if (property == AudioContentProperty::AUDIO_MAPPING) {
_mapping->set (acs ? acs->audio_mapping () : AudioMapping ());
_sizer->Layout ();
} else if (property == FFmpegContentProperty::AUDIO_STREAM) {
setup_stream_description ();
_mapping->set (acs ? acs->audio_mapping () : AudioMapping ());
if (property == AudioContentProperty::AUDIO_MAPPING) {
_mapping->set (acs ? acs->audio_mapping () : AudioMapping ());
_sizer->Layout ();
} else if (property == FFmpegContentProperty::AUDIO_STREAM) {
setup_stream_description ();
_mapping->set (acs ? acs->audio_mapping () : AudioMapping ());