diff --git a/libobs/media-io/format-conversion.c b/libobs/media-io/format-conversion.c
index 99f366c6c..1c6d34105 100644
--- a/libobs/media-io/format-conversion.c
+++ b/libobs/media-io/format-conversion.c
@@ -208,7 +208,7 @@ void decompress_420(
 		uint8_t *output, uint32_t out_linesize)
 {
 	uint32_t start_y_d2 = start_y/2;
-	uint32_t width_d2   = min_uint32(in_linesize[0], out_linesize)/2;
+	uint32_t width_d2   = in_linesize[0]/2;
 	uint32_t height_d2  = end_y/2;
 	uint32_t y;
 
@@ -221,18 +221,18 @@ void decompress_420(
 
 		lum0 = input[0] + y * 2 * in_linesize[0];
 		lum1 = lum0 + in_linesize[0];
-		output0 = (uint32_t*)(output + y * 2 * in_linesize[0]);
-		output1 = (uint32_t*)((uint8_t*)output0 + in_linesize[0]);
+		output0 = (uint32_t*)(output + y * 2 * out_linesize);
+		output1 = (uint32_t*)((uint8_t*)output0 + out_linesize);
 
 		for (x = 0; x < width_d2; x++) {
 			uint32_t out;
-			out = (*(chroma0++) << 8) | (*(chroma1++) << 16);
+			out = (*(chroma0++) << 8) | *(chroma1++);
 
-			*(output0++) = *(lum0++) | out;
-			*(output0++) = *(lum0++) | out;
+			*(output0++) = (*(lum0++) << 16) | out;
+			*(output0++) = (*(lum0++) << 16) | out;
 
-			*(output1++) = *(lum1++) | out;
-			*(output1++) = *(lum1++) | out;
+			*(output1++) = (*(lum1++) << 16) | out;
+			*(output1++) = (*(lum1++) << 16) | out;
 		}
 	}
 }