From 430d4f2bb52e6d1d7d375186cb5c710008a20603 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Mon, 26 Jun 2017 16:14:35 +0200 Subject: [PATCH] avcodec/ffv1enc: Allow less than 2 rows of slices for low vertical resolution Fixes: Ticket5548 Signed-off-by: Michael Niedermayer --- libavcodec/ffv1enc.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/libavcodec/ffv1enc.c b/libavcodec/ffv1enc.c index e59d540737..39b52d5a48 100644 --- a/libavcodec/ffv1enc.c +++ b/libavcodec/ffv1enc.c @@ -850,6 +850,10 @@ FF_ENABLE_DEPRECATION_WARNINGS if (s->version > 1) { int plane_count = 1 + 2*s->chroma_planes + s->transparency; s->num_v_slices = (avctx->width > 352 || avctx->height > 288 || !avctx->slices) ? 2 : 1; + + if (avctx->height < 5) + s->num_v_slices = 1; + 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;