fix(DASH): Live to vod transition

karma.conf.js

@@ -257,6 +257,7 @@ module.exports = (config) => {
       {pattern: 'test/test/assets/dash-multi-codec/*', included: false},
       {pattern: 'test/test/assets/dash-multi-codec-ec3/*', included: false},
       {pattern: 'test/test/assets/3675/*', included: false},
+      {pattern: 'test/test/assets/7401/*', included: false},
       {pattern: 'test/test/assets/6339/*', included: false},
       {pattern: 'test/test/assets/dash-aes-128/*', included: false},
       {pattern: 'test/test/assets/dash-clearkey/*', included: false},

lib/dash/dash_parser.js

@@ -1341,11 +1341,13 @@ shaka.dash.DashParser = class {
     for (let i = 0; i < periodNodes.length; i++) {
       const elem = periodNodes[i];
       const next = periodNodes[i + 1];
-      const start = /** @type {number} */ (
+      let start = /** @type {number} */ (
         TXml.parseAttr(elem, 'start', TXml.parseDuration, prevEnd));
       const periodId = elem.attributes['id'];
       const givenDuration =
           TXml.parseAttr(elem, 'duration', TXml.parseDuration);
+      start = (i == 0 && start == 0 && this.isTransitionFromDynamicToStatic_) ?
+          seekRangeStart : start;
 
       let periodDuration = null;
       if (next) {
@@ -1355,7 +1357,7 @@ shaka.dash.DashParser = class {
         const nextStart =
             TXml.parseAttr(next, 'start', TXml.parseDuration);
         if (nextStart != null) {
-          periodDuration = nextStart - start;
+          periodDuration = nextStart - start + seekRangeStart;
         }
       } else if (presentationDuration != null) {
         // "The Period extends until the Period.start of the next Period, or

test/player_integration.js

@@ -102,6 +102,46 @@ describe('Player', () => {
       expect(seekRange.start).toBeCloseTo(start);
     });
   });
+  describe('Live to VOD', () => {
+    it('playback transition when current time is in the past', async () => {
+      const netEngine = player.getNetworkingEngine();
+      const startTime = Date.now();
+      netEngine.registerRequestFilter((type, request) => {
+        if (type != shaka.net.NetworkingEngine.RequestType.MANIFEST) {
+          return;
+        }
+        // Simulate a live stream by providing different manifests over time.
+        const time = (Date.now() - startTime) / 1000;
+        const manifestNumber = Math.min(5, Math.floor(0.5 + time / 2));
+        request.uris = [
+          '/base/test/test/assets/7401/dash_' + manifestNumber + '.mpd',
+        ];
+        console.log('getting manifest', request.uris);
+      });
+      player.configure('streaming.bufferBehind', 1);
+      player.configure('streaming.evictionGoal', 1);
+      // Play the stream .
+      await player.load('/base/test/test/assets/7401/dash_0.mpd', 1020);
+      await video.play();
+      video.pause();
+      // Wait for the stream to be over.
+      eventManager.listen(player, 'error', Util.spyFunc(onErrorSpy));
+      /** @type {shaka.test.Waiter} */
+      const waiter = new shaka.test.Waiter(eventManager)
+          .setPlayer(player)
+          .timeoutAfter(40)
+          .failOnTimeout(true);
+      // wait for Dynamic to static
+      await waiter.waitUntilVodTransition(video);
+      expect(player.isLive()).toBe(false);
+      // set the playback to 1020 in middle of the second period
+      video.currentTime = 1020;
+      await video.play();
+      await waiter.waitForEnd(video);
+      // The stream should have transitioned to VOD by now.
+      expect(player.isLive()).toBe(false);
+    });
+  });
 
   describe('attach', () => {
     beforeEach(async () => {

test/test/assets/7401/dash_0.mpd

@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="utf-8"?>
+<MPD xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xmlns="urn:mpeg:dash:schema:mpd:2011"
+	xmlns:xlink="http://www.w3.org/1999/xlink"
+	xsi:schemaLocation="urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd"
+	profiles="urn:mpeg:dash:profile:isoff-live:2011"
+	type="dynamic"
+	minimumUpdatePeriod="PT2S"
+	suggestedPresentationDelay="PT2S"
+	availabilityStartTime="2021-10-28T07:35:57.755Z"
+	publishTime="2021-10-28T07:36:29.744Z"
+	timeShiftBufferDepth="PT42.0S"
+	maxSegmentDuration="PT2.0S"
+	minBufferTime="PT4.0S">
+	<ProgramInformation>
+	</ProgramInformation>
+	<ServiceDescription id="0">
+	</ServiceDescription>
+	<Period id="0" start="PT1000.0S" duration="PT14.0S">
+		<AdaptationSet id="0" contentType="video" startWithSAP="1" segmentAlignment="true" bitstreamSwitching="true" frameRate="30/1" maxWidth="1280" maxHeight="720" par="16:9">
+			<Representation id="0" mimeType="video/mp4" codecs="avc1.64001f" bandwidth="122012" width="1280" height="720" sar="1:1">
+				<SegmentTemplate timescale="15360" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startNumber="1">
+					<SegmentTimeline>
+						<S t="0" d="30720" r="6" />
+					</SegmentTimeline>
+				</SegmentTemplate>
+			</Representation>
+		</AdaptationSet>
+	</Period>
+	<Period id="1" start="PT1014.0S" duration="PT14.0S">
+		<AdaptationSet id="0" contentType="video" startWithSAP="1" segmentAlignment="true" bitstreamSwitching="true" frameRate="30/1" maxWidth="1280" maxHeight="720" par="16:9">
+			<Representation id="0" mimeType="video/mp4" codecs="avc1.64001f" bandwidth="122012" width="1280" height="720" sar="1:1">
+				<SegmentTemplate timescale="15360" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startNumber="1">
+					<SegmentTimeline>
+						<S t="0" d="30720" r="6" />
+					</SegmentTimeline>
+				</SegmentTemplate>
+			</Representation>
+		</AdaptationSet>
+	</Period>
+	<Period id="2" start="PT1028.0S" >
+		<AdaptationSet id="0" contentType="video" startWithSAP="1" segmentAlignment="true" bitstreamSwitching="true" frameRate="30/1" maxWidth="1280" maxHeight="720" par="16:9">
+			<Representation id="0" mimeType="video/mp4" codecs="avc1.64001f" bandwidth="122012" width="1280" height="720" sar="1:1">
+				<SegmentTemplate timescale="15360" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startNumber="1">
+					<SegmentTimeline>
+						<S t="0" d="30720" r="1" /> 
+					</SegmentTimeline>
+				</SegmentTemplate>
+			</Representation>
+		</AdaptationSet>
+	</Period>
+</MPD>

test/test/assets/7401/dash_1.mpd

@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="utf-8"?>
+<MPD xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xmlns="urn:mpeg:dash:schema:mpd:2011"
+	xmlns:xlink="http://www.w3.org/1999/xlink"
+	xsi:schemaLocation="urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd"
+	profiles="urn:mpeg:dash:profile:isoff-live:2011"
+	type="dynamic"
+	minimumUpdatePeriod="PT2S"
+	suggestedPresentationDelay="PT2S"
+	availabilityStartTime="2021-10-28T07:35:57.755Z"
+	publishTime="2021-10-28T07:36:31.750Z"
+	timeShiftBufferDepth="PT42.0S"
+	maxSegmentDuration="PT2.0S"
+	minBufferTime="PT4.0S">
+	<ProgramInformation>
+	</ProgramInformation>
+	<ServiceDescription id="0">
+	</ServiceDescription>
+	<Period id="0" start="PT1000.0S" duration="PT14.0S">
+		<AdaptationSet id="0" contentType="video" startWithSAP="1" segmentAlignment="true" bitstreamSwitching="true" frameRate="30/1" maxWidth="1280" maxHeight="720" par="16:9">
+			<Representation id="0" mimeType="video/mp4" codecs="avc1.64001f" bandwidth="122012" width="1280" height="720" sar="1:1">
+				<SegmentTemplate timescale="15360" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startNumber="1">
+					<SegmentTimeline>
+						<S t="0" d="30720" r="6" />
+					</SegmentTimeline>
+				</SegmentTemplate>
+			</Representation>
+		</AdaptationSet>
+	</Period>
+	<Period id="1" start="PT1014.0S" duration="PT14.0S">
+		<AdaptationSet id="0" contentType="video" startWithSAP="1" segmentAlignment="true" bitstreamSwitching="true" frameRate="30/1" maxWidth="1280" maxHeight="720" par="16:9">
+			<Representation id="0" mimeType="video/mp4" codecs="avc1.64001f" bandwidth="122012" width="1280" height="720" sar="1:1">
+				<SegmentTemplate timescale="15360" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startNumber="1">
+					<SegmentTimeline>
+						<S t="0" d="30720" r="6" />
+					</SegmentTimeline>
+				</SegmentTemplate>
+			</Representation>
+		</AdaptationSet>
+	</Period>
+	<Period id="2" start="PT1028.0S" >
+		<AdaptationSet id="0" contentType="video" startWithSAP="1" segmentAlignment="true" bitstreamSwitching="true" frameRate="30/1" maxWidth="1280" maxHeight="720" par="16:9">
+			<Representation id="0" mimeType="video/mp4" codecs="avc1.64001f" bandwidth="122012" width="1280" height="720" sar="1:1">
+				<SegmentTemplate timescale="15360" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startNumber="1">
+					<SegmentTimeline>
+						<S t="0" d="30720" r="2" />
+					</SegmentTimeline>
+				</SegmentTemplate>
+			</Representation>
+		</AdaptationSet>
+	</Period>
+</MPD>

test/test/assets/7401/dash_2.mpd

@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="utf-8"?>
+<MPD xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xmlns="urn:mpeg:dash:schema:mpd:2011"
+	xmlns:xlink="http://www.w3.org/1999/xlink"
+	xsi:schemaLocation="urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd"
+	profiles="urn:mpeg:dash:profile:isoff-live:2011"
+	type="static"
+	mediaPresentationDuration="PT42.0S"
+	maxSegmentDuration="PT2.0S"
+	minBufferTime="PT4.0S">
+	<ProgramInformation>
+	</ProgramInformation>
+	<ServiceDescription id="0">
+	</ServiceDescription>
+	<Period id="0" start="PT0.0S" duration="PT14.0S">
+		<AdaptationSet id="0" contentType="video" startWithSAP="1" segmentAlignment="true" bitstreamSwitching="true" frameRate="30/1" maxWidth="1280" maxHeight="720" par="16:9">
+			<Representation id="0" mimeType="video/mp4" codecs="avc1.64001f" bandwidth="122012" width="1280" height="720" sar="1:1">
+				<SegmentTemplate timescale="15360" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startNumber="1">
+					<SegmentTimeline>
+						<S t="0" d="30720" r="6" />
+					</SegmentTimeline>
+				</SegmentTemplate>
+			</Representation>
+		</AdaptationSet>
+	</Period>
+	<Period id="1" start="PT14.0S" duration="PT14.0S">
+		<AdaptationSet id="0" contentType="video" startWithSAP="1" segmentAlignment="true" bitstreamSwitching="true" frameRate="30/1" maxWidth="1280" maxHeight="720" par="16:9">
+			<Representation id="0" mimeType="video/mp4" codecs="avc1.64001f" bandwidth="122012" width="1280" height="720" sar="1:1">
+				<SegmentTemplate timescale="15360" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startNumber="1">
+					<SegmentTimeline>
+						<S t="0" d="30720" r="6" />
+					</SegmentTimeline>
+				</SegmentTemplate>
+			</Representation>
+		</AdaptationSet>
+	</Period>
+	<Period id="2" start="PT28.0S" duration="PT14.0S">
+		<AdaptationSet id="0" contentType="video" startWithSAP="1" segmentAlignment="true" bitstreamSwitching="true" frameRate="30/1" maxWidth="1280" maxHeight="720" par="16:9">
+			<Representation id="0" mimeType="video/mp4" codecs="avc1.64001f" bandwidth="122012" width="1280" height="720" sar="1:1">
+				<SegmentTemplate timescale="15360" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startNumber="1">
+					<SegmentTimeline>
+						<S t="0" d="30720" r="6" />
+					</SegmentTimeline>
+				</SegmentTemplate>
+			</Representation>
+		</AdaptationSet>
+	</Period>
+</MPD>

test/test/util/waiter.js

@@ -143,6 +143,41 @@ shaka.test.Waiter = class {
     return this.waitUntilGeneric_(goalName, p, cleanup, mediaElement);
   }
 
+  /**
+   * Wait for the video player to fetch the static manifest.
+   * Promise is resolved player.isLive is false.
+   *
+   * @param {!HTMLMediaElement} mediaElement
+   * @return {!Promise}
+  */
+  waitUntilVodTransition(mediaElement) {
+    // The name of what we're waiting for
+    const goalName = 'manifest to be static';
+
+    // The cleanup on timeout
+    let timer = null;
+    const cleanup = () => {
+      if (timer) {
+        timer.stop();
+      }
+    };
+
+    // The conditions for success
+    const p = new Promise((resolve) => {
+      const check = () => {
+        if (!this.player_.isLive()) {
+          cleanup();
+          resolve();
+        }
+      };
+
+      timer = new shaka.util.Timer(check);
+      timer.tickEvery(/* seconds= */ 1);
+    });
+
+    return this.waitUntilGeneric_(goalName, p, cleanup, mediaElement);
+  }
+
   /**
    * Wait for the video playhead to reach a certain target time.
    * If the playhead reaches |timeGoal| or the video ends before |timeout|