diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index 4edc5a5de1..05ff1b9535 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -65,6 +65,11 @@
   Matroska or MP4.
 * Javadocs: Add favicon for easier identification in browser tabs
 * FMP4: Add support for encrypted AC-4 tracks.
+* Reduce startup latency for DASH and SmoothStreaming adaptive playbacks.
+  In previous versions, codec initialization would only occur after the network
+  connection for requesting the first media segment had been established. Codec
+  initialization can now occur before this network connection being established,
+  reducing startup latency.
 
 ### 2.11.1 (2019-12-20) ###
 
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/source/chunk/ContainerMediaChunk.java b/library/core/src/main/java/com/google/android/exoplayer2/source/chunk/ContainerMediaChunk.java
index ba7c0d0d5b..5003208f7b 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/source/chunk/ContainerMediaChunk.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/source/chunk/ContainerMediaChunk.java
@@ -111,22 +111,21 @@ public class ContainerMediaChunk extends BaseMediaChunk {
   @SuppressWarnings("NonAtomicVolatileUpdate")
   @Override
   public final void load() throws IOException, InterruptedException {
-    DataSpec loadDataSpec = dataSpec.subrange(nextLoadPosition);
+    if (nextLoadPosition == 0) {
+      // Configure the output and set it as the target for the extractor wrapper.
+      BaseMediaChunkOutput output = getOutput();
+      output.setSampleOffsetUs(sampleOffsetUs);
+      extractorWrapper.init(
+          getTrackOutputProvider(output),
+          clippedStartTimeUs == C.TIME_UNSET ? C.TIME_UNSET : (clippedStartTimeUs - sampleOffsetUs),
+          clippedEndTimeUs == C.TIME_UNSET ? C.TIME_UNSET : (clippedEndTimeUs - sampleOffsetUs));
+    }
     try {
       // Create and open the input.
-      ExtractorInput input = new DefaultExtractorInput(dataSource,
-          loadDataSpec.absoluteStreamPosition, dataSource.open(loadDataSpec));
-      if (nextLoadPosition == 0) {
-        // Configure the output and set it as the target for the extractor wrapper.
-        BaseMediaChunkOutput output = getOutput();
-        output.setSampleOffsetUs(sampleOffsetUs);
-        extractorWrapper.init(
-            getTrackOutputProvider(output),
-            clippedStartTimeUs == C.TIME_UNSET
-                ? C.TIME_UNSET
-                : (clippedStartTimeUs - sampleOffsetUs),
-            clippedEndTimeUs == C.TIME_UNSET ? C.TIME_UNSET : (clippedEndTimeUs - sampleOffsetUs));
-      }
+      DataSpec loadDataSpec = dataSpec.subrange(nextLoadPosition);
+      ExtractorInput input =
+          new DefaultExtractorInput(
+              dataSource, loadDataSpec.absoluteStreamPosition, dataSource.open(loadDataSpec));
       // Load and decode the sample data.
       try {
         Extractor extractor = extractorWrapper.extractor;
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/source/chunk/InitializationChunk.java b/library/core/src/main/java/com/google/android/exoplayer2/source/chunk/InitializationChunk.java
index 37c70d5498..892a4f1e32 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/source/chunk/InitializationChunk.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/source/chunk/InitializationChunk.java
@@ -70,17 +70,18 @@ public final class InitializationChunk extends Chunk {
   @SuppressWarnings("NonAtomicVolatileUpdate")
   @Override
   public void load() throws IOException, InterruptedException {
-    DataSpec loadDataSpec = dataSpec.subrange(nextLoadPosition);
+    if (nextLoadPosition == 0) {
+      extractorWrapper.init(
+          /* trackOutputProvider= */ null,
+          /* startTimeUs= */ C.TIME_UNSET,
+          /* endTimeUs= */ C.TIME_UNSET);
+    }
     try {
       // Create and open the input.
-      ExtractorInput input = new DefaultExtractorInput(dataSource,
-          loadDataSpec.absoluteStreamPosition, dataSource.open(loadDataSpec));
-      if (nextLoadPosition == 0) {
-        extractorWrapper.init(
-            /* trackOutputProvider= */ null,
-            /* startTimeUs= */ C.TIME_UNSET,
-            /* endTimeUs= */ C.TIME_UNSET);
-      }
+      DataSpec loadDataSpec = dataSpec.subrange(nextLoadPosition);
+      ExtractorInput input =
+          new DefaultExtractorInput(
+              dataSource, loadDataSpec.absoluteStreamPosition, dataSource.open(loadDataSpec));
       // Load and decode the initialization data.
       try {
         Extractor extractor = extractorWrapper.extractor;
@@ -96,5 +97,4 @@ public final class InitializationChunk extends Chunk {
       Util.closeQuietly(dataSource);
     }
   }
-
 }
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/source/chunk/SingleSampleMediaChunk.java b/library/core/src/main/java/com/google/android/exoplayer2/source/chunk/SingleSampleMediaChunk.java
index d53caf8e10..00d841eee0 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/source/chunk/SingleSampleMediaChunk.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/source/chunk/SingleSampleMediaChunk.java
@@ -91,19 +91,19 @@ public final class SingleSampleMediaChunk extends BaseMediaChunk {
   @SuppressWarnings("NonAtomicVolatileUpdate")
   @Override
   public void load() throws IOException, InterruptedException {
-    DataSpec loadDataSpec = dataSpec.subrange(nextLoadPosition);
+    BaseMediaChunkOutput output = getOutput();
+    output.setSampleOffsetUs(0);
+    TrackOutput trackOutput = output.track(0, trackType);
+    trackOutput.format(sampleFormat);
     try {
       // Create and open the input.
+      DataSpec loadDataSpec = dataSpec.subrange(nextLoadPosition);
       long length = dataSource.open(loadDataSpec);
       if (length != C.LENGTH_UNSET) {
         length += nextLoadPosition;
       }
       ExtractorInput extractorInput =
           new DefaultExtractorInput(dataSource, nextLoadPosition, length);
-      BaseMediaChunkOutput output = getOutput();
-      output.setSampleOffsetUs(0);
-      TrackOutput trackOutput = output.track(0, trackType);
-      trackOutput.format(sampleFormat);
       // Load the sample data.
       int result = 0;
       while (result != C.RESULT_END_OF_INPUT) {
@@ -117,5 +117,4 @@ public final class SingleSampleMediaChunk extends BaseMediaChunk {
     }
     loadCompleted = true;
   }
-
 }