diff --git a/video/out/vo.c b/video/out/vo.c
index 0130ae4387..669595f1ce 100644
--- a/video/out/vo.c
+++ b/video/out/vo.c
@@ -1182,16 +1182,9 @@ void vo_seek_reset(struct vo *vo)
 bool vo_still_displaying(struct vo *vo)
 {
     struct vo_internal *in = vo->in;
-    pthread_mutex_lock(&vo->in->lock);
-    int64_t now = mp_time_us();
-    int64_t frame_end = 0;
-    if (in->current_frame) {
-        frame_end = in->current_frame->pts + MPMAX(in->current_frame->duration, 0);
-        if (in->current_frame->display_synced)
-            frame_end = in->current_frame->num_vsyncs > 0 ? INT64_MAX : 0;
-    }
-    bool working = now < frame_end || in->rendering || in->frame_queued;
-    pthread_mutex_unlock(&vo->in->lock);
+    pthread_mutex_lock(&in->lock);
+    bool working = in->rendering || in->frame_queued;
+    pthread_mutex_unlock(&in->lock);
     return working && in->hasframe;
 }