avfilter/af_silenceremove: fix stop_silence handling

libavfilter/af_silenceremove.c

@@ -792,17 +792,20 @@ silence_copy:
                 } else if (!threshold) {
                     for (j = 0; j < outlink->channels; j++) {
                         s->update(s, in, j, nb_samples_read);
-                        if (s->stop_silence) {
+                        if (s->stop_silence)
                             s->copy(s, s->stop_silence_hold, in, j, s->stop_silence_offset, nb_samples_read);
+
+                        s->copy(s, s->stop_holdoff, in, j, s->stop_holdoff_end, nb_samples_read);
+                    }
+
+                    if (s->stop_silence) {
+                        s->stop_silence_offset++;
                         s->stop_silence_end = FFMIN(s->stop_silence_end + 1, s->stop_silence);
                         if (s->stop_silence_offset >= s->stop_silence) {
                             s->stop_silence_offset = 0;
                         }
                     }
 
-                        s->copy(s, s->stop_holdoff, in, j, s->stop_holdoff_end, nb_samples_read);
-                    }
-
                     s->window_offset++;
                     if (s->window_offset >= s->window_duration)
                         s->window_offset = 0;