X-Git-Url: http://research.m1stereo.tv/gitweb?a=blobdiff_plain;f=src%2Fframework%2Fmlt_playlist.c;h=27c44435271f1423ac1adc68c930057d5c86fdb7;hb=803598588d14d90ced4324a90456bca641f17bc9;hp=084af24f55a3acc0cf576b4645f9c349cfde012d;hpb=b85660b63fd9e5becfdbea592a28ae18fa5f991e;p=melted

diff --git a/src/framework/mlt_playlist.c b/src/framework/mlt_playlist.c
index 084af24..27c4443 100644
--- a/src/framework/mlt_playlist.c
+++ b/src/framework/mlt_playlist.c
@@ -132,28 +132,31 @@ static int mlt_playlist_virtual_refresh( mlt_playlist this )
 	{
 		// Get the producer
 		mlt_producer producer = this->list[ i ]->producer;
-		int current_length = mlt_producer_get_out( producer ) - mlt_producer_get_in( producer ) + 1;
-
-		// Check if the length of the producer has changed
-		if ( this->list[ i ]->frame_in != mlt_producer_get_in( producer ) ||
-			 this->list[ i ]->frame_out != mlt_producer_get_out( producer ) )
+		if ( producer )
 		{
-			// This clip should be removed...
-			if ( current_length < 1 )
-			{
-				this->list[ i ]->frame_in = 0;
-				this->list[ i ]->frame_out = -1;
-				this->list[ i ]->frame_count = 0;
-			}
-			else 
+			int current_length = mlt_producer_get_out( producer ) - mlt_producer_get_in( producer ) + 1;
+	
+			// Check if the length of the producer has changed
+			if ( this->list[ i ]->frame_in != mlt_producer_get_in( producer ) ||
+				this->list[ i ]->frame_out != mlt_producer_get_out( producer ) )
 			{
-				this->list[ i ]->frame_in = mlt_producer_get_in( producer );
-				this->list[ i ]->frame_out = mlt_producer_get_out( producer );
-				this->list[ i ]->frame_count = current_length;
+				// This clip should be removed...
+				if ( current_length < 1 )
+				{
+					this->list[ i ]->frame_in = 0;
+					this->list[ i ]->frame_out = -1;
+					this->list[ i ]->frame_count = 0;
+				}
+				else 
+				{
+					this->list[ i ]->frame_in = mlt_producer_get_in( producer );
+					this->list[ i ]->frame_out = mlt_producer_get_out( producer );
+					this->list[ i ]->frame_count = current_length;
+				}
+	
+				// Update the producer_length
+				this->list[ i ]->producer_length = current_length;
 			}
-
-			// Update the producer_length
-			this->list[ i ]->producer_length = current_length;
 		}
 
 		// Calculate the frame_count
@@ -518,7 +521,7 @@ mlt_position mlt_playlist_clip( mlt_playlist this, mlt_whence whence, int index
 
 int mlt_playlist_get_clip_info( mlt_playlist this, mlt_playlist_clip_info *info, int index )
 {
-	int error = index < 0 || index >= this->count;
+	int error = index < 0 || index >= this->count || this->list[ index ]->producer == NULL;
 	memset( info, 0, sizeof( mlt_playlist_clip_info ) );
 	if ( !error )
 	{
@@ -590,7 +593,10 @@ int mlt_playlist_append_io( mlt_playlist this, mlt_producer producer, mlt_positi
 int mlt_playlist_blank( mlt_playlist this, mlt_position length )
 {
 	// Append to the virtual list
-	return mlt_playlist_virtual_append( this, &this->blank, 0, length );
+	if (length >= 0) 
+		return mlt_playlist_virtual_append( this, &this->blank, 0, length );
+	else 
+		return 1;
 }
 
 /** Insert a producer into the playlist.