--- branches/release-1_3-branch/xvidcore/src/encoder.c	2011/05/18 09:02:35	1985
+++ branches/release-1_3-branch/xvidcore/src/encoder.c	2014/11/25 23:17:01	2099
@@ -452,7 +452,7 @@
 #ifndef HAVE_PTHREAD
 		int t = MAX(1, create->num_threads);
 #else
-		int t = MIN(create->num_threads, (int) (pEnc->mbParam.mb_height>>1)); /* at least two rows per thread */
+		int t = MAX(1, MIN(create->num_threads, (int) (pEnc->mbParam.mb_height>>1))); /* at least two rows per thread */
 #endif
 		int threads_per_slice = MAX(1, (t / pEnc->num_slices));
 		int rows_per_thread = (pEnc->mbParam.mb_height + threads_per_slice - 1) / threads_per_slice;