forked from jengelh/ffmpeg-4
14 lines
770 B
Diff
14 lines
770 B
Diff
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diff --git a/libavcodec/vc1_block.c b/libavcodec/vc1_block.c
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index b06ee9f..5b38183 100644
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--- a/libavcodec/vc1_block.c
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+++ b/libavcodec/vc1_block.c
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@@ -188,7 +188,7 @@ static void vc1_put_signed_blocks_clamped(VC1Context *v)
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mquant = v->altpq; \
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if ((edges&8) && s->mb_y == (s->mb_height - 1)) \
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mquant = v->altpq; \
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- if (!mquant || mquant > 31) { \
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+ if (!mquant || mquant > 31 || mquant < -31) { \
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av_log(v->s.avctx, AV_LOG_ERROR, \
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"Overriding invalid mquant %d\n", mquant); \
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mquant = 1; \
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