def create_interaudiosrc_and_connections(self):
'''
The audio equivalent of create_intervideosrc_and_connections
'''
mixer = self.session().mixers[0]
source = mixer.sources.get_for_input_or_mixer(self)
if not source:
raise Exception('Cannot find source for input %d with mixer %d' %
(self.id, mixer.id))
# Create the receiving 'inter' elements to accept the AV into the main pipeline
interaudiosrc = source.add_element('interaudiosrc')
self.interaudiosrc_src_pad = interaudiosrc.get_static_pad('src')
# Blocks the src pad to stop incomplete messages.
# Note, this has caused issues in the past.
self._block_interaudiosrc_src_pad()
# Give the 'inter' elements a channel name. It doesn't matter what, so long as they're unique.
channel_name = create_intersink_channel_name()
self.interaudiosink.set_property('channel', channel_name)
interaudiosrc.set_property('channel', channel_name)
self.audio_pad_to_connect_to_mix = interaudiosrc.get_static_pad('src')
def _create_inter_elements(self, audio_or_video):
'''
Creates intervideosrc and intervideosink (or the equivalent audio ones)
'''
intersrc = self._create_intersrc(audio_or_video)
intersink = self._create_intersink(audio_or_video)
# Give the 'inter' elements a channel name. It doesn't matter what, so long as they're unique.
channel_name = create_intersink_channel_name()
intersink.set_property('channel', channel_name)
intersrc.set_property('channel', channel_name)
return intersrc, intersink
def create_interaudiosink_and_connections(self):
'''
interaudiosink/interaudiosrc are used to connect the master pipeline
with the local pipeline for this output.
'''
self.interaudiosink = self.source.add_element('interaudiosink', self)
self.audio_element_multiqueue_should_connect_to = self.interaudiosink
channel_name = create_intersink_channel_name()
self.interaudiosrc.set_property('channel', channel_name)
self.interaudiosink.set_property('channel', channel_name)
# We block the source (output) pad of this interaudiosrc until we're sure audio is being sent.
# Otherwise we can get a partial message, which causes an error.
# We don't need to do this if the other one is playing.
if self.source.get_state() not in [Gst.State.PLAYING, Gst.State.PAUSED]:
block_pad(self, 'interaudiosrc_src_pad')
def create_intervideosrc_and_connections(self):
'''
Create the 'intervideosrc' element, which accepts the video input that's come from a separate pipeline.
Then connects intervideosrc to the convert/scale/queue elements, ready for mixing.
'''
mixer = self.session().mixers[0]
source = mixer.sources.get_for_input_or_mixer(self)
if not source:
raise Exception('Cannot find source for input %d with mixer %d' %
(self.id, mixer.id))
# Create the receiving 'inter' element to accept the AV into the main pipeline
intervideosrc = source.add_element('intervideosrc')
self.intervideosrc_src_pad = intervideosrc.get_static_pad('src')
# We ask the src to hold the frame for 24 hours (basically, a very long time)
# This is optional, but prevents it from going black when it's better to show the last frame.
intervideosrc.set_property('timeout', Gst.SECOND * 60 * 60 * 24)
# We block the source (output) pad of this intervideosrc until we're sure video is being sent.
# Otherwise we can get a partial message, which causes an error.
self._block_intervideosrc_src_pad()
# Give the 'inter' elements a channel name. It doesn't matter what, so long as they're unique.
channel_name = create_intersink_channel_name()
self.intervideosink.set_property('channel', channel_name)
intervideosrc.set_property('channel', channel_name)
videoscale = source.add_element('videoscale')
intervideosrc.link(videoscale)
# Decent scaling options:
videoscale.set_property('method', 3)
videoscale.set_property('dither', True)
self.capsfilter_after_intervideosrc = source.add_element('capsfilter')
videoscale.link(self.capsfilter_after_intervideosrc)
queue = source.add_element('queue', name='video_queue')
self.capsfilter_after_intervideosrc.link(queue)
self.video_pad_to_connect_to_mix = queue.get_static_pad('src')
def create_intervideosink_and_connections(self):
'''
intervideosink/intervidesrc are used to connect the master pipeline
with the local pipeline for this output.
'''
self.intervideosink = self.source.add_element('intervideosink', self)
self.video_element_multiqueue_should_connect_to = self.intervideosink
channel_name = create_intersink_channel_name()
self.intervideosrc.set_property('channel', channel_name)
self.intervideosink.set_property('channel', channel_name)
# We block the source (output) pad of this intervideosrc until we're sure video is being sent.
# Otherwise the output pipeline will have a 'not negotiated' error if it starts before the other one.
# We don't need to do this if the other one is playing.
# Note: without this things work *most* of the time.
# 'test_image_input' is an example that fails without it.
if self.source.get_state() not in [Gst.State.PLAYING, Gst.State.PAUSED]:
block_pad(self, 'intervideosrc_src_pad')
