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# -*- coding: utf-8 -*-
# Copyright 2012 Activity Central, Inc., Ariel Calzada - ariel@activitycentral.com
# Copyright 2012 Activity Central, Inc., Flavio Danesse - flavio@activitycentral.com
#
# 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/>.
# gobject used for subclassing and finally for managing signals
import gobject
# gstreamer
import gst
# os
import os
# time lib used for saving time of video
import time
class ScreencastGstreamer(gobject.GObject):
__gsignals__ = {
"update-info": (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE, (gobject.TYPE_STRING,gobject.TYPE_STRING,))
}
def __init__(self, videofile):
""" Constructor
"""
super(ScreencastGstreamer, self).__init__()
self._audioitems = False
self._startclock = False
self._videofile = videofile
self._pipeline = False
self._timer = False
self._oggmux = False
self._videoitems = False
self._filesink = False
def stop(self):
""" Stop recording
"""
if self._timer:
gobject.source_remove(self._timer)
self._timer = False
self._pipeline.set_state(gst.STATE_PAUSED)
self._pipeline.set_state(gst.STATE_NULL)
def start(self, recordsound):
""" Start recording
"""
if self._pipeline:
del(self._pipeline)
if self._timer:
gobject.source_remove(self._timer)
self._timer = None
self.createPipeline()
self.addItems(recordsound)
self.linkItems(recordsound)
self._pipeline.set_state(gst.STATE_PLAYING)
self._startclock = time.time()
self._timer = gobject.timeout_add(1000, self.updateInfo)
def addItems(self, recordsound):
""" Add items to pipeline
"""
for videoitem in self._videoitems:
self._pipeline.add(videoitem)
if recordsound:
for audioitem in self._audioitems:
self._pipeline.add(audioitem)
self._pipeline.add(self._oggmux)
self._pipeline.add(self._filesink)
def linkItems(self, recordsound):
""" Link items to pipeline
"""
if recordsound:
l1 = self._videoitems
l1.append(self._oggmux)
gst.element_link_many(*l1)
l2 = self._audioitems
l2.append(self._oggmux)
gst.element_link_many(*l2)
gst.element_link_many(
self._oggmux,
self._filesink
)
else:
l = self._videoitems
l.append(self._oggmux)
l.append(self._filesink)
gst.element_link_many(*l)
def updateInfo(self):
""" Update info
"""
videofilesize = "0 Kb"
videolength = "%s s" % ( int(time.time() - self._startclock))
if os.path.exists(self._videofile):
videofilesize = "%s Kb" % ( int(int(os.path.getsize(self._videofile)) / 1024))
self.emit('update-info', videofilesize, videolength)
return True
def createVideoItems(self):
""" Create video items
"""
ximagesrc = gst.element_factory_make('ximagesrc', "ximagesrc")
ximagesrc.set_property('startx', 0)
ximagesrc.set_property('endx', 1200)
ximagesrc.set_property('starty', 0)
ximagesrc.set_property('endy', 900)
ffmpegcolorspace = gst.element_factory_make('ffmpegcolorspace', "ffmpegcolorspace")
videoscale = gst.element_factory_make("videoscale", "videoscale")
videocaps = gst.element_factory_make("capsfilter", "videocapsfilter")
videocaps.set_property("caps", gst.Caps("video/x-raw-yuv,width=640,height=480"))
theoraenc = gst.element_factory_make('theoraenc', 'theoraenc')
videoqueue = gst.element_factory_make('queue', "videoqueue")
videoqueue.set_property('max-size-buffers', 8000)
videoqueue.set_property('max-size-bytes', 0)
videoqueue.set_property('max-size-time', 0)
self._videoitems = [ ximagesrc, ffmpegcolorspace, videoscale, videocaps, theoraenc, videoqueue ]
def createAudioItems(self):
""" Create audio items
"""
autoaudiosrc = gst.element_factory_make('autoaudiosrc', "autoaudiosrc")
audiorate = gst.element_factory_make("audiorate", "audiorate")
audiorate.set_property('silent', True)
audiorate.set_property('tolerance', 1000)
audiocaps = gst.element_factory_make("capsfilter", "audiocapsfilter")
audiocaps.set_property("caps", gst.Caps("audio/x-raw-int,rate=8000,channels=1,width=16,depth=16"))
audioconvert = gst.element_factory_make('audioconvert', "audioconvert")
vorbisenc = gst.element_factory_make('vorbisenc', "vorbisenc")
soundqueue = gst.element_factory_make('queue', "audioqueue")
soundqueue.set_property('max-size-buffers', 10000)
soundqueue.set_property('max-size-bytes', 0)
soundqueue.set_property('max-size-time', 0)
self._audioitems = [ autoaudiosrc, audiorate, audiocaps, audioconvert, vorbisenc, soundqueue ]
def createPipeline(self):
""" Create pipeline
gst-launch-0.10 ximagesrc startx=0 endx=1200 starty=0 endy=900 ! \
ffmpegcolorspace ! \
videoscale ! \
video/x-raw-yuv,width=640,height=480 ! \
theoraenc ! \
queue max-size-buffers=10000 max-size-bytes=0 max-size-time=0 ! \
mux. oggmux name=mux \
autoaudiosrc ! \
audiorate silent=True tolerance=1000 ! \
audio/x-raw-int,width=16,depth=16,rate=8000,channels=1 ! \
audioconvert ! \
vorbisenc ! \
queue max-size-buffers=10000 max-size-bytes=0 max-size-time=0 ! \
mux. mux. ! \
filesink location=video.ogg
"""
self._pipeline = gst.Pipeline("player")
self.createVideoItems()
self.createAudioItems()
self._oggmux = gst.element_factory_make('oggmux', "oggmux")
self._filesink = gst.element_factory_make('filesink', "filesink")
self._filesink.set_property("location", self._videofile)
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