src/framework/mlt_deque.c

[melted] / src / framework / mlt_service.c

diff --git a/src/framework/mlt_service.c b/src/framework/mlt_service.c
index a5e6df9..4619780 100644 (file)
--- a/src/framework/mlt_service.c
+++ b/src/framework/mlt_service.c
@@ -160,6 +160,11 @@ int mlt_service_connect_producer( mlt_service this, mlt_service producer, int in
        // Get the service base
        mlt_service_base *base = this->local;
 
+       // Special case 'track' index - only works for last filter(s) in a particular chain
+       // but allows a filter to apply to the output frame regardless of which track it comes from
+       if ( index == -1 )
+               index = 0;
+
        // Check if the producer is already registered with this service
        for ( i = 0; i < base->count; i ++ )
                if ( base->in[ i ] == producer )