Re: Porting perl-GStreamer to gst 1.0

[vividsnow <vividsnow gmail com>]

hi

try Glib::Object::Introspection::GValueWrapper like here:
https://gist.github.com/vividsnow/06e8eb21165d6f01a8bf#file-gstreamer-video-test-pl-L17


On 11/20/2014 05:52 AM, Timm Murray wrote:
> Moved the namespace to GStreamer1.  Renamed the github repo as well:
>
> https://github.com/frezik/GStreamer1
>
> I also cleaned up the examples to be more idiomatic.
>
> I'm getting stuck on how to set parameters on the caps.  What I have now is:
>
>     my $caps = GStreamer1::Caps->new_empty_simple( 'video/x-h264' );
>     $caps->set_value( width => 800 );
>     $caps->set_value( height => 600 );
>
>
> This gives me the error "Cannot convert arbitrary SV to GValue".
>
> In the original GStreamer Perl module, setting caps was done something like this:
>
>     my $caps = GStreamer::Caps::Simple->new( 'video/x-h264',
>         alignment       => 'Glib::String' => 'au',
>         'stream-format' => 'Glib::String' => 'byte-stream',
>     );
>
> This constructor, in particular setting the Glib type, seems to be a bit of syntactic sugar handled here:
>
> https://metacpan.org/source/XAOC/GStreamer-0.19/xs/GstCaps.xs
>
> Around line 46.
>
> Is there a way to coerce the type information?
>
> Thanks,
> Timm
>
> On Tue, Nov 18, 2014 at 4:09 PM, Timm Murray <tmurray wumpus-cave net <mailto:tmurray wumpus-cave net>> 
> wrote:
>
>     I should be coming back around to this over the next few days.  I probably will cleanup the examples 
> along those lines.
>
>     My main priority is getting a more complex pipeline going with callbacks on a fakesink.  That should 
> provide a solid example, and hit on my original goal for the
>     project (getting still images and video off the Raspberry Pi camera without an external program).
>
>     Thanks,
>     Timm
>
>     On Tue, Nov 18, 2014 at 2:42 PM, Torsten Schoenfeld <kaffeetisch gmx de <mailto:kaffeetisch gmx de>> 
> wrote:
>
>         On 13.11.2014 00:01, Timm Murray wrote:
>         > Thanks, I was able to get a basic pipeline going:
>         >
>         > https://github.com/frezik/Gst
>
>         I don't know if you've changed it yet, but in your examples/hello.pl <http://hello.pl>,
>         you can write some things more idiomatically.  Instead of
>
>         Gst::Element::set_state( $pipeline, "playing" );
>         my $bus = Gst::Element::get_bus( $pipeline );
>         my $msg = $bus->timed_pop_filtered( Gst::CLOCK_TIME_NONE,
>                                             [ 'error', 'eos' ]);
>         Gst::Element::set_state( $pipeline, "null" );
>
>         make use of the class hierarchy to write
>
>         $pipeline->set_state( "playing" );
>         my $bus = $pipeline->get_bus;
>         my $msg = $bus->timed_pop_filtered( Gst::CLOCK_TIME_NONE,
>                                             [ 'error', 'eos' ]);
>         $pipeline->set_state( "null" );
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