diff --git a/cmds/stagefright/stagefright.cpp b/cmds/stagefright/stagefright.cpp
index 5bdbfbb..115b07c 100644
--- a/cmds/stagefright/stagefright.cpp
+++ b/cmds/stagefright/stagefright.cpp
@@ -523,7 +523,7 @@
     }
 
     sp<MetaData> params = new MetaData;
-    params->setInt32(kKeyNotRealTime, true);
+    params->setInt32(kKeyRealTimeRecording, false);
     CHECK_EQ(writer->start(params.get()), (status_t)OK);
 
     while (!writer->reachedEOS()) {
diff --git a/include/media/stagefright/MPEG4Writer.h b/include/media/stagefright/MPEG4Writer.h
index 88df6b0..3ef6b9a 100644
--- a/include/media/stagefright/MPEG4Writer.h
+++ b/include/media/stagefright/MPEG4Writer.h
@@ -74,6 +74,7 @@
 
     int  mFd;
     status_t mInitCheck;
+    bool mIsRealTimeRecording;
     bool mUse4ByteNalLength;
     bool mUse32BitOffset;
     bool mIsFileSizeLimitExplicitlyRequested;
@@ -168,6 +169,13 @@
     // Only makes sense for H.264/AVC
     bool useNalLengthFour();
 
+    // Return whether the writer is used for real time recording.
+    // In real time recording mode, new samples will be allowed to buffered into
+    // chunks in higher priority thread, even though the file writer has not
+    // drained the chunks yet.
+    // By default, real time recording is on.
+    bool isRealTimeRecording() const;
+
     void lock();
     void unlock();
 
diff --git a/include/media/stagefright/MetaData.h b/include/media/stagefright/MetaData.h
index 9ab3edc..de3fc36 100644
--- a/include/media/stagefright/MetaData.h
+++ b/include/media/stagefright/MetaData.h
@@ -112,7 +112,7 @@
     // kKeyTrackTimeStatus is used to track progress in elapsed time
     kKeyTrackTimeStatus   = 'tktm',  // int64_t
 
-    kKeyNotRealTime       = 'ntrt',  // bool (int32_t)
+    kKeyRealTimeRecording = 'rtrc',  // bool (int32_t)
     kKeyNumBuffers        = 'nbbf',  // int32_t
 
     // Ogg files can be tagged to be automatically looping...
diff --git a/libvideoeditor/vss/stagefrightshells/src/VideoEditorUtils.cpp b/libvideoeditor/vss/stagefrightshells/src/VideoEditorUtils.cpp
index 5309bd4..5a7237d 100755
--- a/libvideoeditor/vss/stagefrightshells/src/VideoEditorUtils.cpp
+++ b/libvideoeditor/vss/stagefrightshells/src/VideoEditorUtils.cpp
@@ -189,8 +189,8 @@
     if (meta->findInt64(kKeyTrackTimeStatus, &int64Data)) {
         LOG1("displayMetaData kKeyTrackTimeStatus %lld", int64Data);
     }
-    if (meta->findInt32(kKeyNotRealTime, &int32Data)) {
-        LOG1("displayMetaData kKeyNotRealTime %d", int32Data);
+    if (meta->findInt32(kKeyRealTimeRecording, &int32Data)) {
+        LOG1("displayMetaData kKeyRealTimeRecording %d", int32Data);
     }
 }
 
diff --git a/media/libstagefright/MPEG4Writer.cpp b/media/libstagefright/MPEG4Writer.cpp
index 316f669..a0f17b5 100644
--- a/media/libstagefright/MPEG4Writer.cpp
+++ b/media/libstagefright/MPEG4Writer.cpp
@@ -212,7 +212,6 @@
     int64_t mTrackDurationUs;
     int64_t mMaxChunkDurationUs;
 
-    bool mIsRealTimeRecording;
     int64_t mEstimatedTrackSizeBytes;
     int64_t mMdatSizeBytes;
     int32_t mTimeScale;
@@ -335,6 +334,7 @@
 MPEG4Writer::MPEG4Writer(const char *filename)
     : mFd(-1),
       mInitCheck(NO_INIT),
+      mIsRealTimeRecording(true),
       mUse4ByteNalLength(true),
       mUse32BitOffset(true),
       mIsFileSizeLimitExplicitlyRequested(false),
@@ -359,6 +359,7 @@
 MPEG4Writer::MPEG4Writer(int fd)
     : mFd(dup(fd)),
       mInitCheck(mFd < 0? NO_INIT: OK),
+      mIsRealTimeRecording(true),
       mUse4ByteNalLength(true),
       mUse32BitOffset(true),
       mIsFileSizeLimitExplicitlyRequested(false),
@@ -596,6 +597,11 @@
         mUse4ByteNalLength = false;
     }
 
+    int32_t isRealTimeRecording;
+    if (param && param->findInt32(kKeyRealTimeRecording, &isRealTimeRecording)) {
+        mIsRealTimeRecording = isRealTimeRecording;
+    }
+
     mStartTimestampUs = -1;
 
     if (mStarted) {
@@ -1640,12 +1646,18 @@
             mChunkReadyCondition.wait(mLock);
         }
 
-        // Actual write without holding the lock in order to
-        // reduce the blocking time for media track threads.
+        // In real time recording mode, write without holding the lock in order
+        // to reduce the blocking time for media track threads.
+        // Otherwise, hold the lock until the existing chunks get written to the
+        // file.
         if (chunkFound) {
-            mLock.unlock();
+            if (mIsRealTimeRecording) {
+                mLock.unlock();
+            }
             writeChunkToFile(&chunk);
-            mLock.lock();
+            if (mIsRealTimeRecording) {
+                mLock.lock();
+            }
         }
     }
 
@@ -1695,18 +1707,10 @@
         mRotation = rotationDegrees;
     }
 
-    mIsRealTimeRecording = true;
-    {
-        int32_t isNotRealTime;
-        if (params && params->findInt32(kKeyNotRealTime, &isNotRealTime)) {
-            mIsRealTimeRecording = (isNotRealTime == 0);
-        }
-    }
-
     initTrackingProgressStatus(params);
 
     sp<MetaData> meta = new MetaData;
-    if (mIsRealTimeRecording && mOwner->numTracks() > 1) {
+    if (mOwner->isRealTimeRecording() && mOwner->numTracks() > 1) {
         /*
          * This extra delay of accepting incoming audio/video signals
          * helps to align a/v start time at the beginning of a recording
@@ -2084,7 +2088,10 @@
     } else {
         prctl(PR_SET_NAME, (unsigned long)"VideoTrackEncoding", 0, 0, 0);
     }
-    androidSetThreadPriority(0, ANDROID_PRIORITY_AUDIO);
+
+    if (mOwner->isRealTimeRecording()) {
+        androidSetThreadPriority(0, ANDROID_PRIORITY_AUDIO);
+    }
 
     sp<MetaData> meta_data;
 
@@ -2245,7 +2252,7 @@
 
         }
 
-        if (mIsRealTimeRecording) {
+        if (mOwner->isRealTimeRecording()) {
             if (mIsAudio) {
                 updateDriftTime(meta_data);
             }
@@ -2531,6 +2538,10 @@
     return mDriftTimeUs;
 }
 
+bool MPEG4Writer::isRealTimeRecording() const {
+    return mIsRealTimeRecording;
+}
+
 bool MPEG4Writer::useNalLengthFour() {
     return mUse4ByteNalLength;
 }
diff --git a/media/libstagefright/MediaMuxer.cpp b/media/libstagefright/MediaMuxer.cpp
index b948fe2..388c65b 100644
--- a/media/libstagefright/MediaMuxer.cpp
+++ b/media/libstagefright/MediaMuxer.cpp
@@ -107,6 +107,7 @@
     Mutex::Autolock autoLock(mMuxerLock);
     if (mState == INITIALIZED) {
         mState = STARTED;
+        mFileMeta->setInt32(kKeyRealTimeRecording, false);
         return mWriter->start(mFileMeta.get());
     } else {
         ALOGE("start() is called in invalid state %d", mState);
diff --git a/media/libstagefright/codecs/aacdec/SoftAAC2.cpp b/media/libstagefright/codecs/aacdec/SoftAAC2.cpp
index 8ba2afb..cf81c16 100644
--- a/media/libstagefright/codecs/aacdec/SoftAAC2.cpp
+++ b/media/libstagefright/codecs/aacdec/SoftAAC2.cpp
@@ -29,6 +29,7 @@
 
 #define DRC_DEFAULT_MOBILE_REF_LEVEL 64  /* 64*-0.25dB = -16 dB below full scale for mobile conf */
 #define DRC_DEFAULT_MOBILE_DRC_CUT   127 /* maximum compression of dynamic range for mobile conf */
+#define DRC_DEFAULT_MOBILE_DRC_BOOST 127 /* maximum compression of dynamic range for mobile conf */
 #define MAX_CHANNEL_COUNT            6  /* maximum number of audio channels that can be decoded */
 // names of properties that can be used to override the default DRC settings
 #define PROP_DRC_OVERRIDE_REF_LEVEL  "aac_drc_reference_level"
@@ -146,6 +147,8 @@
         unsigned boost = atoi(value);
         ALOGV("AAC decoder using AAC_DRC_BOOST_FACTOR of %d", boost);
         aacDecoder_SetParam(mAACDecoder, AAC_DRC_BOOST_FACTOR, boost);
+    } else {
+        aacDecoder_SetParam(mAACDecoder, AAC_DRC_BOOST_FACTOR, DRC_DEFAULT_MOBILE_DRC_BOOST);
     }
 
     return status;
@@ -592,6 +595,12 @@
 
 void SoftAAC2::onReset() {
     drainDecoder();
+    // reset the "configured" state
+    mInputBufferCount = 0;
+    mNumSamplesOutput = 0;
+    // To make the codec behave the same before and after a reset, we need to invalidate the
+    // streaminfo struct. This does that:
+    mStreamInfo->sampleRate = 0;
 }
 
 void SoftAAC2::onPortEnableCompleted(OMX_U32 portIndex, bool enabled) {
diff --git a/media/libstagefright/codecs/vorbis/dec/SoftVorbis.cpp b/media/libstagefright/codecs/vorbis/dec/SoftVorbis.cpp
index 922ac61..4115324 100644
--- a/media/libstagefright/codecs/vorbis/dec/SoftVorbis.cpp
+++ b/media/libstagefright/codecs/vorbis/dec/SoftVorbis.cpp
@@ -411,8 +411,19 @@
 }
 
 void SoftVorbis::onReset() {
+    mInputBufferCount = 0;
     mNumFramesOutput = 0;
-    vorbis_dsp_restart(mState);
+    if (mState != NULL) {
+        vorbis_dsp_clear(mState);
+        delete mState;
+        mState = NULL;
+    }
+
+    if (mVi != NULL) {
+        vorbis_info_clear(mVi);
+        delete mVi;
+        mVi = NULL;
+    }
 }
 
 void SoftVorbis::onPortEnableCompleted(OMX_U32 portIndex, bool enabled) {
diff --git a/services/audioflinger/ISchedulingPolicyService.cpp b/services/audioflinger/ISchedulingPolicyService.cpp
index 909b77e..218aa6b 100644
--- a/services/audioflinger/ISchedulingPolicyService.cpp
+++ b/services/audioflinger/ISchedulingPolicyService.cpp
@@ -44,7 +44,7 @@
         data.writeInt32(pid);
         data.writeInt32(tid);
         data.writeInt32(prio);
-        remote()->transact(REQUEST_PRIORITY_TRANSACTION, data, &reply);
+        remote()->transact(REQUEST_PRIORITY_TRANSACTION, data, &reply, IBinder::FLAG_ONEWAY);
         // fail on exception
         if (reply.readExceptionCode() != 0) return -1;
         return reply.readInt32();