basic structure of videomixer dedicated to voc/fem requirements

1 files changed, 69 insertions, 0 deletions

diff --git a/voctocat/videomix.py b/voctocat/videomix.py
new file mode 100644
index 0000000..895a25f
--- /dev/null
+++ b/voctocat/videomix.py
@@ -0,0 +1,69 @@
+import sys, inspect
+from pprint import pprint
+from gi.repository import GLib, Gst
+
+class Videomix:
+	decoder = []
+	mixerpads = []
+
+	def __init__(self):
+		self.pipeline = Gst.Pipeline()
+
+		self.videomixer = Gst.ElementFactory.make('videomixer', 'videomixer')
+		self.pipeline.add(self.videomixer)
+
+		for uri in ("http://video.blendertestbuilds.de/download.blender.org/ED/ED_1280.avi", "http://download.blender.org/durian/trailer/sintel_trailer-720p.mp4",):
+			decoder = Gst.ElementFactory.make('uridecodebin', 'uridecoder('+uri+')')
+			decoder.set_property("uri", uri)
+			decoder.connect("pad-added", self.OnDynamicPad)
+			self.pipeline.add(decoder)
+			self.decoder.append(decoder)
+
+		self.monitorvideosink = Gst.ElementFactory.make('autovideosink', 'monitorvideosink')
+		self.pipeline.add(self.monitorvideosink)
+		self.videomixer.link(self.monitorvideosink)
+
+		self.monitoraudiosink = Gst.ElementFactory.make('autoaudiosink', 'monitoraudiosink')
+		self.pipeline.add(self.monitoraudiosink)
+
+		self.pipeline.set_state(Gst.State.PLAYING)
+
+		GLib.io_add_watch(sys.stdin, GLib.IO_IN, self.Input)
+
+	def Input(self, fd, condition):
+		if condition == GLib.IO_IN:
+			char = fd.readline()
+			try:
+				i = int(char.rstrip())
+				print("settinh pad {0} to alpha=1".format(i))
+				self.mixerpads[i].set_property('alpha', 1)
+				for idx, pad in enumerate(self.mixerpads):
+					if idx != i:
+						print("settinh pad {0} to alpha=0".format(idx))
+						pad.set_property('alpha', 0)
+			except:
+				pass
+
+			return True
+		else:
+			return False
+
+	def OnDynamicPad(self, uridecodebin, src_pad):
+		caps = src_pad.query_caps(None).to_string()
+		srcname = uridecodebin.get_name()
+		print("{0}-source of {1} online".format(caps.split(',')[0], srcname))
+
+		if caps.startswith('audio/'):
+			sinkpad = self.monitoraudiosink.get_static_pad("sink")
+
+			# link the first audio-stream and be done
+			if not sinkpad.is_linked():
+				src_pad.link(sinkpad)
+
+		else:
+			sinkpad = Gst.Element.get_request_pad(self.videomixer, "sink_%u")
+			src_pad.link(sinkpad)
+			self.mixerpads.append(sinkpad)
+			print('add', sinkpad)
+			sinkpad.set_property('alpha', 0.7)
+