Refactor the offline clip handling.

More stable, reduced function complexity.

core/transcoder/transcoder.go

@@ -35,6 +35,7 @@ type Transcoder struct {
 
 	currentStreamOutputSettings []models.StreamOutputVariant
 	currentLatencyLevel         models.LatencyLevel
+	isEvent                     bool
 
 	TranscoderCompleted func(error)
 }
@@ -153,6 +154,16 @@ func (t *Transcoder) Start() {
 	}
 }
 
+// SetLatencyLevel will set the latency level for the instance of the transcoder.
+func (t *Transcoder) SetLatencyLevel(level models.LatencyLevel) {
+	t.currentLatencyLevel = level
+}
+
+// SetIsEvent will allow you to set a stream as an "event".
+func (t *Transcoder) SetIsEvent(isEvent bool) {
+	t.isEvent = isEvent
+}
+
 func (t *Transcoder) getString() string {
 	port := t.internalListenerPort
 	localListenerAddress := "http://127.0.0.1:" + port
@@ -170,6 +181,14 @@ func (t *Transcoder) getString() string {
 		t.segmentIdentifier = shortid.MustGenerate()
 	}
 
+	hlsEventString := ""
+	if t.isEvent {
+		hlsEventString = "-hls_playlist_type event"
+	} else {
+		// Don't let the transcoder close the playlist. We do it manually.
+		hlsOptionFlags = append(hlsOptionFlags, "omit_endlist")
+	}
+
 	hlsOptionsString := ""
 	if len(hlsOptionFlags) > 0 {
 		hlsOptionsString = "-hls_flags " + strings.Join(hlsOptionFlags, "+")
@@ -191,6 +210,7 @@ func (t *Transcoder) getString() string {
 		"-hls_time", strconv.Itoa(t.currentLatencyLevel.SecondsPerSegment), // Length of each segment
 		"-hls_list_size", strconv.Itoa(t.currentLatencyLevel.SegmentCount), // Max # in variant playlist
 		hlsOptionsString,
+		hlsEventString,
 		"-segment_format_options", "mpegts_flags=mpegts_copyts=1",
 
 		// Video settings
@@ -411,11 +431,6 @@ func (t *Transcoder) SetOutputPath(output string) {
 	t.segmentOutputPath = output
 }
 
-// SetAppendToStream enables appending to the HLS stream instead of overwriting.
-func (t *Transcoder) SetAppendToStream(append bool) {
-	t.appendToStream = append
-}
-
 // SetIdentifier enables appending a unique identifier to segment file name.
 func (t *Transcoder) SetIdentifier(output string) {
 	t.segmentIdentifier = output