---
libavcodec/ffv1dec.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/libavcodec/ffv1dec.c b/libavcodec/ffv1dec.c
index f5f7a8f..c5329b4 100644
--- a/libavcodec/ffv1dec.c
+++ b/libavcodec/ffv1dec.c
@@ -273,7 +273,12 @@ static int decode_slice_header(FFV1Context *f, FFV1Context
*fs)
unsigned ps, i, context_count;
memset(state, 128, sizeof(state));
- av_assert0(f->version > 2);
+ if (fs->ac > 1) {
+ for (i = 1; i < 256; i++) {
+ fs->c.one_state[i] = f->state_transition[i];
+ fs->c.zero_state[256 - i] = 256 - fs->c.one_state[i];
+ }
+ }
fs->slice_x = get_symbol(c, state, 0) * f->width;
fs->slice_y = get_symbol(c, state, 0) * f->height;
--
1.7.12
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