diff --git a/circle.yml b/circle.yml
index d6fae5a43..ed5eaf8ab 100644
--- a/circle.yml
+++ b/circle.yml
@@ -13,10 +13,10 @@ general:
 
 dependencies:
     override:
-        - sudo apt-get install -y valgrind
+        - echo "ok"
 
 test:
     override:
-        - (cd trunk && ./configure --without-ssl && make)
+        - (cd trunk && ./configure --without-ssl --without-valgrind && make)
         - (cd trunk && ./objs/srs_utest)
 
diff --git a/trunk/auto/options.sh b/trunk/auto/options.sh
index df85b23ae..b3d0ee8f2 100755
--- a/trunk/auto/options.sh
+++ b/trunk/auto/options.sh
@@ -73,7 +73,7 @@ SRS_EXPORT_LIBRTMP_PROJECT=NO
 # export the srs-librtmp to a single .h and .c, NO to disable it.
 SRS_EXPORT_LIBRTMP_SINGLE=NO
 # valgrind
-SRS_VALGRIND=YES
+SRS_VALGRIND=NO
 #
 ################################################################
 # presets
diff --git a/trunk/ide/srs_xcode/srs_xcode.xcodeproj/project.pbxproj b/trunk/ide/srs_xcode/srs_xcode.xcodeproj/project.pbxproj
index 779250e56..c92ed6415 100644
--- a/trunk/ide/srs_xcode/srs_xcode.xcodeproj/project.pbxproj
+++ b/trunk/ide/srs_xcode/srs_xcode.xcodeproj/project.pbxproj
@@ -445,6 +445,7 @@
 		3CECAF961EDC100F00C50501 /* sched.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; name = sched.c; path = "../../../objs/state-threads-1.9.1/sched.c"; sourceTree = "<group>"; };
 		3CECAF971EDC100F00C50501 /* stk.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; name = stk.c; path = "../../../objs/state-threads-1.9.1/stk.c"; sourceTree = "<group>"; };
 		3CECAF981EDC100F00C50501 /* sync.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; name = sync.c; path = "../../../objs/state-threads-1.9.1/sync.c"; sourceTree = "<group>"; };
+		3CFBDA271F0338A40054D63E /* circle.yml */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; name = circle.yml; path = ../../../circle.yml; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -819,6 +820,7 @@
 		3C1EE6D21AB1366500576EE9 /* doc */ = {
 			isa = PBXGroup;
 			children = (
+				3CFBDA271F0338A40054D63E /* circle.yml */,
 				3C1EE6D31AB1367D00576EE9 /* AUTHORS.txt */,
 				3C1EE6D51AB1367D00576EE9 /* LICENSE */,
 				3C1EE6D61AB1367D00576EE9 /* README.md */,
diff --git a/trunk/src/kernel/srs_kernel_mp4.cpp b/trunk/src/kernel/srs_kernel_mp4.cpp
index 79e1c388c..09e2c1cd1 100644
--- a/trunk/src/kernel/srs_kernel_mp4.cpp
+++ b/trunk/src/kernel/srs_kernel_mp4.cpp
@@ -1956,7 +1956,7 @@ SrsMp4AudioSampleEntry* SrsMp4TrackBox::mp4a()
     return box? box->mp4a():NULL;
 }
 
-SrsMp4TrackHeaderBox::SrsMp4TrackHeaderBox() : creation_time(0), modification_time(0), track_ID(0)
+SrsMp4TrackHeaderBox::SrsMp4TrackHeaderBox() : creation_time(0), modification_time(0), track_ID(0), duration(0)
 {
     type = SrsMp4BoxTypeTKHD;
     
@@ -2263,7 +2263,7 @@ void SrsMp4MediaBox::set_minf(SrsMp4MediaInformationBox* v)
     boxes.push_back(v);
 }
 
-SrsMp4MediaHeaderBox::SrsMp4MediaHeaderBox() : duration(0)
+SrsMp4MediaHeaderBox::SrsMp4MediaHeaderBox() : creation_time(0), modification_time(0), duration(0)
 {
     type = SrsMp4BoxTypeMDHD;
     language = 0;
@@ -5477,7 +5477,7 @@ int SrsMp4Decoder::load_next_box(SrsMp4Box** ppbox, uint32_t required_box_type)
             return ret;
         }
         
-        if (!required_box_type || box->type == required_box_type) {
+        if (!required_box_type || (uint32_t)box->type == required_box_type) {
             *ppbox = box;
             break;
         }
@@ -5505,7 +5505,7 @@ int SrsMp4Decoder::do_load_next_box(SrsMp4Box** ppbox, uint32_t required_box_typ
         // 1. Any box, when no box type is required.
         // 2. Matched box, when box type match the required type.
         // 3. Mdat box, always decode the mdat because we only decode the header of it.
-        if (!required_box_type || box->type == required_box_type || box->is_mdat()) {
+        if (!required_box_type || (uint32_t)box->type == required_box_type || box->is_mdat()) {
             ret = box->decode(buffer);
         }
         
@@ -5885,7 +5885,7 @@ int SrsMp4Encoder::copy_sequence_header(bool vsh, uint8_t* sample, uint32_t nb_s
     int ret = ERROR_SUCCESS;
     
     if (vsh && !pavcc.empty()) {
-        if (nb_sample == pavcc.size() && srs_bytes_equals(sample, &pavcc[0], (int)pavcc.size())) {
+        if (nb_sample == (uint32_t)pavcc.size() && srs_bytes_equals(sample, &pavcc[0], (int)pavcc.size())) {
             return ret;
         }
         
@@ -5895,7 +5895,7 @@ int SrsMp4Encoder::copy_sequence_header(bool vsh, uint8_t* sample, uint32_t nb_s
     }
     
     if (!vsh && !pasc.empty()) {
-        if (nb_sample == pasc.size() && srs_bytes_equals(sample, &pasc[0], (int)pasc.size())) {
+        if (nb_sample == (uint32_t)pasc.size() && srs_bytes_equals(sample, &pasc[0], (int)pasc.size())) {
             return ret;
         }