diff --git a/ultragrid/src/video_codec.c b/ultragrid/src/video_codec.c
index a23e6d4e1..52e642aa1 100644
--- a/ultragrid/src/video_codec.c
+++ b/ultragrid/src/video_codec.c
@@ -288,6 +288,27 @@ vc_copylineRGBA(unsigned char *dst, unsigned char *src, int len, int rshift,
         }
 }
 
+void vc_copylineDVS10toV210(unsigned char *dst, unsigned char *src, int dst_len)
+{
+        unsigned int *d, *s1;
+        register unsigned int a,b;
+        d = dst;
+        s1 = src;
+
+        while(dst_len > 0) {
+                a = b = *s1++;
+                b = ((b >> 24) * 0x00010101) & 0x00300c03;
+                a <<= 2;
+                b |= a & (0xff<<2);
+                a <<= 2;
+                b |= a & (0xff00<<4);
+                a <<= 2;
+                b |= a & (0xff0000<<6);
+                *d++ = b;
+                dst_len -= 4;
+        }
+}
+
 /* convert 10bits Cb Y Cr A Y Cb Y A to 8bits Cb Y Cr Y Cb Y */
 
 #if !(HAVE_MACOSX || HAVE_32B_LINUX)
diff --git a/ultragrid/src/video_codec.h b/ultragrid/src/video_codec.h
index df1185cff..0e5430275 100644
--- a/ultragrid/src/video_codec.h
+++ b/ultragrid/src/video_codec.h
@@ -109,5 +109,6 @@ void vc_copylineDVS10(unsigned char *dst, unsigned char *src, int src_len);
 void vc_copylinev210(unsigned char *dst, unsigned char *src, int dst_len);
 void vc_copyliner10k(unsigned char *dst, unsigned char *src, int len, int rshift, int gshift, int bshift);
 void vc_copylineRGBA(unsigned char *dst, unsigned char *src, int len, int rshift, int gshift, int bshift);
+void vc_copylineDVS10toV210(unsigned char *dst, unsigned char *src, int dst_len);
 
 #endif