Hi all:
    Recently I use gstreamer to develop a program.I wanna exchanging H.264 ps stream to es stream.When I use below pipeline ,it works well:

gst-launch-0.10 filesrc location=test.264 ! typefind !  mpegpsdemux  !  filesink location=es.264  

But ,When I change this way to use a python program,the es.264(filesink) is 0.

My program is :

import gi
gi.require_version('Gst', '1.0')

from gi.repository import GObject, Gst
import os,sys,threading
#from ctypes import *

GObject.threads_init()
Gst.init(None)

pipeline = Gst.Pipeline()
filesrc = Gst.ElementFactory.make('filesrc','filesrc')
filesrc.set_property('location', 'E:\\test.264')
pipeline.add(filesrc)


typefind = Gst.ElementFactory.make('typefind','typefind')
pipeline.add(typefind)


mpegpsdemux = Gst.ElementFactory.make('mpegpsdemux','mpegpsdemux')
pipeline.add(mpegpsdemux)


filesink = Gst.ElementFactory.make('filesink','filesink')
filesink.set_property('location', 'E:\\es.264')
pipeline.add(filesink)

filesrc.link(typefind)
typefind.link(mpegpsdemux)
mpegpsdemux.link(filesink)
#typefind.link(filesink)

pipeline.set_state(Gst.State.PLAYING)
print "start..."

GObject.MainLoop().run()



what is the problem????