diff --git a/src/add-ons/media/media-add-ons/video_mixer/BufferMixer.cpp b/src/add-ons/media/media-add-ons/video_mixer/BufferMixer.cpp
index 0b5d131acf..7b89e61b72 100644
--- a/src/add-ons/media/media-add-ons/video_mixer/BufferMixer.cpp
+++ b/src/add-ons/media/media-add-ons/video_mixer/BufferMixer.cpp
@@ -62,7 +62,7 @@ BufferMixer::Merge(BBuffer *input, BBuffer *output) {
 		c1    = *source++;
 		c2    = *source++;
 		c3    = *source++;
-		alpha = 128; source++;
+		alpha = *source++;
 		*destination++ = ALPHABLEND(c1, *destination, alpha);
 		*destination++ = ALPHABLEND(c2, *destination, alpha);
 		*destination++ = ALPHABLEND(c3, *destination, alpha);
diff --git a/src/add-ons/media/media-add-ons/video_mixer/VideoMixerNodeProducer.cpp b/src/add-ons/media/media-add-ons/video_mixer/VideoMixerNodeProducer.cpp
index 5fbf2a335e..ab4b86e196 100644
--- a/src/add-ons/media/media-add-ons/video_mixer/VideoMixerNodeProducer.cpp
+++ b/src/add-ons/media/media-add-ons/video_mixer/VideoMixerNodeProducer.cpp
@@ -113,6 +113,7 @@ status_t VideoMixerNode::DisposeOutputCookie(int32 cookie)
 {
 	fprintf(stderr,"VideoMixerNode(BBufferProducer)::DisposeOutputCookie\n");
 	// nothing to do since our cookies are part of the vector iterator
+	return B_OK;
 }
 
 status_t VideoMixerNode::SetBufferGroup(