
https://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/index.html - GStreamer Application Development Manual
http://docs.gstreamer.com/display/GstSDK/Basic+tutorials - Basic tutorials.

On Fri, 2016-02-26 at 14:40 +0000, Kagamin via Digitalmars-d-learn wrote:
> https://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html /chapter-helloworld.html#section-helloworld - Hello world. https://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html /index.html - GStreamer Application Development Manual http://docs.gstreamer.com/display/GstSDK/Basic+tutorials - Basic tutorials.

This is the C documentation, the issue I have is about the D wrapper and some idiomatic usage examples of it.

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Russel. ============================================================================= Dr Russel Winder      t: +44 20 7585 2200   voip: sip:russel.winder@ekiga.net 41 Buckmaster Road    m: +44 7770 465 077   xmpp: russel@winder.org.uk London SW11 1EN, UK   w: www.russel.org.uk  skype: russel_winder

wow! I hadn't tried this gtkd library before. I was hunting for the gstreamer in particular.

The hello_world alsa-sink audio example failed on Windows.  The debugger indicates no sink, which I guess is reasonable.

With very little effort, though, I converted the hello_world example to generate a video test pattern and use vidoeconvert and autovideosink, and that popped up right away on Windows in a 64 bit build ... so, nice going!

The gstreamer example built without error in msvc 2013 with visualD and DMD32 D Compiler v2.073.2

On Thu, 2017-06-15 at 19:27 +0000, Jay Norwood via Digitalmars-d-learn wrote:
> wow! I hadn't tried this gtkd library before. I was hunting for the gstreamer in particular.

Welcome to the group of people using GStreamer from D. I suspect I may be the only other member of that club.

> The hello_world alsa-sink audio example failed on Windows.  The debugger indicates no sink, which I guess is reasonable.

Ah the word Windows. I use only Debian Sid and Fedora Rawhide, with occasional descent into some ancient version of MacOS (Apple refuse to upgrade older laptops, some agist excuse ;-) so I can't help with anything platform specific relating to Windows.

Both Debian Sid and Fedora Rawhide have packages for GStreamer and LDC so installation is very easy.

> With very little effort, though, I converted the hello_world example to generate a video test pattern and use vidoeconvert and autovideosink, and that popped up right away on Windows in a 64 bit build ... so, nice going!
> 
> The gstreamer example built without error in msvc 2013 with visualD and DMD32 D Compiler v2.073.2

DMD is not packaged for Debian, but there is D-Apt so it is available, or Fedora, so LDC tends to be the "go to" D compiler. I haven't tried the example codes, but My GStreamer programs in D work nicely.

I am just starting to rewrite Me TV from C++14 to D.

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Russel. ============================================================================= Dr Russel Winder      t: +44 20 7585 2200   voip: sip:russel.winder@ekiga.net 41 Buckmaster Road    m: +44 7770 465 077   xmpp: russel@winder.org.uk London SW11 1EN, UK   w: www.russel.org.uk  skype: russel_winder

On Friday, 16 June 2017 at 06:45:38 UTC, Russel Winder wrote:
> Welcome to the group of people using GStreamer from D. I suspect I may be the only other member of that club.

Looks like gst-inspect hasn't been ported...  I'm looking at that now.

On Fri, 2017-06-16 at 16:11 +0000, Jay Norwood via Digitalmars-d-learn wrote:
> On Friday, 16 June 2017 at 06:45:38 UTC, Russel Winder wrote:
> > Welcome to the group of people using GStreamer from D. I suspect I may be the only other member of that club.
> 
> Looks like gst-inspect hasn't been ported...  I'm looking at that now.

gst-inspect-1.0 is an executable that comes with the installation, however that is done. What are you thinking of when saying "ported"?

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Russel. ============================================================================= Dr Russel Winder      t: +44 20 7585 2200   voip: sip:russel.winder@ekiga.net 41 Buckmaster Road    m: +44 7770 465 077   xmpp: russel@winder.org.uk London SW11 1EN, UK   w: www.russel.org.uk  skype: russel_winder

On Friday, 16 June 2017 at 16:33:56 UTC, Russel Winder wrote:

> gst-inspect-1.0 is an executable that comes with the installation, however that is done. What are you thinking of when saying "ported"?

gst-inspect is a good demonstration of iteration through the available gstreamer elements and their options. I want to modify that code to generate a model that could be used for persisting a pipeline configuration.
https://github.com/GStreamer/gstreamer/blob/master/tools/gst-inspect.c

So far, I've looked up about 80 calls used in that program, and only these few don't have c aliases in the d interfaces.  I haven't looked to see if these are macros, or perhaps I could be looking at an incompatible version of gst-inspect.c.  Anyway, looks pretty good so far.

gst_plugin_feature_get_name
g_list_next
g_return_if_fail
g_value_get_boolean

On 06/17/2017 01:34 AM, Jay Norwood wrote:
> gst_plugin_feature_get_name

This is a macro, the alternative:

```
import gobject.Value;

Value name;
feature.getProperty("name", name);
name.getString();
```

or if you don't want to use GValue.

```
to!string((cast(GstObject)feature.getPluginFeatureStruct()).name);
```

> g_list_next

https://github.com/gtkd-developers/GtkD/blob/master/generated/gtkd/glib/ListG.d#L75

> g_return_if_fail

Also a macro, witch basically does this:

```
if ( !expression )
	return;
```

> g_value_get_boolean

https://github.com/gtkd-developers/GtkD/blob/master/generated/gtkd/gobject/Value.d#L245

-- 
Mike Wey