mlt_properties_set_double( b_props, "audio.mix", mix );
// Initialise transition previous mix value to prevent an inadvertant jump from 0
- if ( mlt_properties_get( properties, "previous_mix" ) == NULL )
- mlt_properties_set_double( properties, "previous_mix", mlt_properties_get_double( b_props, "audio.mix" ) );
+ mlt_position last_position = mlt_properties_get_position( properties, "_last_position" );
+ mlt_position current_position = mlt_frame_get_position( b_frame );
+ if ( mlt_properties_get( properties, "_previous_mix" ) == NULL
+ || current_position != last_position + 1 )
+ mlt_properties_set_double( properties, "_previous_mix", mix );
// Tell b frame what the previous mix level was
- mlt_properties_set_double( b_props, "audio.previous_mix", mlt_properties_get_double( properties, "previous_mix" ) );
+ mlt_properties_set_double( b_props, "audio.previous_mix", mlt_properties_get_double( properties, "_previous_mix" ) );
// Save the current mix level for the next iteration
- mlt_properties_set_double( properties, "previous_mix", mlt_properties_get_double( b_props, "audio.mix" ) );
+ mlt_properties_set_double( properties, "_previous_mix", mlt_properties_get_double( b_props, "audio.mix" ) );
mlt_properties_set_double( b_props, "audio.reverse", mlt_properties_get_double( properties, "reverse" ) );
}