+ video->take_from_examiner (examiner);
+ set_default_colour_conversion ();
+
+ {
+ boost::mutex::scoped_lock lm (_mutex);
+
+ AudioStreamPtr as (new AudioStream (examiner->audio_frame_rate(), examiner->audio_channels ()));
+ audio->set_stream (as);
+ AudioMapping m = as->mapping ();
+ film()->make_audio_mapping_default (m);
+ as->set_mapping (m);
+ }
+
+ signal_changed (AudioContentProperty::STREAMS);