Optimize live start (#3283)

* Optimize live start: consider seek target according to video stream timeline * Optimize live start: consider seek target according to video stream timeline
Dash-Industry-Forum · Jun 10, 2020 · 3f0b7ef · AUGxhub · Jun 12, 2020 · 3f0b7ef
1 parent 15d87a9
commit 3f0b7ef
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Showing 2 changed files with 10 additions and 1 deletion.
diff --git a/src/streaming/StreamProcessor.js b/src/streaming/StreamProcessor.js
@@ -75,6 +75,7 @@ function StreamProcessor(config) {
     let boxParser = config.boxParser;
 
     let instance,
+        logger,
         isDynamic,
         mediaInfo,
         mediaInfoArr,
@@ -86,6 +87,7 @@ function StreamProcessor(config) {
         streamInitialized;
 
     function setup() {
+        logger = Debug(context).getInstance().getLogger(instance);
         resetInitialSettings();
 
         eventBus.on(Events.STREAM_INITIALIZED, onStreamInitialized, instance);
@@ -645,7 +647,9 @@ function StreamProcessor(config) {
 
         const currentRepresentationInfo = getRepresentationInfo();
         const liveEdge = liveEdgeFinder.getLiveEdge(currentRepresentationInfo);
-        const startTime = liveEdge - playbackController.computeLiveDelay(currentRepresentationInfo.fragmentDuration, currentRepresentationInfo.mediaInfo.streamInfo.manifestInfo.DVRWindowSize);
+        const liveDelay = playbackController.computeLiveDelay(currentRepresentationInfo.fragmentDuration, currentRepresentationInfo.mediaInfo.streamInfo.manifestInfo.DVRWindowSize);
+        const startTime = liveEdge - liveDelay;
+        logger.debug('live edge: ' + liveEdge + ', live delay: ' + liveDelay + ', live target: ' + startTime);
         const request = getFragmentRequest(currentRepresentationInfo, startTime, {
             ignoreIsFinished: true
         });

diff --git a/src/streaming/controllers/PlaybackController.js b/src/streaming/controllers/PlaybackController.js
@@ -210,6 +210,11 @@ function PlaybackController() {
     }
 
     function setLiveStartTime(value) {
+        if (liveStartTime !== streamInfo.start) {
+            // Consider only 1st live start time (set by video stream or audio if audio only)
+            return;
+        }
+        logger.info('Set live start time: ' + value);
         liveStartTime = value;
     }