/usr/share/gst-python/0.10/examples/decodebin.py is in python-gst0.10-dev 0.10.22-3ubuntu2.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 | #!/usr/bin/env python
# decodebin.py - Audio autopluging example using 'decodebin' element
# Copyright (C) 2006 Jason Gerard DeRose <jderose@jasonderose.org>
# 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
gobject.threads_init()
import pygst
pygst.require('0.10')
import gst
class Decodebin:
def __init__(self, location):
# The pipeline
self.pipeline = gst.Pipeline()
# Create bus and connect several handlers
self.bus = self.pipeline.get_bus()
self.bus.add_signal_watch()
self.bus.connect('message::eos', self.on_eos)
self.bus.connect('message::tag', self.on_tag)
self.bus.connect('message::error', self.on_error)
# Create elements
self.src = gst.element_factory_make('filesrc')
self.dec = gst.element_factory_make('decodebin')
self.conv = gst.element_factory_make('audioconvert')
self.rsmpl = gst.element_factory_make('audioresample')
self.sink = gst.element_factory_make('alsasink')
# Set 'location' property on filesrc
self.src.set_property('location', location)
# Connect handler for 'new-decoded-pad' signal
self.dec.connect('new-decoded-pad', self.on_new_decoded_pad)
# Add elements to pipeline
self.pipeline.add(self.src, self.dec, self.conv, self.rsmpl, self.sink)
# Link *some* elements
# This is completed in self.on_new_decoded_pad()
self.src.link(self.dec)
gst.element_link_many(self.conv, self.rsmpl, self.sink)
# Reference used in self.on_new_decoded_pad()
self.apad = self.conv.get_pad('sink')
# The MainLoop
self.mainloop = gobject.MainLoop()
# And off we go!
self.pipeline.set_state(gst.STATE_PLAYING)
self.mainloop.run()
def on_new_decoded_pad(self, element, pad, last):
caps = pad.get_caps()
name = caps[0].get_name()
print 'on_new_decoded_pad:', name
if name == 'audio/x-raw-float' or name == 'audio/x-raw-int':
if not self.apad.is_linked(): # Only link once
pad.link(self.apad)
def on_eos(self, bus, msg):
print 'on_eos'
self.mainloop.quit()
def on_tag(self, bus, msg):
taglist = msg.parse_tag()
print 'on_tag:'
for key in taglist.keys():
print '\t%s = %s' % (key, taglist[key])
def on_error(self, bus, msg):
error = msg.parse_error()
print 'on_error:', error[1]
self.mainloop.quit()
if __name__ == '__main__':
if len(sys.argv) == 2:
Decodebin(sys.argv[1])
else:
print 'Usage: %s /path/to/media/file' % sys.argv[0]
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