avcodec/dpx: add support for special encoding

libavcodec/dpx.c

@@ -422,6 +422,7 @@ static int decode_frame(AVCodecContext *avctx,
                     read10in32(&buf, &rgbBuffer,
                                &n_datum, endian, shift);
             }
+            if (memcmp(input_device, "Scanity", 7))
                 n_datum = 0;
             for (i = 0; i < elements; i++)
                 ptr[i] += p->linesize[i];