Copy the alpha channel in producer_consumer.

diff --git a/src/modules/core/producer_consumer.c b/src/modules/core/producer_consumer.c
index d36fc451a3b83e54a5a71b4cb4b5af7cb42325f2..8cbe49a06adc46c5106ccfe5eb1e765c42a31604 100644 (file)
--- a/src/modules/core/producer_consumer.c
+++ b/src/modules/core/producer_consumer.c
@@ -56,6 +56,15 @@ static int get_image( mlt_frame frame, uint8_t **image, mlt_image_format *format
        memcpy( new_image, *image, size );
        mlt_properties_set( properties, "progressive", mlt_properties_get( MLT_FRAME_PROPERTIES(nested_frame), "progressive" ) );
        *image = new_image;
+       
+       // Copy the alpha channel
+       uint8_t *alpha = mlt_properties_get_data( MLT_FRAME_PROPERTIES( nested_frame ), "alpha", &size );
+       if ( alpha && size > 0 )
+       {
+               new_image = mlt_pool_alloc( size );
+               memcpy( new_image, alpha, size );
+               mlt_properties_set_data( properties, "alpha", new_image, size, mlt_pool_release, NULL );
+       }
 
        return result;
 }