Gstreamer

Desktop Ruby-Gnome 2
1

Hi all,

I installed the “libgstreamer0.10-ruby1.8_0.2.0-3_amd64.deb” on ubuntu
and then I tried to follow this tutorial:
http://ruby-gnome2.sourceforge.jp/hiki.cgi?tut-gst-types.

So I opended irb:
require ‘gst’
LoadError: no such file to load – gst

require ‘gst0.10’
Gst::Type
NameError: uninitialized constant Gst::Type

Is that tutorial outdated?

2

On Tue, Mar 11, 2008 at 10:39:10AM +0100, Leon B. wrote:

require ‘gst0.10’
Gst::Type
NameError: uninitialized constant Gst::Type

Is that tutorial outdated?

The tutorial is indeed outdated. It was written for Gstreamer 0.8.
Gst::Type
doesn’t exist anymore in Gstreamer 0.10. The basic ideas are still the
same
though. There isn’t ruby gstreamer 0.10 specific documentation, the best
way to
learn is the general gstreamer documentation and the ruby samples on
https://trac.luon.net/ruby-gstreamer0.10

Also feel free to ask questions on the mailinglist[0]

Sjoerd
0: https://lists.luon.net/listinfo/ruby-gstreamer0.10

Any circuit design must contain at least one part which is obsolete, two
parts
which are unobtainable, and three parts which are still under
development.

3

Thanks Sjoerd,

Do you know if Ruby-gnome2 and gstreamer is still under active
development? And are they already making it suitable for ruby1.9? I get
some errors when trying to build Ruby-gnome2 with ruby1.9.

Thanks!

4

On Tue, Mar 18, 2008 at 11:06:11PM +0100, Leon B. wrote:

Thanks Sjoerd,

Do you know if Ruby-gnome2 and gstreamer is still under active
development? And are they already making it suitable for ruby1.9? I get
some errors when trying to build Ruby-gnome2 with ruby1.9.

I personally haven’t had a lot of time for ruby-gstreamer0.10 in the
past year
or so unfortunately. I’m planning to do some basic maintaince work on it
this
weekend. But fwiw i’ve been using it in some bigger applications and it
works
nicely.

I can’t really speak for ruby-gnome2. But i guess with a new release
maintainer
there might be some new things rsn :slight_smile:

Sjoerd

For your penance, say five Hail Marys and one loud BLAH!

5

Thanks Sjoerd,

Nice idea for the Google Summer of Code!

I just compiled glib and gstreamer from scratch (with the latest ruby
1.9) and I get this error:

irb(main):006:0> require ‘glib2’
=> true
irb(main):007:0> require ‘gst0.10’
LoadError:
/home/leon/software/lib/ruby/site_ruby/1.9.0/x86_64-linux/gst010.so:
undefined symbol: rb_argv -
/home/leon/software/lib/ruby/site_ruby/1.9.0/x86_64-linux/gst010.so
from
/home/leon/software/lib/ruby/site_ruby/1.9.0/gst0.10.rb:2:in require' from /home/leon/software/lib/ruby/site_ruby/1.9.0/gst0.10.rb:2:in<top
(required)>’
from (irb):7:in require' from (irb):7 from /home/leon/software/bin/irb:12:in’
irb(main):008:0>

Do you know what I could be? Is it something I could fix?

Leon

6

On Wed, Mar 19, 2008 at 11:06:04AM +0100, Leon B. wrote:

LoadError:
from /home/leon/software/bin/irb:12:in `’
irb(main):008:0>

Do you know what I could be? Is it something I could fix?

Maybe ruby1.9 doesn’t have rb_argv anymore. Not sure. It’s one of the
things i
want to look at this weekend. But feel free to beat me to it :slight_smile:

Sjoerd

In 1750 Issac Newton became discouraged when he fell up a flight of
stairs.

7

Sjoerd S. wrote:

On Wed, Mar 19, 2008 at 11:06:04AM +0100, Leon B. wrote:

LoadError:
from /home/leon/software/bin/irb:12:in `’
irb(main):008:0>

Do you know what I could be? Is it something I could fix?

Maybe ruby1.9 doesn’t have rb_argv anymore. Not sure. It’s one of the
things i
want to look at this weekend. But feel free to beat me to it :slight_smile:

Sjoerd

In 1750 Issac Newton became discouraged when he fell up a flight of
stairs.

Edited src/rbgst.c and changed

gargc = RARRAY (rb_argv)->len;
argary = rb_argv;

in

gargc = RARRAY (argv)->len;
argary = argv;

Don’t now what I did, but it seems to work now :slight_smile:
I’ll have another look when you fixed it. Maybe then I get what rb_args
's all about.

8

Hi Sjoerd,

I saw you’ve been busy with ruby-gstreamer. Did you fix the rb_argv bug?
What was the problem?

9

When I tried to compile the edited .c file with ruby1.8.6 it succeeded.
But Gst.init() gave a segmentation fault.

10

Hi,

2008/3/25, Leon B. [email protected]:

I saw you’ve been busy with ruby-gstreamer. Did you fix the rb_argv bug?
What was the problem?

It had been fixed in Ruby/GStreamer in the Ruby-GNOME2 repository.
And it works with ruby 1.9.0.

Thanks,

kou