avcodec/ffv1enc: permit 1024 slices

Signed-off-by: Michael Niedermayer <[email protected]>

Author: JeromeMartinez

libavcodec/ffv1enc.c

@@ -569,7 +569,7 @@ int ff_ffv1_encode_determine_slices(AVCodecContext *avctx)
     int max_v_slices = AV_CEIL_RSHIFT(avctx->height, s->chroma_v_shift);
     s->num_v_slices = (avctx->width > 352 || avctx->height > 288 || !avctx->slices) ? 2 : 1;
     s->num_v_slices = FFMIN(s->num_v_slices, max_v_slices);
-    for (; s->num_v_slices < 32; s->num_v_slices++) {
+    for (; s->num_v_slices <= 32; s->num_v_slices++) {
         for (s->num_h_slices = s->num_v_slices; s->num_h_slices <= 2*s->num_v_slices; s->num_h_slices++) {
             int maxw = (avctx->width  + s->num_h_slices - 1) / s->num_h_slices;
             int maxh = (avctx->height + s->num_v_slices - 1) / s->num_v_slices;