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-rw-r--r--libswresample/rematrix.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/libswresample/rematrix.c b/libswresample/rematrix.c
index da817e1455..e588fe973e 100644
--- a/libswresample/rematrix.c
+++ b/libswresample/rematrix.c
@@ -280,6 +280,9 @@ int swri_rematrix(SwrContext *s, AudioData *out, AudioData *in, int len, int mus
for(out_i=0; out_i<out->ch_count; out_i++){
switch(s->matrix_ch[out_i][0]){
+ case 0:
+ memset(out->ch[out_i], 0, len * (s->int_sample_fmt == AV_SAMPLE_FMT_FLT ? sizeof(float) : sizeof(int16_t)));
+ break;
case 1:
in_i= s->matrix_ch[out_i][1];
if(mustcopy || s->matrix[out_i][in_i]!=1.0){