diff --git a/veejay-current/veejay-server/libvje/effects/fibdownscale.c b/veejay-current/veejay-server/libvje/effects/fibdownscale.c
index 741db7af..2e70b0a5 100644
--- a/veejay-current/veejay-server/libvje/effects/fibdownscale.c
+++ b/veejay-current/veejay-server/libvje/effects/fibdownscale.c
@@ -51,8 +51,8 @@ vj_effect *fibdownscale_init(int w, int h)
 static void fibdownscale1_apply(VJFrame *frame, VJFrame *frame2)
 {
 	unsigned i, f1;
-	unsigned int len = frame->len >> 1;
-	unsigned int uv_len = (frame->ssm ? frame->len : frame->uv_len) >> 1;
+	const int len = frame->len >> 1;
+	const int uv_len = (frame->ssm ? frame->len : frame->uv_len) >> 1;
 
 	uint8_t *Y = frame->data[0];
 	uint8_t *Cb = frame->data[1];
diff --git a/veejay-current/veejay-server/libvje/effects/flare.c b/veejay-current/veejay-server/libvje/effects/flare.c
index e357e17b..2d07b73f 100644
--- a/veejay-current/veejay-server/libvje/effects/flare.c
+++ b/veejay-current/veejay-server/libvje/effects/flare.c
@@ -219,7 +219,7 @@ static void flare_darken(VJFrame *frame, VJFrame *frame2, int w, int h, int op_a
 static void	flare_simple( VJFrame *frame, VJFrame *frame2, int w, int h, int op_a )
 {
 	unsigned int i;
- 	unsigned int len = w* h;
+	const int len = frame->len;
 	uint8_t *Y = frame->data[0];
 	uint8_t *Y2 = frame2->data[0];
 
diff --git a/veejay-current/veejay-server/libvje/effects/lumamagick.c b/veejay-current/veejay-server/libvje/effects/lumamagick.c
index 20aa7fa4..895c7b1f 100644
--- a/veejay-current/veejay-server/libvje/effects/lumamagick.c
+++ b/veejay-current/veejay-server/libvje/effects/lumamagick.c
@@ -266,7 +266,7 @@ static void lumamagick_divide(VJFrame *frame, VJFrame *frame2 , int op_a, int op
 static void lumamagick_negdiv(VJFrame *frame, VJFrame *frame2, int op_a ,int op_b )
 {
 	unsigned int i;
-	unsigned int len = frame->width * frame->height;
+	const int len = frame->len;
 	uint8_t *Y = frame->data[0];
 	uint8_t *Y2 = frame2->data[0];
 	int b, c;
diff --git a/veejay-current/veejay-server/libvje/effects/magicalphaoverlays.c b/veejay-current/veejay-server/libvje/effects/magicalphaoverlays.c
index de936ed5..5232d3f7 100644
--- a/veejay-current/veejay-server/libvje/effects/magicalphaoverlays.c
+++ b/veejay-current/veejay-server/libvje/effects/magicalphaoverlays.c
@@ -168,7 +168,7 @@ static void overlayalphamagic_divide(VJFrame *frame, VJFrame *frame2)
 
 static void overlayalphamagic_additive(VJFrame *frame, VJFrame *frame2)
 {
-    unsigned int len = frame->len;
+    int len = frame->len;
   	uint8_t *A = frame->data[3];
     uint8_t *A2 = frame2->data[3];
 
diff --git a/veejay-current/veejay-server/libvje/effects/magicoverlaysalpha.c b/veejay-current/veejay-server/libvje/effects/magicoverlaysalpha.c
index a91dad7b..ca69b8a2 100644
--- a/veejay-current/veejay-server/libvje/effects/magicoverlaysalpha.c
+++ b/veejay-current/veejay-server/libvje/effects/magicoverlaysalpha.c
@@ -204,7 +204,7 @@ static void overlaymagicalpha_divide(VJFrame *frame, VJFrame *frame2)
 static void overlaymagicalpha_additive(VJFrame *frame, VJFrame *frame2)
 {
     
-    unsigned int len = frame->len;
+    int len = frame->len;
   	uint8_t *Y = frame->data[0];
     uint8_t *Y2 = frame2->data[0];
 	uint8_t *aA = frame->data[3];