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-rw-r--r--libavfilter/avf_showwaves.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libavfilter/avf_showwaves.c b/libavfilter/avf_showwaves.c
index 645065f33d..90d3ec9441 100644
--- a/libavfilter/avf_showwaves.c
+++ b/libavfilter/avf_showwaves.c
@@ -196,7 +196,7 @@ static void filter_samples(AVFilterLink *inlink, AVFilterBufferRef *insamples)
/* draw data in the buffer */
for (i = 0; i < nb_samples; i++) {
- if (showwaves->buf_idx == 0) {
+ if (showwaves->buf_idx == 0 && showwaves->sample_count_mod == 0) {
showwaves->outpicref = outpicref =
ff_get_video_buffer(outlink, AV_PERM_WRITE|AV_PERM_ALIGN,
outlink->w, outlink->h);