From 29710dd7f2d771ca83ae3b7701b4354b5233e4f3 Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Fri, 26 May 2023 09:54:40 +0200
Subject: [PATCH] avfilter/af_silenceremove: speed-up start-only trimming once
 trim is over

---
 libavfilter/af_silenceremove.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libavfilter/af_silenceremove.c b/libavfilter/af_silenceremove.c
index 28c972f86f..a3ad0eea13 100644
--- a/libavfilter/af_silenceremove.c
+++ b/libavfilter/af_silenceremove.c
@@ -372,6 +372,12 @@ static int activate(AVFilterContext *ctx)
     if (ret < 0)
         return ret;
     if (ret > 0) {
+        if (s->start_periods == 1 && s->stop_periods == 0 &&
+            s->start_found_periods < 0) {
+            in->pts = s->next_pts;
+            s->next_pts += in->nb_samples;
+            return ff_filter_frame(outlink, in);
+        }
         if (s->start_periods == 0 && s->stop_periods == 0)
             return ff_filter_frame(outlink, in);
         return filter_frame(outlink, in);