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avcodec/ffv1enc: Allow less than 2 rows of slices for low vertical resolution

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Fixes: Ticket5548

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-06-26 16:14:35 +02:00
parent 4ed7c2bbc3
commit 430d4f2bb5
1 changed files with 4 additions and 0 deletions
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4
libavcodec/ffv1enc.c
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@ -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;