def _initialize_video(self):
'''
Initialize video if necessary.
Note that this function must only be called by the main GTK
thread. Otherwise, dead-lock will occur. Currently, this is
ensured by calling this function in a gtk.timeout_add() call.
'''
if not self._video_initialized:
if self._gui_initialized and self._video_available\
and self.video_enabled and self.view.window_xid\
and self.video_mode:
self._video_initialized = True
selected_mode = self.video_mode_map[self.video_mode]
caps_str = GstVideoSourceManager.get_caps_string(selected_mode)
if self.recording_enabled:
bitrate = self._bitrate
record_path = self._record_path
else:
bitrate = None
record_path = None
self.view._initialize_video(str(selected_mode['device']),
str(caps_str),
record_path=record_path,
bitrate=bitrate)
self.set_app_values({'transform_matrix':
self.get_app_value('transform_matrix')})
if self.recording_enabled:
self._recording = True
else:
x, y, width, height = self.view.widget.get_allocation()
self.view._initialize_video('',
'video/x-raw-yuv,width={},height={}'
.format(width, height))
self._video_initialized = True
return True
def get_video_device_and_caps_str(self):
selected_mode = self.video_mode_map[self.video_settings]
caps_str = GstVideoSourceManager.get_caps_string(selected_mode)
return (str(selected_mode['device']), caps_str)