[gstreamer-bugs] [Bug 518010] New: gnlfilesource has unexpected media-start behavior

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gnonlin | Ver: 0.10.9
           Summary: gnlfilesource has unexpected media-start behavior
           Product: GStreamer
           Version: 0.10.9
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gnonlin
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: dskippy at ccs.neu.edu
         QAContact: bilboed at bilboed.com
                CC: dskippy at ccs.neu.edu
     GNOME version: Unspecified
   GNOME milestone: Unspecified


# In this program the first filesource plays the first two seconds of my audio
# file (passed in the first argument) and the second plays the next two
seconds.
# The start time of the second filesource is 2, which means that it should
start
# right after the first filesource but it does not, it waits for 2 more seconds
# and starts 4 seconds in. When I make the media-start property of the second
# filesource 0, it does start right after the first filesource with not pause.
# Of course it then plays the first two seconds of the file over again, rather
# than the next two.

#!/usr/bin/python
import pygst
pygst.require("0.10")
import gst
import gobject
import sys

def OnPad(comp, pad):
        convpad = compconvert.get_compatible_pad(pad, pad.get_caps())
        pad.link(convpad)

pipeline = gst.Pipeline()
comp = gst.element_factory_make("gnlcomposition")
pipeline.add(comp)
comp.connect("pad-added", OnPad)

compconvert = gst.element_factory_make("audioconvert")
pipeline.add(compconvert)

sink = gst.element_factory_make("alsasink")
pipeline.add(sink)
compconvert.link(sink)

audio1 = gst.element_factory_make("gnlfilesource")
comp.add(audio1)
audio1.set_property("location", sys.argv[1])
audio1.set_property("start", 0 * gst.SECOND)
audio1.set_property("duration", 2 * gst.SECOND)
audio1.set_property("media-start", 0 * gst.SECOND)
audio1.set_property("media-duration", 2 * gst.SECOND)

audio2 = gst.element_factory_make("gnlfilesource")
comp.add(audio2)
audio2.set_property("location", sys.argv[1])
audio2.set_property("start", 2 * gst.SECOND)
audio2.set_property("duration", 2 * gst.SECOND)
audio2.set_property("media-start", 2 * gst.SECOND)
audio2.set_property("media-duration", 2 * gst.SECOND)

pipeline.set_state(gst.STATE_PLAYING)
gobject.MainLoop().run()


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