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@edoput edoput/main.vala
Last active Oct 12, 2015

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What would you like to do?
an approach to Gstreamer with Vala
using Gst;
public int main(string args[])
{
Gst.init(ref args);
Gst.Element screen = Gst.ElementFactory.make ("ximagesrc", "source");
Gst.Element color_convert = Gst.ElementFactory.make ("videoconvert", "convert");
Gst.Element encoder = Gst.ElementFactory.make ("x264enc","encoder");
Gst.Element flv_muxer = Gst.ElementFactory.make ("flvmux", "muxer");
Gst.Element file = Gst.ElementFactory.make ("filesink", "sink");
if (screen == null || color_convert == null || encoder == null || flv_muxer == null || file == null) {
stderr.puts ("Couldn't create a element:\n");
if (screen == null) stderr.puts ("screen");
if (color_convert == null) stderr.puts ("color converter\n");
if (encoder == null) stderr.puts ("x264 encoder");
if (flv_muxer== null) stderr.puts ("flv muxer");
if (file == null) stderr.puts ("file sink");
return -1;
}
// create a pipeline
Pipeline pipe = new Pipeline ("test");
pipe.add_many (
screen,
color_convert,
encoder,
flv_muxer,
file);
// get a bus before setting playing state
Bus bus = pipe.get_bus ();
Message msg = bus.timed_pop_filtered (Gst.CLOCK_TIME_NONE, Gst.MessageType.ERROR | Gst.MessageType.EOS);
if (msg != null)
{
switch (msg.type)
{
case Gst.MessageType.ERROR:
break;
case Gst.MessageType.EOS:
stdout.puts ("Stream ended");
break;
default:
assert_not_reached();
}
}
// various check
bool pipe_link = screen.link_many (
color_convert,
encoder,
flv_muxer,
file);
if ( !pipe_link )
{
stderr.puts ("Could'n link some elements\n");
return -1;
}
// set parameters from ximagesrc
// screen.set ("use-damage", true);
screen.set ("num-buffers", 100);
// screen.set ("framerate", 25/1);
screen.set ("endx", 50);
screen.set ("endy", 50);
file.set ("location", "./test.flv");
Gst.StateChangeReturn ret = pipe.set_state (Gst.State.PLAYING);
if (ret == Gst.StateChangeReturn.FAILURE) {
stderr.puts ("Couldn't start pipeline\n");
return -1;
}
else if ( ret == Gst.StateChangeReturn.SUCCESS)
{
stdout.puts ("Pipeline is playing\n");
}
pipe.set_state (Gst.State.NULL);
return 0;
}
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