diff --git a/cmds/stagefright/stagefright.cpp b/cmds/stagefright/stagefright.cpp
index b92a8a0..1e0e7f8 100644
--- a/cmds/stagefright/stagefright.cpp
+++ b/cmds/stagefright/stagefright.cpp
@@ -589,7 +589,7 @@
 }
 
 static void usage(const char *me) {
-    fprintf(stderr, "usage: %s\n", me);
+    fprintf(stderr, "usage: %s [options] [input_filename]\n", me);
     fprintf(stderr, "       -h(elp)\n");
     fprintf(stderr, "       -a(udio)\n");
     fprintf(stderr, "       -n repetitions\n");
@@ -607,8 +607,8 @@
                     "(video only)\n");
     fprintf(stderr, "       -S allocate buffers from a surface\n");
     fprintf(stderr, "       -T allocate buffers from a surface texture\n");
-    fprintf(stderr, "       -d(ump) filename (raw stream data to a file)\n");
-    fprintf(stderr, "       -D(ump) filename (decoded PCM data to a file)\n");
+    fprintf(stderr, "       -d(ump) output_filename (raw stream data to a file)\n");
+    fprintf(stderr, "       -D(ump) output_filename (decoded PCM data to a file)\n");
 }
 
 static void dumpCodecProfiles(const sp<IOMX>& omx, bool queryDecoders) {
diff --git a/media/libstagefright/codecs/on2/dec/SoftVPX.cpp b/media/libstagefright/codecs/on2/dec/SoftVPX.cpp
index bf9ab3a..a400b4c 100644
--- a/media/libstagefright/codecs/on2/dec/SoftVPX.cpp
+++ b/media/libstagefright/codecs/on2/dec/SoftVPX.cpp
@@ -66,7 +66,7 @@
     def.eDir = OMX_DirInput;
     def.nBufferCountMin = kNumBuffers;
     def.nBufferCountActual = def.nBufferCountMin;
-    def.nBufferSize = 256 * 1024;
+    def.nBufferSize = 768 * 1024;
     def.bEnabled = OMX_TRUE;
     def.bPopulated = OMX_FALSE;
     def.eDomain = OMX_PortDomainVideo;
diff --git a/media/libstagefright/matroska/MatroskaExtractor.cpp b/media/libstagefright/matroska/MatroskaExtractor.cpp
index 8f7d12b..7fc7037 100644
--- a/media/libstagefright/matroska/MatroskaExtractor.cpp
+++ b/media/libstagefright/matroska/MatroskaExtractor.cpp
@@ -758,31 +758,69 @@
     esds = NULL;
 }
 
-void addVorbisCodecInfo(
+status_t addVorbisCodecInfo(
         const sp<MetaData> &meta,
         const void *_codecPrivate, size_t codecPrivateSize) {
-    // printf("vorbis private data follows:\n");
     // hexdump(_codecPrivate, codecPrivateSize);
 
-    CHECK(codecPrivateSize >= 3);
+    if (codecPrivateSize < 1) {
+        return ERROR_MALFORMED;
+    }
 
     const uint8_t *codecPrivate = (const uint8_t *)_codecPrivate;
-    CHECK(codecPrivate[0] == 0x02);
 
-    size_t len1 = codecPrivate[1];
-    size_t len2 = codecPrivate[2];
+    if (codecPrivate[0] != 0x02) {
+        return ERROR_MALFORMED;
+    }
 
-    CHECK(codecPrivateSize > 3 + len1 + len2);
+    // codecInfo starts with two lengths, len1 and len2, that are
+    // "Xiph-style-lacing encoded"...
 
-    CHECK(codecPrivate[3] == 0x01);
-    meta->setData(kKeyVorbisInfo, 0, &codecPrivate[3], len1);
+    size_t offset = 1;
+    size_t len1 = 0;
+    while (offset < codecPrivateSize && codecPrivate[offset] == 0xff) {
+        len1 += 0xff;
+        ++offset;
+    }
+    if (offset >= codecPrivateSize) {
+        return ERROR_MALFORMED;
+    }
+    len1 += codecPrivate[offset++];
 
-    CHECK(codecPrivate[len1 + 3] == 0x03);
+    size_t len2 = 0;
+    while (offset < codecPrivateSize && codecPrivate[offset] == 0xff) {
+        len2 += 0xff;
+        ++offset;
+    }
+    if (offset >= codecPrivateSize) {
+        return ERROR_MALFORMED;
+    }
+    len2 += codecPrivate[offset++];
 
-    CHECK(codecPrivate[len1 + len2 + 3] == 0x05);
+    if (codecPrivateSize < offset + len1 + len2) {
+        return ERROR_MALFORMED;
+    }
+
+    if (codecPrivate[offset] != 0x01) {
+        return ERROR_MALFORMED;
+    }
+    meta->setData(kKeyVorbisInfo, 0, &codecPrivate[offset], len1);
+
+    offset += len1;
+    if (codecPrivate[offset] != 0x03) {
+        return ERROR_MALFORMED;
+    }
+
+    offset += len2;
+    if (codecPrivate[offset] != 0x05) {
+        return ERROR_MALFORMED;
+    }
+
     meta->setData(
-            kKeyVorbisBooks, 0, &codecPrivate[len1 + len2 + 3],
-            codecPrivateSize - len1 - len2 - 3);
+            kKeyVorbisBooks, 0, &codecPrivate[offset],
+            codecPrivateSize - offset);
+
+    return OK;
 }
 
 void MatroskaExtractor::addTracks() {
@@ -809,6 +847,8 @@
 
         sp<MetaData> meta = new MetaData;
 
+        status_t err = OK;
+
         switch (track->GetType()) {
             case VIDEO_TRACK:
             {
@@ -855,7 +895,8 @@
                 } else if (!strcmp("A_VORBIS", codecID)) {
                     meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_VORBIS);
 
-                    addVorbisCodecInfo(meta, codecPrivate, codecPrivateSize);
+                    err = addVorbisCodecInfo(
+                            meta, codecPrivate, codecPrivateSize);
                 } else if (!strcmp("A_MPEG/L3", codecID)) {
                     meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_MPEG);
                 } else {
@@ -872,6 +913,11 @@
                 continue;
         }
 
+        if (err != OK) {
+            ALOGE("skipping track, codec specific data was malformed.");
+            continue;
+        }
+
         long long durationNs = mSegment->GetDuration();
         meta->setInt64(kKeyDuration, (durationNs + 500) / 1000);
 
diff --git a/media/libstagefright/wifi-display/sink/TunnelRenderer.cpp b/media/libstagefright/wifi-display/sink/TunnelRenderer.cpp
index bc35aef..b913124 100644
--- a/media/libstagefright/wifi-display/sink/TunnelRenderer.cpp
+++ b/media/libstagefright/wifi-display/sink/TunnelRenderer.cpp
@@ -271,6 +271,7 @@
     if (mFirstFailedAttemptUs + 50000ll > ALooper::GetNowUs()) {
         // We're willing to wait a little while to get the right packet.
 
+#if 0
         if (!mRequestedRetransmission) {
             ALOGI("requesting retransmission of seqNo %d",
                   (mLastDequeuedExtSeqNo + 1) & 0xffff);
@@ -280,7 +281,9 @@
             notify->post();
 
             mRequestedRetransmission = true;
-        } else {
+        } else
+#endif
+        {
             ALOGI("still waiting for the correct packet to arrive.");
         }