make sure stream is not selfstream before skipping silence

model/stream.go

@@ -411,8 +411,12 @@ func (s Stream) ToDTO() StreamDTO {
 	}
 }
 
-// FirstSilenceAsProgress returns the end of the first silence as a float between 0 and 1
+// FirstSilenceAsProgress returns the end of the first silence as a quotient of the length of the stream
 func (s Stream) FirstSilenceAsProgress() float64 {
+	// Sanity check: first silence at beginning of stream
+	if s.Silences[0].Start != 0 {
+		return 0
+	}
 	duration := s.End.Sub(s.Start).Seconds()
 	p := float64(s.Silences[0].End) / duration
 

web/watch.go

@@ -99,7 +99,10 @@ func (r mainRoutes) WatchPage(c *gin.Context) {
 		if err != nil {
 			log.Printf("Couldn't decode user setting: %v\n", err)
 		} else if autoSkip.Enabled {
-			data.Progress.Progress = math.Max(data.Progress.Progress, tumLiveContext.Stream.FirstSilenceAsProgress())
+			// The length of the stream may mismatch with the length of the video if it is a self-stream
+			if tumLiveContext.Stream.LectureHallID != 0 {
+				data.Progress.Progress = math.Max(data.Progress.Progress, tumLiveContext.Stream.FirstSilenceAsProgress())
+			}
 		}
 	}
 	if c.Query("restart") == "1" {