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-rw-r--r--libavfilter/af_afftfilt.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/libavfilter/af_afftfilt.c b/libavfilter/af_afftfilt.c
index 86278ef35b..28b4bda8da 100644
--- a/libavfilter/af_afftfilt.c
+++ b/libavfilter/af_afftfilt.c
@@ -188,6 +188,8 @@ static int config_input(AVFilterLink *inlink)
if (!args)
return AVERROR(ENOMEM);
+ saveptr = NULL;
+ last_expr = "1";
for (ch = 0; ch < inlink->channels; ch++) {
char *arg = av_strtok(ch == 0 ? args : NULL, "|", &saveptr);