gstreamer/examples/filesrc.py

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#!/usr/bin/env python
#
# GStreamer python bindings
# Copyright (C) 2002 David I. Lehn <dlehn@users.sourceforge.net>
# 2004 Johan Dahlin <johan@gnome.org>
#
# filesrc.py: implements a file source element completely in python
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Library General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Library General Public License for more details.
#
# You should have received a copy of the GNU Library General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
import sys
import gobject
import gst
class FileSource(gst.Element):
blocksize = 4096
fd = None
def __init__(self, name):
self.__gobject_init__()
self.set_name(name)
self.srcpad = gst.Pad('src', gst.PAD_SRC)
self.srcpad.set_get_function(self.srcpad_get)
self.add_pad(self.srcpad)
def set_property(self, name, value):
if name == 'location':
self.fd = open(value, 'r')
def srcpad_get(self, pad):
data = self.fd.read(self.blocksize)
if data:
return gst.Buffer(data)
else:
self.set_eos()
return gst.Event(gst.EVENT_EOS)
gobject.type_register(FileSource)
def main(args):
print 'This example is not finished yet.'
return
if len(args) != 3:
print 'Usage: %s input output' % (args[0])
return -1
bin = gst.Pipeline('pipeline')
filesrc = FileSource('filesource')
#filesrc = gst.Element('filesrc', 'src')
assert filesrc
filesrc.set_property('location', args[1])
filesink = gst.element_factory_make('filesink', 'sink')
filesink.set_property('location', args[2])
bin.add_many(filesrc, filesink)
gst.element_link_many(filesrc, filesink)
bin.set_state(gst.STATE_PLAYING);
while bin.iterate():
pass
bin.set_state(gst.STATE_NULL)
if __name__ == '__main__':
sys.exit(main(sys.argv))