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-rw-r--r--libavcodec/wavpackenc.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/libavcodec/wavpackenc.c b/libavcodec/wavpackenc.c
index 299a035fc5..63971c6755 100644
--- a/libavcodec/wavpackenc.c
+++ b/libavcodec/wavpackenc.c
@@ -2487,6 +2487,9 @@ static int wavpack_encode_block(WavPackEncodeContext *s,
struct Decorr *dpp;
PutByteContext pb;
+ if (s->flags & WV_MONO_DATA) {
+ CLEAR(s->w);
+ }
if (!(s->flags & WV_MONO) && s->optimize_mono) {
int32_t lor = 0, diff = 0;