gstreamer/examples/python/simple.py
Thibault Saunier e1fcd42a19 examples: Move all examples to the root dir and create foldersdir per language
+ Add some markdown files to link between languages
+ Add a simple 'play timeline with one clip" example in C and python
2015-12-21 15:35:17 +01:00

78 lines
2.5 KiB
Python
Executable file

#!/usr/bin/env python3
#
# GStreamer
#
# Copyright (C) 2013 Thibault Saunier <tsaunier@gnome.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., 51 Franklin Street, Suite 500,
# Boston, MA 02110-1335, USA.
import os
import gi
gi.require_version('Gst', '1.0')
gi.require_version('GES', '1.0')
from gi.repository import Gst, GES, GLib # noqa
class Simple:
def __init__(self, uri):
timeline = GES.Timeline.new_audio_video()
self.project = timeline.get_asset()
self.project.connect("asset-added", self._asset_added_cb)
self.project.connect("error-loading-asset", self._error_loading_asset_cb)
self.project.create_asset(uri, GES.UriClip)
self.layer = timeline.append_layer()
self._create_pipeline(timeline)
self.loop = GLib.MainLoop()
def _create_pipeline(self, timeline):
self.pipeline = GES.Pipeline()
self.pipeline.set_timeline(timeline)
bus = self.pipeline.get_bus()
bus.add_signal_watch()
bus.connect("message", self.bus_message_cb)
def bus_message_cb(self, unused_bus, message):
if message.type == Gst.MessageType.EOS:
print("eos")
self.loop.quit()
elif message.type == Gst.MessageType.ERROR:
error = message.parse_error()
print("error %s" % error[1])
self.loop.quit()
def start(self):
self.loop.run()
def _asset_added_cb(self, project, asset):
self.layer.add_asset(asset, 0, 0, Gst.SECOND * 5, GES.TrackType.UNKNOWN)
self.pipeline.set_state(Gst.State.PLAYING)
def _error_loading_asset_cb(self, project, error, asset_id, type):
print("Could not load asset %s: %s" % (asset_id, error))
self.loop.quit()
if __name__ == "__main__":
if len(os.sys.argv) != 2:
print("You must specify a file URI")
exit(-1)
Gst.init(None)
GES.init()
simple = Simple(os.sys.argv[1])
simple.start()