#!/usr/bin/env python
-
+#
+# A simple "trick-mode" player to play a file at a given speed rate.
+#
# Get a test sample with:
# youtube-dl -t http://www.youtube.com/watch?v=yWa-YXiSk2Y
import sys
-import gobject
-gobject.threads_init()
+import gi
+gi.require_version('Gst', '1.0')
+from gi.repository import Gst
+Gst.init(None)
-import gst
+from gi.repository import GObject
+GObject.threads_init()
class Player:
- def __init__(self, filename, rate):
- self._filename = filename
+ def __init__(self, uri, rate):
self._rate = rate
- self._player = gst.element_factory_make("playbin2", "player")
- self._player.set_property("uri", filename)
+ self._player = Gst.ElementFactory.make("playbin", "player")
+ self._player.set_property("uri", uri)
bus = self._player.get_bus()
bus.add_signal_watch()
+ bus.connect('message::eos', self.on_eos)
+ bus.connect('message::error', self.on_error)
bus.connect('message::state-changed', self.on_state_changed)
def run(self):
- self._player.set_state(gst.STATE_PLAYING)
- loop = gobject.MainLoop()
- loop.run()
+ self._player.set_state(Gst.State.PLAYING)
+ self.loop = GObject.MainLoop()
+ self.loop.run()
+
+ def quit(self):
+ self._player.set_state(Gst.State.NULL)
+ self.loop.quit()
+
+ def on_eos(self, bus, msg):
+ self.quit()
+
+ def on_error(self, bus, msg):
+ (err, debug) = msg.parse_error()
+ print "Error: %s" % err, debug
+ self.quit()
def on_state_changed(self, bus, msg):
if msg.src != self._player:
print 'on_state_changed'
old_state, new_state, pending = msg.parse_state_changed()
print "%s -> %s" % (old_state, new_state)
- if old_state == gst.STATE_READY and new_state == gst.STATE_PAUSED:
+ if old_state == Gst.State.READY and new_state == Gst.State.PAUSED:
self.set_rate(self._rate)
def set_rate(self, rate):
self._rate = rate
- try:
- position, format = self._player.query_position(gst.FORMAT_TIME)
- except:
- position = 0
+ position = self._player.query_position(Gst.Format.TIME)[1]
# Create the seek event
- if rate > 0:
- seek_event = gst.event_new_seek(rate,
- gst.FORMAT_TIME,
- gst.SEEK_FLAG_FLUSH | gst.SEEK_FLAG_ACCURATE,
- gst.SEEK_TYPE_SET, position,
- gst.SEEK_TYPE_NONE, 0)
- else:
- seek_event = gst.event_new_seek(rate,
- gst.FORMAT_TIME,
- gst.SEEK_FLAG_FLUSH | gst.SEEK_FLAG_ACCURATE,
- gst.SEEK_TYPE_SET, 0,
- gst.SEEK_TYPE_SET, position)
+ seek_event = Gst.Event.new_seek(rate,
+ Gst.Format.TIME,
+ Gst.SeekFlags.FLUSH | Gst.SeekFlags.ACCURATE,
+ Gst.SeekType.SET, position,
+ Gst.SeekType.SET, -1)
if seek_event:
self._player.send_event(seek_event)
- gst.info("rate set to %s" % rate)
+ Gst.info("rate set to %s" % rate)
else:
- gst.warining("change rate failed")
+ Gst.warining("change rate failed")
def main(args):
def usage():
- sys.stdout.write("usage: %s <URI-OF-MEDIA-FILE>\n" % args[0])
+ sys.stdout.write("usage: %s <filename> <speedrate>\n" % args[0])
- if len(args) != 2:
+ if len(args) != 3:
usage()
sys.exit(1)
- if not gst.uri_is_valid(args[1]):
- sys.stderr.write("Error: Invalid URI: %s\n" % args[1])
- sys.exit(1)
+ uri = Gst.filename_to_uri(args[1])
+ rate = float(args[2])
- player = Player(args[1], 3.0)
+ player = Player(uri, rate)
player.run()
if __name__ == '__main__':