diff --git a/subprojects/gst-plugins-good/gst/isomp4/qtdemux.c b/subprojects/gst-plugins-good/gst/isomp4/qtdemux.c
index 1dc061620f..f6cb1cee4c 100644
--- a/subprojects/gst-plugins-good/gst/isomp4/qtdemux.c
+++ b/subprojects/gst-plugins-good/gst/isomp4/qtdemux.c
@@ -5373,7 +5373,12 @@ gst_qtdemux_seek_to_previous_keyframe (GstQTDemux * qtdemux)
     }
 
     /* Remember until where we want to go */
-    str->to_sample = str->from_sample - 1;
+    if (str->from_sample == 0) {
+      GST_LOG_OBJECT (qtdemux, "already at sample 0");
+      str->to_sample = 0;
+    } else {
+      str->to_sample = str->from_sample - 1;
+    }
     /* Define our time position */
     target_ts =
         str->samples[k_index].timestamp + str->samples[k_index].pts_offset;