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#!/usr/bin/python
# freeseer - vga/presentation capture software
#
# Copyright (C) 2010 Free and Open Source Software Learning Centre
# http://fosslc.org
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# For support, questions, suggestions or any other inquiries, visit:
# the #fosslc channel on IRC (freenode.net)
import gobject, pygst
pygst.require("0.10")
import gst
class FreeSeeR:
def __init__(self, window_id):
self.window_id = window_id
self.viddrv = 'v4lsrc'
self.viddev = '/dev/video0'
self.filename = 'default.mkv'
self.video_codec = 'theoraenc'
self.audio_codec = 'vorbisenc'
self.player = gst.Pipeline("player")
# GST Video
self.vidsrc = gst.element_factory_make(self.viddrv, "vidsrc")
self.cspace = gst.element_factory_make("ffmpegcolorspace", "cspace")
self.vidtee = gst.element_factory_make("tee", "vidtee")
self.vidqueue1 = gst.element_factory_make("queue", "vidqueue1")
self.vidqueue2 = gst.element_factory_make("queue", "vidqueue2")
self.vidcodec = gst.element_factory_make(self.video_codec, "vidcodec")
self.vidsink = gst.element_factory_make("autovideosink", "vidsink")
# GST Sound
self.sndsrc = gst.element_factory_make("alsasrc", "sndsrc")
self.sndqueue = gst.element_factory_make("queue", "sndqueue")
self.audioconvert = gst.element_factory_make("audioconvert", "audioconvert")
self.sndcodec = gst.element_factory_make(self.audio_codec, "sndcodec")
# GST Muxer
self.mux = gst.element_factory_make("matroskamux", "mux")
self.filesink = gst.element_factory_make("filesink", "filesink")
self.filesink.set_property("location", 'default.mkv')
# GST Add Components
self.player.add(self.vidsrc, self.cspace, self.vidtee, self.vidqueue1, self.vidqueue2, self.vidcodec, self.vidsink)
self.player.add(self.sndsrc, self.sndqueue, self.audioconvert, self.sndcodec)
self.player.add(self.mux, self.filesink)
# GST Link Components
gst.element_link_many(self.vidsrc, self.cspace, self.vidtee)
gst.element_link_many(self.vidtee, self.vidqueue1, self.vidcodec, self.mux)
gst.element_link_many(self.vidtee, self.vidqueue2, self.vidsink)
gst.element_link_many(self.sndsrc, self.sndqueue, self.audioconvert, self.sndcodec, self.mux)
gst.element_link_many(self.mux, self.filesink)
bus = self.player.get_bus()
bus.add_signal_watch()
bus.enable_sync_message_emission()
bus.connect("message", self.on_message)
bus.connect("sync-message::element", self.on_sync_message)
def on_message(self, bus, message):
t = message.type
if t == gst.MESSAGE_EOS:
self.player.set_state(gst.STATE_NULL)
elif t == gst.MESSAGE_ERROR:
err, debug = message.parse_error()
print "Error: %s" % err, debug
self.player.set_state(gst.STATE_NULL)
def on_sync_message(self, bus, message):
if message.structure is None:
return
message_name = message.structure.get_name()
if message_name == "prepare-xwindow-id":
imagesink = message.src
imagesink.set_property("force-aspect-ratio", True)
imagesink.set_xwindow_id(self.window_id)
def change_videosrc(self, new_source, new_device):
self.viddrv = new_source
self.viddev = new_device
self.player.remove(self.vidsrc)
self.vidsrc = gst.element_factory_make(self.viddrv, "vidsrc")
self.player.add(self.vidsrc)
if (self.viddrv == 'v4lsrc'):
self.vidsrc.set_property("device", self.viddev)
elif (self.viddrv == 'v4l2src'):
self.vidsrc.set_property("device", self.viddev)
gst.element_link_many(self.vidsrc, self.cspace)
def record(self, filename):
self.filename = filename
self.filesink.set_property("location", self.filename)
self.player.set_state(gst.STATE_PLAYING)
def stop(self):
self.player.set_state(gst.STATE_NULL)
def change_video_codec(self, new_vcodec):
self.video_codec = new_vcodec
self.player.remove(self.vidcodec)
self.vidcodec = gst.element_factory_make(self.video_codec, "vidcodec")
self.player.add(self.vidcodec)
gst.element_link_many(self.vidqueue1, self.vidcodec, self.mux)
def change_audio_codec(self, new_acodec):
self.audio_codec = new_acodec
self.player.remove(self.sndcodec)
self.sndcodec = gst.element_factory_make(self.audio_codec, "sndcodec")
self.player.add(self.sndcodec)
gst.element_link_many(self.audioconvert, self.sndcodec, self.mux)
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