diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index f5353a24e1c842f38b5ebe21af58bee3f62ffb76..b2ac9f0197db6e7bf8e510ff5c43e49482939a4d 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -1,5 +1,33 @@
 # Release notes
 
+### 2.13.1 (2021-02-12)
+
+*   Live streaming:
+    *   Fix playback issue for HLS live streams without program date time
+        information ([#8560](https://github.com/google/ExoPlayer/issues/8560)).
+    *   Fix playback issue for multi-period DASH live streams
+        ([#8537](https://github.com/google/ExoPlayer/issues/8537)).
+    *   Fix playback failures when playing live streams with video tunneling
+        enabled ([#8570](https://github.com/google/ExoPlayer/issues/8570)).
+*   IMA extension:
+    *   Fix handling of repeated ad loads, to avoid ads being discarded if the
+        user seeks away and then back to a preloaded postroll (for example).
+    *   Fix a bug where an assertion would fail if the player started to buffer
+        an ad media period before the ad URI was known then an ad state update
+        arrived that didn't set the ad URI.
+    *   Add `ImaAdsLoader.focusSkipButton` to allow apps to request that the
+        skip button should receive UI focus, if shown
+        ([#8565](https://github.com/google/ExoPlayer/issues/8565)).
+*   DRM:
+    *   Re-use the previous `DrmSessionManager` instance when playing a playlist
+        (if possible)
+        ([#8523](https://github.com/google/ExoPlayer/issues/8523)).
+    *   Propagate DRM configuration when creating media sources for ad content
+        ([#8568](https://github.com/google/ExoPlayer/issues/8568)).
+    *   Only release 'keepalive' references to `DrmSession` in
+        `DefaultDrmSessionManager#release()` if keepalive is enabled
+        ([#8576](https://github.com/google/ExoPlayer/issues/8576)).
+
 ### 2.13.0 (2021-02-04)
 
 *   Core library:
diff --git a/constants.gradle b/constants.gradle
index bb775e70509b81852fe5e45e593a5400aa10664d..7b73235144d50d493acc63c7855036c6ec8c849a 100644
--- a/constants.gradle
+++ b/constants.gradle
@@ -13,8 +13,8 @@
 // limitations under the License.
 project.ext {
     // ExoPlayer version and version code.
-    releaseVersion = '2.13.0'
-    releaseVersionCode = 2013000
+    releaseVersion = '2.13.1'
+    releaseVersionCode = 2013001
     minSdkVersion = 16
     appTargetSdkVersion = 29
     targetSdkVersion = 28 // TODO: Bump once b/143232359 is resolved. Also fix TODOs in UtilTest.
diff --git a/extensions/ima/src/main/java/com/google/android/exoplayer2/ext/ima/AdTagLoader.java b/extensions/ima/src/main/java/com/google/android/exoplayer2/ext/ima/AdTagLoader.java
index 4ce0610fb67c836b903e77aaa876ab4a4dadfb7d..9908e4940cc9cbf804f8bcf8c8b8ba191e8e2b9a 100644
--- a/extensions/ima/src/main/java/com/google/android/exoplayer2/ext/ima/AdTagLoader.java
+++ b/extensions/ima/src/main/java/com/google/android/exoplayer2/ext/ima/AdTagLoader.java
@@ -281,6 +281,16 @@ import java.util.Map;
     }
   }
 
+  /**
+   * Moves UI focus to the skip button (or other interactive elements), if currently shown. See
+   * {@link AdsManager#focus()}.
+   */
+  public void focusSkipButton() {
+    if (adsManager != null) {
+      adsManager.focus();
+    }
+  }
+
   /**
    * Starts passing events from this instance (including any pending ad playback state) and
    * registers obstructions.
@@ -879,7 +889,8 @@ import java.util.Map;
     int adGroupIndex = getAdGroupIndexForAdPod(adPodInfo);
     int adIndexInAdGroup = adPodInfo.getAdPosition() - 1;
     AdInfo adInfo = new AdInfo(adGroupIndex, adIndexInAdGroup);
-    adInfoByAdMediaInfo.put(adMediaInfo, adInfo);
+    // The ad URI may already be known, so force put to update it if needed.
+    adInfoByAdMediaInfo.forcePut(adMediaInfo, adInfo);
     if (configuration.debugModeEnabled) {
       Log.d(TAG, "loadAd " + getAdMediaInfoString(adMediaInfo));
     }
diff --git a/extensions/ima/src/main/java/com/google/android/exoplayer2/ext/ima/ImaAdsLoader.java b/extensions/ima/src/main/java/com/google/android/exoplayer2/ext/ima/ImaAdsLoader.java
index e2adbaf2d020f976afc41cd9df09cc446d8e53aa..336a560042b32b04842622dce5d09e1451180176 100644
--- a/extensions/ima/src/main/java/com/google/android/exoplayer2/ext/ima/ImaAdsLoader.java
+++ b/extensions/ima/src/main/java/com/google/android/exoplayer2/ext/ima/ImaAdsLoader.java
@@ -473,6 +473,16 @@ public final class ImaAdsLoader implements Player.EventListener, AdsLoader {
     }
   }
 
+  /**
+   * Moves UI focus to the skip button (or other interactive elements), if currently shown. See
+   * {@link AdsManager#focus()}.
+   */
+  public void focusSkipButton() {
+    if (currentAdTagLoader != null) {
+      currentAdTagLoader.focusSkipButton();
+    }
+  }
+
   // AdsLoader implementation.
 
   @Override
diff --git a/library/common/src/main/java/com/google/android/exoplayer2/ExoPlayerLibraryInfo.java b/library/common/src/main/java/com/google/android/exoplayer2/ExoPlayerLibraryInfo.java
index 21f352590cc7224c00f2b903cd77276843fecc84..0315cfc9cda7dea843c52a43633babd9212a6081 100644
--- a/library/common/src/main/java/com/google/android/exoplayer2/ExoPlayerLibraryInfo.java
+++ b/library/common/src/main/java/com/google/android/exoplayer2/ExoPlayerLibraryInfo.java
@@ -30,11 +30,11 @@ public final class ExoPlayerLibraryInfo {
 
   /** The version of the library expressed as a string, for example "1.2.3". */
   // Intentionally hardcoded. Do not derive from other constants (e.g. VERSION_INT) or vice versa.
-  public static final String VERSION = "2.13.0";
+  public static final String VERSION = "2.13.1";
 
   /** The version of the library expressed as {@code "ExoPlayerLib/" + VERSION}. */
   // Intentionally hardcoded. Do not derive from other constants (e.g. VERSION) or vice versa.
-  public static final String VERSION_SLASHY = "ExoPlayerLib/2.13.0";
+  public static final String VERSION_SLASHY = "ExoPlayerLib/2.13.1";
 
   /**
    * The version of the library expressed as an integer, for example 1002003.
@@ -44,7 +44,7 @@ public final class ExoPlayerLibraryInfo {
    * integer version 123045006 (123-045-006).
    */
   // Intentionally hardcoded. Do not derive from other constants (e.g. VERSION) or vice versa.
-  public static final int VERSION_INT = 2013000;
+  public static final int VERSION_INT = 2013001;
 
   /**
    * The default user agent for requests made by the library.
diff --git a/library/common/src/main/java/com/google/android/exoplayer2/source/ads/AdPlaybackState.java b/library/common/src/main/java/com/google/android/exoplayer2/source/ads/AdPlaybackState.java
index a50fcd7d1dcef931be920faf995e5581945016bd..b70dd10c380b22cf3a9416dcd4a9167ab0d25aa9 100644
--- a/library/common/src/main/java/com/google/android/exoplayer2/source/ads/AdPlaybackState.java
+++ b/library/common/src/main/java/com/google/android/exoplayer2/source/ads/AdPlaybackState.java
@@ -182,9 +182,10 @@ public final class AdPlaybackState {
     /** Returns a new instance with the specified ad durations, in microseconds. */
     @CheckResult
     public AdGroup withAdDurationsUs(long[] durationsUs) {
-      Assertions.checkArgument(count == C.LENGTH_UNSET || durationsUs.length <= this.uris.length);
-      if (durationsUs.length < this.uris.length) {
+      if (durationsUs.length < uris.length) {
         durationsUs = copyDurationsUsWithSpaceForAdCount(durationsUs, uris.length);
+      } else if (count != C.LENGTH_UNSET && durationsUs.length > uris.length) {
+        durationsUs = Arrays.copyOf(durationsUs, uris.length);
       }
       return new AdGroup(count, states, uris, durationsUs);
     }
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/ExoPlayerImplInternal.java b/library/core/src/main/java/com/google/android/exoplayer2/ExoPlayerImplInternal.java
index 755d7511c4e631726868e58d249c64e62314d1f3..f791d05b1326e86cd3a505959604080f36234ed8 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/ExoPlayerImplInternal.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/ExoPlayerImplInternal.java
@@ -880,7 +880,7 @@ import java.util.concurrent.atomic.AtomicBoolean;
     // Adjust live playback speed to new position.
     if (playbackInfo.playWhenReady
         && playbackInfo.playbackState == Player.STATE_READY
-        && isCurrentPeriodInMovingLiveWindow()
+        && shouldUseLivePlaybackSpeedControl(playbackInfo.timeline, playbackInfo.periodId)
         && playbackInfo.playbackParameters.speed == 1f) {
       float adjustedSpeed =
           livePlaybackSpeedControl.getAdjustedPlaybackSpeed(
@@ -1051,17 +1051,14 @@ import java.util.concurrent.atomic.AtomicBoolean;
         - (periodPositionUs + period.getPositionInWindowUs());
   }
 
-  private boolean isCurrentPeriodInMovingLiveWindow() {
-    return isInMovingLiveWindow(playbackInfo.timeline, playbackInfo.periodId);
-  }
-
-  private boolean isInMovingLiveWindow(Timeline timeline, MediaPeriodId mediaPeriodId) {
+  private boolean shouldUseLivePlaybackSpeedControl(
+      Timeline timeline, MediaPeriodId mediaPeriodId) {
     if (mediaPeriodId.isAd() || timeline.isEmpty()) {
       return false;
     }
     int windowIndex = timeline.getPeriodByUid(mediaPeriodId.periodUid, period).windowIndex;
     timeline.getWindow(windowIndex, window);
-    return window.isLive() && window.isDynamic;
+    return window.isLive() && window.isDynamic && window.windowStartTimeMs != C.TIME_UNSET;
   }
 
   private void scheduleNextWork(long thisOperationStartTimeMs, long intervalMs) {
@@ -1725,7 +1722,7 @@ import java.util.concurrent.atomic.AtomicBoolean;
     }
     // Renderers are ready and we're loading. Ask the LoadControl whether to transition.
     long targetLiveOffsetUs =
-        isInMovingLiveWindow(playbackInfo.timeline, queue.getPlayingPeriod().info.id)
+        shouldUseLivePlaybackSpeedControl(playbackInfo.timeline, queue.getPlayingPeriod().info.id)
             ? livePlaybackSpeedControl.getTargetLiveOffsetUs()
             : C.TIME_UNSET;
     MediaPeriodHolder loadingHolder = queue.getLoadingPeriod();
@@ -1831,7 +1828,7 @@ import java.util.concurrent.atomic.AtomicBoolean;
       Timeline oldTimeline,
       MediaPeriodId oldPeriodId,
       long positionForTargetOffsetOverrideUs) {
-    if (newTimeline.isEmpty() || !isInMovingLiveWindow(newTimeline, newPeriodId)) {
+    if (newTimeline.isEmpty() || !shouldUseLivePlaybackSpeedControl(newTimeline, newPeriodId)) {
       // Live playback speed control is unused.
       return;
     }
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/audio/DefaultAudioSink.java b/library/core/src/main/java/com/google/android/exoplayer2/audio/DefaultAudioSink.java
index 8f16df115a45348b78add475083ca3bdc59e36e4..826839b3d2e1aaab2dba84a2969fe4e181b1a6d8 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/audio/DefaultAudioSink.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/audio/DefaultAudioSink.java
@@ -488,7 +488,6 @@ public final class DefaultAudioSink implements AudioSink {
       throws ConfigurationException {
     int inputPcmFrameSize;
     @Nullable AudioProcessor[] availableAudioProcessors;
-    boolean canApplyPlaybackParameters;
 
     @OutputMode int outputMode;
     @C.Encoding int outputEncoding;
@@ -500,11 +499,10 @@ public final class DefaultAudioSink implements AudioSink {
       Assertions.checkArgument(Util.isEncodingLinearPcm(inputFormat.pcmEncoding));
 
       inputPcmFrameSize = Util.getPcmFrameSize(inputFormat.pcmEncoding, inputFormat.channelCount);
-      boolean useFloatOutput =
-          enableFloatOutput && Util.isEncodingHighResolutionPcm(inputFormat.pcmEncoding);
       availableAudioProcessors =
-          useFloatOutput ? toFloatPcmAvailableAudioProcessors : toIntPcmAvailableAudioProcessors;
-      canApplyPlaybackParameters = !useFloatOutput;
+          shouldUseFloatOutput(inputFormat.pcmEncoding)
+              ? toFloatPcmAvailableAudioProcessors
+              : toIntPcmAvailableAudioProcessors;
 
       trimmingAudioProcessor.setTrimFrameCount(
           inputFormat.encoderDelay, inputFormat.encoderPadding);
@@ -541,7 +539,6 @@ public final class DefaultAudioSink implements AudioSink {
     } else {
       inputPcmFrameSize = C.LENGTH_UNSET;
       availableAudioProcessors = new AudioProcessor[0];
-      canApplyPlaybackParameters = false;
       outputSampleRate = inputFormat.sampleRate;
       outputPcmFrameSize = C.LENGTH_UNSET;
       if (enableOffload && isOffloadedPlaybackSupported(inputFormat, audioAttributes)) {
@@ -586,7 +583,6 @@ public final class DefaultAudioSink implements AudioSink {
             outputEncoding,
             specifiedBufferSize,
             enableAudioTrackPlaybackParams,
-            canApplyPlaybackParameters,
             availableAudioProcessors);
     if (isAudioTrackInitialized()) {
       this.pendingConfiguration = pendingConfiguration;
@@ -1336,11 +1332,11 @@ public final class DefaultAudioSink implements AudioSink {
 
   private void applyAudioProcessorPlaybackParametersAndSkipSilence(long presentationTimeUs) {
     PlaybackParameters playbackParameters =
-        configuration.canApplyPlaybackParameters
+        shouldApplyAudioProcessorPlaybackParameters()
             ? audioProcessorChain.applyPlaybackParameters(getAudioProcessorPlaybackParameters())
             : PlaybackParameters.DEFAULT;
     boolean skipSilenceEnabled =
-        configuration.canApplyPlaybackParameters
+        shouldApplyAudioProcessorPlaybackParameters()
             ? audioProcessorChain.applySkipSilenceEnabled(getSkipSilenceEnabled())
             : DEFAULT_SKIP_SILENCE;
     mediaPositionParametersCheckpoints.add(
@@ -1355,6 +1351,31 @@ public final class DefaultAudioSink implements AudioSink {
     }
   }
 
+  /**
+   * Returns whether audio processor playback parameters should be applied in the current
+   * configuration.
+   */
+  private boolean shouldApplyAudioProcessorPlaybackParameters() {
+    // We don't apply speed/pitch adjustment using an audio processor in the following cases:
+    // - in tunneling mode, because audio processing can change the duration of audio yet the video
+    //   frame presentation times are currently not modified (see also
+    //   https://github.com/google/ExoPlayer/issues/4803);
+    // - when playing encoded audio via passthrough/offload, because modifying the audio stream
+    //   would require decoding/re-encoding; and
+    // - when outputting float PCM audio, because SonicAudioProcessor outputs 16-bit integer PCM.
+    return !tunneling
+        && MimeTypes.AUDIO_RAW.equals(configuration.inputFormat.sampleMimeType)
+        && !shouldUseFloatOutput(configuration.inputFormat.pcmEncoding);
+  }
+
+  /**
+   * Returns whether audio in the specified PCM encoding should be written to the audio track as
+   * float PCM.
+   */
+  private boolean shouldUseFloatOutput(@C.PcmEncoding int pcmEncoding) {
+    return enableFloatOutput && Util.isEncodingHighResolutionPcm(pcmEncoding);
+  }
+
   /**
    * Applies and updates media position parameters.
    *
@@ -1897,7 +1918,6 @@ public final class DefaultAudioSink implements AudioSink {
     public final int outputChannelConfig;
     @C.Encoding public final int outputEncoding;
     public final int bufferSize;
-    public final boolean canApplyPlaybackParameters;
     public final AudioProcessor[] availableAudioProcessors;
 
     public Configuration(
@@ -1910,7 +1930,6 @@ public final class DefaultAudioSink implements AudioSink {
         int outputEncoding,
         int specifiedBufferSize,
         boolean enableAudioTrackPlaybackParams,
-        boolean canApplyPlaybackParameters,
         AudioProcessor[] availableAudioProcessors) {
       this.inputFormat = inputFormat;
       this.inputPcmFrameSize = inputPcmFrameSize;
@@ -1919,7 +1938,6 @@ public final class DefaultAudioSink implements AudioSink {
       this.outputSampleRate = outputSampleRate;
       this.outputChannelConfig = outputChannelConfig;
       this.outputEncoding = outputEncoding;
-      this.canApplyPlaybackParameters = canApplyPlaybackParameters;
       this.availableAudioProcessors = availableAudioProcessors;
 
       // Call computeBufferSize() last as it depends on the other configuration values.
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/drm/DefaultDrmSessionManager.java b/library/core/src/main/java/com/google/android/exoplayer2/drm/DefaultDrmSessionManager.java
index 67cb095b8d92bfff8060aac75fc36243f7c70358..d24d5ce847fc6e51dfef03167ec52b8a8ab15948 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/drm/DefaultDrmSessionManager.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/drm/DefaultDrmSessionManager.java
@@ -457,12 +457,14 @@ public class DefaultDrmSessionManager implements DrmSessionManager {
     if (--prepareCallsCount != 0) {
       return;
     }
-    // Make a local copy, because sessions are removed from this.sessions during release (via
-    // callback).
-    List<DefaultDrmSession> sessions = new ArrayList<>(this.sessions);
-    for (int i = 0; i < sessions.size(); i++) {
-      // Release all the keepalive acquisitions.
-      sessions.get(i).release(/* eventDispatcher= */ null);
+    // Release all keepalive acquisitions if keepalive is enabled.
+    if (sessionKeepaliveMs != C.TIME_UNSET) {
+      // Make a local copy, because sessions are removed from this.sessions during release (via
+      // callback).
+      List<DefaultDrmSession> sessions = new ArrayList<>(this.sessions);
+      for (int i = 0; i < sessions.size(); i++) {
+        sessions.get(i).release(/* eventDispatcher= */ null);
+      }
     }
     Assertions.checkNotNull(exoMediaDrm).release();
     exoMediaDrm = null;
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/drm/DefaultDrmSessionManagerProvider.java b/library/core/src/main/java/com/google/android/exoplayer2/drm/DefaultDrmSessionManagerProvider.java
index 10bd2953d5c625569bef07967ae2c11e62785e65..d8a16fc077d730627cdf865c630c41993e62dc04 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/drm/DefaultDrmSessionManagerProvider.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/drm/DefaultDrmSessionManagerProvider.java
@@ -16,23 +16,38 @@
 package com.google.android.exoplayer2.drm;
 
 import static com.google.android.exoplayer2.drm.DefaultDrmSessionManager.MODE_PLAYBACK;
+import static com.google.android.exoplayer2.util.Assertions.checkNotNull;
 
+import androidx.annotation.GuardedBy;
 import androidx.annotation.Nullable;
+import androidx.annotation.RequiresApi;
 import com.google.android.exoplayer2.MediaItem;
 import com.google.android.exoplayer2.upstream.DefaultHttpDataSource;
 import com.google.android.exoplayer2.upstream.DefaultHttpDataSourceFactory;
 import com.google.android.exoplayer2.upstream.HttpDataSource;
-import com.google.android.exoplayer2.util.Assertions;
 import com.google.android.exoplayer2.util.Util;
 import com.google.common.primitives.Ints;
 import java.util.Map;
+import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
 
 /** Default implementation of {@link DrmSessionManagerProvider}. */
 public final class DefaultDrmSessionManagerProvider implements DrmSessionManagerProvider {
 
+  private final Object lock;
+
+  @GuardedBy("lock")
+  private MediaItem.@MonotonicNonNull DrmConfiguration drmConfiguration;
+
+  @GuardedBy("lock")
+  private @MonotonicNonNull DrmSessionManager manager;
+
   @Nullable private HttpDataSource.Factory drmHttpDataSourceFactory;
   @Nullable private String userAgent;
 
+  public DefaultDrmSessionManagerProvider() {
+    lock = new Object();
+  }
+
   /**
    * Sets the {@link HttpDataSource.Factory} to be used for creating {@link HttpMediaDrmCallback
    * HttpMediaDrmCallbacks} which executes key and provisioning requests over HTTP. If {@code null}
@@ -60,12 +75,24 @@ public final class DefaultDrmSessionManagerProvider implements DrmSessionManager
 
   @Override
   public DrmSessionManager get(MediaItem mediaItem) {
-    Assertions.checkNotNull(mediaItem.playbackProperties);
+    checkNotNull(mediaItem.playbackProperties);
     @Nullable
     MediaItem.DrmConfiguration drmConfiguration = mediaItem.playbackProperties.drmConfiguration;
     if (drmConfiguration == null || Util.SDK_INT < 18) {
       return DrmSessionManager.DRM_UNSUPPORTED;
     }
+
+    synchronized (lock) {
+      if (!Util.areEqual(drmConfiguration, this.drmConfiguration)) {
+        this.drmConfiguration = drmConfiguration;
+        this.manager = createManager(drmConfiguration);
+      }
+      return checkNotNull(this.manager);
+    }
+  }
+
+  @RequiresApi(18)
+  private DrmSessionManager createManager(MediaItem.DrmConfiguration drmConfiguration) {
     HttpDataSource.Factory dataSourceFactory =
         drmHttpDataSourceFactory != null
             ? drmHttpDataSourceFactory
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/source/ads/AdsMediaSource.java b/library/core/src/main/java/com/google/android/exoplayer2/source/ads/AdsMediaSource.java
index 4f2617e868792c59d96cee41aa799cb3b4766aa2..be1ab81cd394c739c5204b8b5f321c75066b6002 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/source/ads/AdsMediaSource.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/source/ads/AdsMediaSource.java
@@ -318,8 +318,28 @@ public final class AdsMediaSource extends CompositeMediaSource<MediaPeriodId> {
             && adIndexInAdGroup < adPlaybackState.adGroups[adGroupIndex].uris.length) {
           @Nullable Uri adUri = adPlaybackState.adGroups[adGroupIndex].uris[adIndexInAdGroup];
           if (adUri != null) {
-            MediaSource adMediaSource =
-                adMediaSourceFactory.createMediaSource(MediaItem.fromUri(adUri));
+            MediaItem.Builder adMediaItem = new MediaItem.Builder().setUri(adUri);
+            // Propagate the content's DRM config into the ad media source.
+            @Nullable
+            MediaItem.PlaybackProperties contentPlaybackProperties =
+                contentMediaSource.getMediaItem().playbackProperties;
+            if (contentPlaybackProperties != null
+                && contentPlaybackProperties.drmConfiguration != null) {
+              MediaItem.DrmConfiguration drmConfiguration =
+                  contentPlaybackProperties.drmConfiguration;
+              // TODO(internal b/179984779): Use MediaItem.Builder#setDrmConfiguration() when it's
+              // available.
+              adMediaItem.setDrmUuid(drmConfiguration.uuid);
+              adMediaItem.setDrmKeySetId(drmConfiguration.getKeySetId());
+              adMediaItem.setDrmLicenseUri(drmConfiguration.licenseUri);
+              adMediaItem.setDrmForceDefaultLicenseUri(drmConfiguration.forceDefaultLicenseUri);
+              adMediaItem.setDrmLicenseRequestHeaders(drmConfiguration.requestHeaders);
+              adMediaItem.setDrmMultiSession(drmConfiguration.multiSession);
+              adMediaItem.setDrmPlayClearContentWithoutKey(
+                  drmConfiguration.playClearContentWithoutKey);
+              adMediaItem.setDrmSessionForClearTypes(drmConfiguration.sessionForClearTypes);
+            }
+            MediaSource adMediaSource = adMediaSourceFactory.createMediaSource(adMediaItem.build());
             adMediaSourceHolder.initializeWithMediaSource(adMediaSource, adUri);
           }
         }
diff --git a/library/core/src/test/java/com/google/android/exoplayer2/ExoPlayerTest.java b/library/core/src/test/java/com/google/android/exoplayer2/ExoPlayerTest.java
index 008d8c6b537474bb54d2c70a64e1d92be5c544d9..e743858875a2a1f994b911e353745a00f015a2c7 100644
--- a/library/core/src/test/java/com/google/android/exoplayer2/ExoPlayerTest.java
+++ b/library/core/src/test/java/com/google/android/exoplayer2/ExoPlayerTest.java
@@ -71,6 +71,7 @@ import com.google.android.exoplayer2.source.MediaSource;
 import com.google.android.exoplayer2.source.MediaSource.MediaPeriodId;
 import com.google.android.exoplayer2.source.MediaSourceEventListener;
 import com.google.android.exoplayer2.source.SilenceMediaSource;
+import com.google.android.exoplayer2.source.SinglePeriodTimeline;
 import com.google.android.exoplayer2.source.TrackGroup;
 import com.google.android.exoplayer2.source.TrackGroupArray;
 import com.google.android.exoplayer2.source.ads.AdPlaybackState;
@@ -83,6 +84,7 @@ import com.google.android.exoplayer2.testutil.ExoPlayerTestRunner;
 import com.google.android.exoplayer2.testutil.FakeAdaptiveDataSet;
 import com.google.android.exoplayer2.testutil.FakeAdaptiveMediaSource;
 import com.google.android.exoplayer2.testutil.FakeChunkSource;
+import com.google.android.exoplayer2.testutil.FakeClock;
 import com.google.android.exoplayer2.testutil.FakeDataSource;
 import com.google.android.exoplayer2.testutil.FakeMediaClockRenderer;
 import com.google.android.exoplayer2.testutil.FakeMediaPeriod;
@@ -8833,6 +8835,42 @@ public final class ExoPlayerTest {
     assertThat(liveOffsetAtEnd).isIn(Range.closed(1_900L, 2_100L));
   }
 
+  @Test
+  public void targetLiveOffsetInMedia_unknownWindowStartTime_doesNotAdjustLiveOffset()
+      throws Exception {
+    FakeClock fakeClock = new AutoAdvancingFakeClock(/* initialTimeMs= */ 987_654_321L);
+    ExoPlayer player = new TestExoPlayerBuilder(context).setClock(fakeClock).build();
+    MediaItem mediaItem =
+        new MediaItem.Builder().setUri(Uri.EMPTY).setLiveTargetOffsetMs(4_000).build();
+    Timeline liveTimeline =
+        new SinglePeriodTimeline(
+            /* presentationStartTimeMs= */ C.TIME_UNSET,
+            /* windowStartTimeMs= */ C.TIME_UNSET,
+            /* elapsedRealtimeEpochOffsetMs= */ C.TIME_UNSET,
+            /* periodDurationUs= */ 1000 * C.MICROS_PER_SECOND,
+            /* windowDurationUs= */ 1000 * C.MICROS_PER_SECOND,
+            /* windowPositionInPeriodUs= */ 0,
+            /* windowDefaultStartPositionUs= */ 0,
+            /* isSeekable= */ true,
+            /* isDynamic= */ true,
+            /* manifest= */ null,
+            mediaItem,
+            mediaItem.liveConfiguration);
+    player.pause();
+    player.setMediaSource(new FakeMediaSource(liveTimeline));
+    player.prepare();
+    TestPlayerRunHelper.runUntilPlaybackState(player, Player.STATE_READY);
+
+    long playbackStartTimeMs = fakeClock.elapsedRealtime();
+    TestPlayerRunHelper.playUntilPosition(player, /* windowIndex= */ 0, /* positionMs= */ 999_000);
+    long playbackEndTimeMs = fakeClock.elapsedRealtime();
+    player.release();
+
+    // Assert that the time it took to play 999 seconds of media is 999 seconds (asserting that no
+    // playback speed adjustment was used).
+    assertThat(playbackEndTimeMs - playbackStartTimeMs).isEqualTo(999_000);
+  }
+
   @Test
   public void noTargetLiveOffsetInMedia_doesNotAdjustLiveOffset() throws Exception {
     long windowStartUnixTimeMs = 987_654_321_000L;
diff --git a/library/core/src/test/java/com/google/android/exoplayer2/audio/DefaultAudioSinkTest.java b/library/core/src/test/java/com/google/android/exoplayer2/audio/DefaultAudioSinkTest.java
index 7b9e639cd642b0c3279a48cd367ae1c3e75b65f7..13c62c96b9d6f7fa445f7742a2eee5122c208d81 100644
--- a/library/core/src/test/java/com/google/android/exoplayer2/audio/DefaultAudioSinkTest.java
+++ b/library/core/src/test/java/com/google/android/exoplayer2/audio/DefaultAudioSinkTest.java
@@ -320,6 +320,20 @@ public final class DefaultAudioSinkTest {
     assertThat(thrown.format).isEqualTo(format);
   }
 
+  @Test
+  public void setPlaybackParameters_doesNothingWhenTunnelingIsEnabled() throws Exception {
+    defaultAudioSink.setAudioSessionId(1);
+    defaultAudioSink.enableTunnelingV21();
+    defaultAudioSink.setPlaybackParameters(new PlaybackParameters(2));
+    configureDefaultAudioSink(/* channelCount= */ 2);
+    defaultAudioSink.handleBuffer(
+        createDefaultSilenceBuffer(),
+        /* presentationTimeUs= */ 5 * C.MICROS_PER_SECOND,
+        /* encodedAccessUnitCount= */ 1);
+
+    assertThat(defaultAudioSink.getPlaybackParameters().speed).isEqualTo(1);
+  }
+
   private void configureDefaultAudioSink(int channelCount) throws AudioSink.ConfigurationException {
     configureDefaultAudioSink(channelCount, /* trimStartFrames= */ 0, /* trimEndFrames= */ 0);
   }
diff --git a/library/core/src/test/java/com/google/android/exoplayer2/drm/DefaultDrmSessionManagerTest.java b/library/core/src/test/java/com/google/android/exoplayer2/drm/DefaultDrmSessionManagerTest.java
index 5ac26a76b3116197b633349837d9e33c9a411393..c0b83e7a656c7e0335015538c8e9aa048d4d86c8 100644
--- a/library/core/src/test/java/com/google/android/exoplayer2/drm/DefaultDrmSessionManagerTest.java
+++ b/library/core/src/test/java/com/google/android/exoplayer2/drm/DefaultDrmSessionManagerTest.java
@@ -147,6 +147,32 @@ public class DefaultDrmSessionManagerTest {
     assertThat(drmSession.getState()).isEqualTo(DrmSession.STATE_RELEASED);
   }
 
+  @Test(timeout = 10_000)
+  public void managerRelease_keepaliveDisabled_doesntReleaseAnySessions() throws Exception {
+    FakeExoMediaDrm.LicenseServer licenseServer =
+        FakeExoMediaDrm.LicenseServer.allowingSchemeDatas(DRM_SCHEME_DATAS);
+    DrmSessionManager drmSessionManager =
+        new DefaultDrmSessionManager.Builder()
+            .setUuidAndExoMediaDrmProvider(DRM_SCHEME_UUID, uuid -> new FakeExoMediaDrm())
+            .setSessionKeepaliveMs(C.TIME_UNSET)
+            .build(/* mediaDrmCallback= */ licenseServer);
+
+    drmSessionManager.prepare();
+    DrmSession drmSession =
+        checkNotNull(
+            drmSessionManager.acquireSession(
+                /* playbackLooper= */ checkNotNull(Looper.myLooper()),
+                /* eventDispatcher= */ null,
+                FORMAT_WITH_DRM_INIT_DATA));
+    waitForOpenedWithKeys(drmSession);
+    assertThat(drmSession.getState()).isEqualTo(DrmSession.STATE_OPENED_WITH_KEYS);
+
+    // Release the manager, the session should still be open (though it's unusable because
+    // the underlying ExoMediaDrm is released).
+    drmSessionManager.release();
+    assertThat(drmSession.getState()).isEqualTo(DrmSession.STATE_OPENED_WITH_KEYS);
+  }
+
   @Test(timeout = 10_000)
   public void maxConcurrentSessionsExceeded_allKeepAliveSessionsEagerlyReleased() throws Exception {
     ImmutableList<DrmInitData.SchemeData> secondSchemeDatas =
diff --git a/library/core/src/test/java/com/google/android/exoplayer2/source/DefaultDrmSessionManagerProviderTest.java b/library/core/src/test/java/com/google/android/exoplayer2/source/DefaultDrmSessionManagerProviderTest.java
index 4e597b6371710f5496d75a0fbbd12bd09706c7da..0c830ca5abfbacdb8be36740d1813e0602bbbb7e 100644
--- a/library/core/src/test/java/com/google/android/exoplayer2/source/DefaultDrmSessionManagerProviderTest.java
+++ b/library/core/src/test/java/com/google/android/exoplayer2/source/DefaultDrmSessionManagerProviderTest.java
@@ -51,4 +51,39 @@ public class DefaultDrmSessionManagerProviderTest {
 
     assertThat(drmSessionManager).isNotEqualTo(DrmSessionManager.DRM_UNSUPPORTED);
   }
+
+  @Test
+  public void create_reusesCachedInstanceWherePossible() {
+    MediaItem mediaItem1 =
+        new MediaItem.Builder()
+            .setUri("https://example.test/content-1")
+            .setDrmUuid(C.WIDEVINE_UUID)
+            .build();
+    // Same DRM info as item1, but different URL to check it doesn't prevent re-using a manager.
+    MediaItem mediaItem2 =
+        new MediaItem.Builder()
+            .setUri("https://example.test/content-2")
+            .setDrmUuid(C.WIDEVINE_UUID)
+            .build();
+    // Different DRM info to 1 and 2, needs a different manager instance.
+    MediaItem mediaItem3 =
+        new MediaItem.Builder()
+            .setUri("https://example.test/content-3")
+            .setDrmUuid(C.WIDEVINE_UUID)
+            .setDrmLicenseUri("https://example.test/license")
+            .build();
+
+    DefaultDrmSessionManagerProvider provider = new DefaultDrmSessionManagerProvider();
+    DrmSessionManager drmSessionManager1 = provider.get(mediaItem1);
+    DrmSessionManager drmSessionManager2 = provider.get(mediaItem2);
+    DrmSessionManager drmSessionManager3 = provider.get(mediaItem3);
+
+    // Get a manager for the first item again - expect it to be a different instance to last time
+    // since we only cache one.
+    DrmSessionManager drmSessionManager4 = provider.get(mediaItem1);
+
+    assertThat(drmSessionManager1).isSameInstanceAs(drmSessionManager2);
+    assertThat(drmSessionManager1).isNotSameInstanceAs(drmSessionManager3);
+    assertThat(drmSessionManager1).isNotSameInstanceAs(drmSessionManager4);
+  }
 }
diff --git a/library/dash/src/main/java/com/google/android/exoplayer2/source/dash/DashMediaSource.java b/library/dash/src/main/java/com/google/android/exoplayer2/source/dash/DashMediaSource.java
index 258ebf327045eccb07a91e56be03ce983e3eac33..d63295adde20ddec467176c7bfcf630d02137137 100644
--- a/library/dash/src/main/java/com/google/android/exoplayer2/source/dash/DashMediaSource.java
+++ b/library/dash/src/main/java/com/google/android/exoplayer2/source/dash/DashMediaSource.java
@@ -901,77 +901,54 @@ public final class DashMediaSource extends BaseMediaSource {
       }
     }
     // Update the window.
-    boolean windowChangingImplicitly = false;
+    Period firstPeriod = manifest.getPeriod(0);
     int lastPeriodIndex = manifest.getPeriodCount() - 1;
     Period lastPeriod = manifest.getPeriod(lastPeriodIndex);
     long lastPeriodDurationUs = manifest.getPeriodDurationUs(lastPeriodIndex);
     long nowUnixTimeUs = C.msToUs(Util.getNowUnixTimeMs(elapsedRealtimeOffsetMs));
-    // Get the period-relative start/end times.
-    long currentStartTimeUs =
-        getAvailableStartTimeUs(
-            manifest.getPeriod(0), manifest.getPeriodDurationUs(0), nowUnixTimeUs);
-    long currentEndTimeUs = getAvailableEndTimeUs(lastPeriod, lastPeriodDurationUs, nowUnixTimeUs);
-    if (manifest.dynamic && !isIndexExplicit(lastPeriod)) {
-      // The manifest describes an incomplete live stream. Update the start/end times to reflect the
-      // live stream duration and the manifest's time shift buffer depth.
-      long liveStreamEndPositionInLastPeriodUs = currentEndTimeUs - C.msToUs(lastPeriod.startMs);
-      currentEndTimeUs = min(liveStreamEndPositionInLastPeriodUs, currentEndTimeUs);
-      if (manifest.timeShiftBufferDepthMs != C.TIME_UNSET) {
-        long timeShiftBufferDepthUs = C.msToUs(manifest.timeShiftBufferDepthMs);
-        long offsetInPeriodUs = currentEndTimeUs - timeShiftBufferDepthUs;
-        int periodIndex = lastPeriodIndex;
-        while (offsetInPeriodUs < 0 && periodIndex > 0) {
-          offsetInPeriodUs += manifest.getPeriodDurationUs(--periodIndex);
-        }
-        if (periodIndex == 0) {
-          currentStartTimeUs = max(currentStartTimeUs, offsetInPeriodUs);
-        } else {
-          // The time shift buffer starts after the earliest period.
-          // TODO: Does this ever happen?
-          currentStartTimeUs = manifest.getPeriodDurationUs(0);
-        }
-      }
-      windowChangingImplicitly = true;
-    }
-    long windowDurationUs = currentEndTimeUs - currentStartTimeUs;
-    for (int i = 0; i < manifest.getPeriodCount() - 1; i++) {
-      windowDurationUs += manifest.getPeriodDurationUs(i);
-    }
-
-    long windowStartTimeMs = C.TIME_UNSET;
-    if (manifest.availabilityStartTimeMs != C.TIME_UNSET) {
-      windowStartTimeMs =
-          manifest.availabilityStartTimeMs
-              + manifest.getPeriod(0).startMs
-              + C.usToMs(currentStartTimeUs);
-    }
-
-    long windowDefaultStartPositionUs = 0;
+    long windowStartTimeInManifestUs =
+        getAvailableStartTimeInManifestUs(
+            firstPeriod, manifest.getPeriodDurationUs(0), nowUnixTimeUs);
+    long windowEndTimeInManifestUs =
+        getAvailableEndTimeInManifestUs(lastPeriod, lastPeriodDurationUs, nowUnixTimeUs);
+    boolean windowChangingImplicitly = manifest.dynamic && !isIndexExplicit(lastPeriod);
+    if (windowChangingImplicitly && manifest.timeShiftBufferDepthMs != C.TIME_UNSET) {
+      // Update the available start time to reflect the manifest's time shift buffer depth.
+      long timeShiftBufferStartTimeInManifestUs =
+          windowEndTimeInManifestUs - C.msToUs(manifest.timeShiftBufferDepthMs);
+      windowStartTimeInManifestUs =
+          max(windowStartTimeInManifestUs, timeShiftBufferStartTimeInManifestUs);
+    }
+    long windowDurationUs = windowEndTimeInManifestUs - windowStartTimeInManifestUs;
+    long windowStartUnixTimeMs = C.TIME_UNSET;
+    long windowDefaultPositionUs = 0;
     if (manifest.dynamic) {
-      updateMediaItemLiveConfiguration(
-          /* nowPeriodTimeUs= */ currentStartTimeUs + nowUnixTimeUs - C.msToUs(windowStartTimeMs),
-          /* windowStartPeriodTimeUs= */ currentStartTimeUs,
-          /* windowEndPeriodTimeUs= */ currentEndTimeUs);
-      windowDefaultStartPositionUs =
-          nowUnixTimeUs - C.msToUs(windowStartTimeMs + liveConfiguration.targetOffsetMs);
-      long minimumDefaultStartPositionUs =
+      checkState(manifest.availabilityStartTimeMs != C.TIME_UNSET);
+      long nowInWindowUs =
+          nowUnixTimeUs - C.msToUs(manifest.availabilityStartTimeMs) - windowStartTimeInManifestUs;
+      updateMediaItemLiveConfiguration(nowInWindowUs, windowDurationUs);
+      windowStartUnixTimeMs =
+          manifest.availabilityStartTimeMs + C.usToMs(windowStartTimeInManifestUs);
+      windowDefaultPositionUs = nowInWindowUs - C.msToUs(liveConfiguration.targetOffsetMs);
+      long minimumWindowDefaultPositionUs =
           min(MIN_LIVE_DEFAULT_START_POSITION_US, windowDurationUs / 2);
-      if (windowDefaultStartPositionUs < minimumDefaultStartPositionUs) {
-        // The default start position is too close to the start of the live window. Set it to the
-        // minimum default start position provided the window is at least twice as big. Else set
-        // it to the middle of the window.
-        windowDefaultStartPositionUs = minimumDefaultStartPositionUs;
+      if (windowDefaultPositionUs < minimumWindowDefaultPositionUs) {
+        // The default position is too close to the start of the live window. Set it to the minimum
+        // default position provided the window is at least twice as big. Else set it to the middle
+        // of the window.
+        windowDefaultPositionUs = minimumWindowDefaultPositionUs;
       }
     }
+    long offsetInFirstPeriodUs = windowStartTimeInManifestUs - C.msToUs(firstPeriod.startMs);
     DashTimeline timeline =
         new DashTimeline(
             manifest.availabilityStartTimeMs,
-            windowStartTimeMs,
+            windowStartUnixTimeMs,
             elapsedRealtimeOffsetMs,
             firstPeriodId,
-            /* offsetInFirstPeriodUs= */ currentStartTimeUs,
+            offsetInFirstPeriodUs,
             windowDurationUs,
-            windowDefaultStartPositionUs,
+            windowDefaultPositionUs,
             manifest,
             mediaItem,
             manifest.dynamic ? liveConfiguration : null);
@@ -1008,8 +985,7 @@ public final class DashMediaSource extends BaseMediaSource {
     }
   }
 
-  private void updateMediaItemLiveConfiguration(
-      long nowPeriodTimeUs, long windowStartPeriodTimeUs, long windowEndPeriodTimeUs) {
+  private void updateMediaItemLiveConfiguration(long nowInWindowUs, long windowDurationUs) {
     long maxLiveOffsetMs;
     if (mediaItem.liveConfiguration.maxOffsetMs != C.TIME_UNSET) {
       maxLiveOffsetMs = mediaItem.liveConfiguration.maxOffsetMs;
@@ -1017,7 +993,7 @@ public final class DashMediaSource extends BaseMediaSource {
         && manifest.serviceDescription.maxOffsetMs != C.TIME_UNSET) {
       maxLiveOffsetMs = manifest.serviceDescription.maxOffsetMs;
     } else {
-      maxLiveOffsetMs = C.usToMs(nowPeriodTimeUs - windowStartPeriodTimeUs);
+      maxLiveOffsetMs = C.usToMs(nowInWindowUs);
     }
     long minLiveOffsetMs;
     if (mediaItem.liveConfiguration.minOffsetMs != C.TIME_UNSET) {
@@ -1026,7 +1002,7 @@ public final class DashMediaSource extends BaseMediaSource {
         && manifest.serviceDescription.minOffsetMs != C.TIME_UNSET) {
       minLiveOffsetMs = manifest.serviceDescription.minOffsetMs;
     } else {
-      minLiveOffsetMs = C.usToMs(nowPeriodTimeUs - windowEndPeriodTimeUs);
+      minLiveOffsetMs = C.usToMs(nowInWindowUs - windowDurationUs);
       if (minLiveOffsetMs < 0 && maxLiveOffsetMs > 0) {
         // The current time is in the window, so assume all clocks are synchronized and set the
         // minimum to a live offset of zero.
@@ -1052,12 +1028,10 @@ public final class DashMediaSource extends BaseMediaSource {
       targetOffsetMs = minLiveOffsetMs;
     }
     if (targetOffsetMs > maxLiveOffsetMs) {
-      long windowDurationUs = windowEndPeriodTimeUs - windowStartPeriodTimeUs;
-      long liveOffsetAtWindowStartUs = nowPeriodTimeUs - windowStartPeriodTimeUs;
       long safeDistanceFromWindowStartUs =
           min(MIN_LIVE_DEFAULT_START_POSITION_US, windowDurationUs / 2);
       long maxTargetOffsetForSafeDistanceToWindowStartMs =
-          C.usToMs(liveOffsetAtWindowStartUs - safeDistanceFromWindowStartUs);
+          C.usToMs(nowInWindowUs - safeDistanceFromWindowStartUs);
       targetOffsetMs =
           Util.constrainValue(
               maxTargetOffsetForSafeDistanceToWindowStartMs, minLiveOffsetMs, maxLiveOffsetMs);
@@ -1147,9 +1121,10 @@ public final class DashMediaSource extends BaseMediaSource {
     return LongMath.divide(intervalUs, 1000, RoundingMode.CEILING);
   }
 
-  private static long getAvailableStartTimeUs(
+  private static long getAvailableStartTimeInManifestUs(
       Period period, long periodDurationUs, long nowUnixTimeUs) {
-    long availableStartTimeUs = 0;
+    long periodStartTimeInManifestUs = C.msToUs(period.startMs);
+    long availableStartTimeInManifestUs = periodStartTimeInManifestUs;
     boolean haveAudioVideoAdaptationSets = hasVideoOrAudioAdaptationSets(period);
     for (int i = 0; i < period.adaptationSets.size(); i++) {
       AdaptationSet adaptationSet = period.adaptationSets.get(i);
@@ -1162,23 +1137,26 @@ public final class DashMediaSource extends BaseMediaSource {
       }
       @Nullable DashSegmentIndex index = representations.get(0).getIndex();
       if (index == null) {
-        return 0;
+        return periodStartTimeInManifestUs;
       }
       int availableSegmentCount = index.getAvailableSegmentCount(periodDurationUs, nowUnixTimeUs);
       if (availableSegmentCount == 0) {
-        return 0;
+        return periodStartTimeInManifestUs;
       }
       long firstAvailableSegmentNum =
           index.getFirstAvailableSegmentNum(periodDurationUs, nowUnixTimeUs);
-      long adaptationSetAvailableStartTimeUs = index.getTimeUs(firstAvailableSegmentNum);
-      availableStartTimeUs = max(availableStartTimeUs, adaptationSetAvailableStartTimeUs);
+      long adaptationSetAvailableStartTimeInManifestUs =
+          periodStartTimeInManifestUs + index.getTimeUs(firstAvailableSegmentNum);
+      availableStartTimeInManifestUs =
+          max(availableStartTimeInManifestUs, adaptationSetAvailableStartTimeInManifestUs);
     }
-    return availableStartTimeUs;
+    return availableStartTimeInManifestUs;
   }
 
-  private static long getAvailableEndTimeUs(
+  private static long getAvailableEndTimeInManifestUs(
       Period period, long periodDurationUs, long nowUnixTimeUs) {
-    long availableEndTimeUs = Long.MAX_VALUE;
+    long periodStartTimeInManifestUs = C.msToUs(period.startMs);
+    long availableEndTimeInManifestUs = Long.MAX_VALUE;
     boolean haveAudioVideoAdaptationSets = hasVideoOrAudioAdaptationSets(period);
     for (int i = 0; i < period.adaptationSets.size(); i++) {
       AdaptationSet adaptationSet = period.adaptationSets.get(i);
@@ -1191,21 +1169,23 @@ public final class DashMediaSource extends BaseMediaSource {
       }
       @Nullable DashSegmentIndex index = representations.get(0).getIndex();
       if (index == null) {
-        return periodDurationUs;
+        return periodStartTimeInManifestUs + periodDurationUs;
       }
       int availableSegmentCount = index.getAvailableSegmentCount(periodDurationUs, nowUnixTimeUs);
       if (availableSegmentCount == 0) {
-        return 0;
+        return periodStartTimeInManifestUs;
       }
       long firstAvailableSegmentNum =
           index.getFirstAvailableSegmentNum(periodDurationUs, nowUnixTimeUs);
       long lastAvailableSegmentNum = firstAvailableSegmentNum + availableSegmentCount - 1;
-      long adaptationSetAvailableEndTimeUs =
-          index.getTimeUs(lastAvailableSegmentNum)
+      long adaptationSetAvailableEndTimeInManifestUs =
+          periodStartTimeInManifestUs
+              + index.getTimeUs(lastAvailableSegmentNum)
               + index.getDurationUs(lastAvailableSegmentNum, periodDurationUs);
-      availableEndTimeUs = min(availableEndTimeUs, adaptationSetAvailableEndTimeUs);
+      availableEndTimeInManifestUs =
+          min(availableEndTimeInManifestUs, adaptationSetAvailableEndTimeInManifestUs);
     }
-    return availableEndTimeUs;
+    return availableEndTimeInManifestUs;
   }
 
   private static boolean isIndexExplicit(Period period) {
diff --git a/library/dash/src/main/java/com/google/android/exoplayer2/source/dash/manifest/Period.java b/library/dash/src/main/java/com/google/android/exoplayer2/source/dash/manifest/Period.java
index b472aed50cf9e7467eb98a1e3b261d48706eec6c..b5b852ed7e819dc9fd2c77bfcf6b8d1b75879e68 100644
--- a/library/dash/src/main/java/com/google/android/exoplayer2/source/dash/manifest/Period.java
+++ b/library/dash/src/main/java/com/google/android/exoplayer2/source/dash/manifest/Period.java
@@ -30,9 +30,7 @@ public class Period {
    */
   @Nullable public final String id;
 
-  /**
-   * The start time of the period in milliseconds.
-   */
+  /** The start time of the period in milliseconds, relative to the start of the manifest. */
   public final long startMs;
 
   /**
diff --git a/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/SpeedProvider.java b/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/SpeedProvider.java
index f8109e031c7db4e147e27534a8dea523e91896da..ad2b3077504f6234a34b6decf28958086ef4eed3 100644
--- a/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/SpeedProvider.java
+++ b/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/SpeedProvider.java
@@ -16,7 +16,7 @@
 package com.google.android.exoplayer2.transformer;
 
 /** A custom interface that determines the speed for media at specific timestamps. */
-public interface SpeedProvider {
+/* package */ interface SpeedProvider {
 
   /**
    * Provides the speed that the media should be played at, based on the timeUs.