[FFmpeg-cvslog] avfilter/avf_showcwt: fix offset to take into initial delay

[Paul B Mahol]

ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Wed Jul  5 23:02:08 2023 +0200| [3bbb1c023b0e00324c133a86ebb0a955dd8dea0f] | committer: Paul B Mahol

avfilter/avf_showcwt: fix offset to take into initial delay

Syncs audio with video.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=3bbb1c023b0e00324c133a86ebb0a955dd8dea0f
---

 libavfilter/avf_showcwt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavfilter/avf_showcwt.c b/libavfilter/avf_showcwt.c
index cc8740fb82..0ee4414ea2 100644
--- a/libavfilter/avf_showcwt.c
+++ b/libavfilter/avf_showcwt.c
@@ -868,7 +868,7 @@ static int output_frame(AVFilterContext *ctx)
     if (s->slide != SLIDE_FRAME || s->new_frame == 1) {
         int64_t pts_offset = s->new_frame ? 0LL : av_rescale(s->ihop_index, s->hop_size, s->ihop_size);
 
-        pts_offset = av_rescale_q(pts_offset, av_make_q(1, inlink->sample_rate), inlink->time_base);
+        pts_offset = av_rescale_q(pts_offset - 16384LL, av_make_q(1, inlink->sample_rate), inlink->time_base);
         s->outpicref->pts = av_rescale_q(s->in_pts + pts_offset, inlink->time_base, outlink->time_base);
         s->outpicref->duration = 1;
     }