diff --git a/libusbcamera/libusbcamera.iml b/libusbcamera/libusbcamera.iml
index 6f13e12..82edf54 100644
--- a/libusbcamera/libusbcamera.iml
+++ b/libusbcamera/libusbcamera.iml
@@ -9,7 +9,6 @@
     <facet type="android" name="Android">
       <configuration>
         <option name="SELECTED_BUILD_VARIANT" value="debug" />
-        <option name="SELECTED_TEST_ARTIFACT" value="_android_test_" />
         <option name="ASSEMBLE_TASK_NAME" value="assembleDebug" />
         <option name="COMPILE_JAVA_TASK_NAME" value="compileDebugSources" />
         <afterSyncTasks>
@@ -20,11 +19,11 @@
         <option name="RES_FOLDER_RELATIVE_PATH" value="/src/main/res" />
         <option name="RES_FOLDERS_RELATIVE_PATH" value="file://$MODULE_DIR$/src/main/res" />
         <option name="ASSETS_FOLDER_RELATIVE_PATH" value="/src/main/assets" />
-        <option name="LIBRARY_PROJECT" value="true" />
+        <option name="PROJECT_TYPE" value="1" />
       </configuration>
     </facet>
   </component>
-  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_7" inherit-compiler-output="false">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_7">
     <output url="file://$MODULE_DIR$/build/intermediates/classes/debug" />
     <output-test url="file://$MODULE_DIR$/build/intermediates/classes/test/debug" />
     <exclude-output />
@@ -48,7 +47,6 @@
       <sourceFolder url="file://$MODULE_DIR$/src/debug/assets" type="java-resource" />
       <sourceFolder url="file://$MODULE_DIR$/src/debug/aidl" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/src/debug/java" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/src/debug/jni" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/src/debug/rs" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/src/debug/shaders" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/src/testDebug/res" type="java-test-resource" />
@@ -56,7 +54,6 @@
       <sourceFolder url="file://$MODULE_DIR$/src/testDebug/assets" type="java-test-resource" />
       <sourceFolder url="file://$MODULE_DIR$/src/testDebug/aidl" isTestSource="true" />
       <sourceFolder url="file://$MODULE_DIR$/src/testDebug/java" isTestSource="true" />
-      <sourceFolder url="file://$MODULE_DIR$/src/testDebug/jni" isTestSource="true" />
       <sourceFolder url="file://$MODULE_DIR$/src/testDebug/rs" isTestSource="true" />
       <sourceFolder url="file://$MODULE_DIR$/src/testDebug/shaders" isTestSource="true" />
       <sourceFolder url="file://$MODULE_DIR$/src/main/res" type="java-resource" />
@@ -64,25 +61,22 @@
       <sourceFolder url="file://$MODULE_DIR$/src/main/assets" type="java-resource" />
       <sourceFolder url="file://$MODULE_DIR$/src/main/aidl" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/src/main/jni" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/src/main/rs" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/src/main/shaders" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/src/androidTest/res" type="java-test-resource" />
-      <sourceFolder url="file://$MODULE_DIR$/src/androidTest/resources" type="java-test-resource" />
-      <sourceFolder url="file://$MODULE_DIR$/src/androidTest/assets" type="java-test-resource" />
-      <sourceFolder url="file://$MODULE_DIR$/src/androidTest/aidl" isTestSource="true" />
-      <sourceFolder url="file://$MODULE_DIR$/src/androidTest/java" isTestSource="true" />
-      <sourceFolder url="file://$MODULE_DIR$/src/androidTest/jni" isTestSource="true" />
-      <sourceFolder url="file://$MODULE_DIR$/src/androidTest/rs" isTestSource="true" />
-      <sourceFolder url="file://$MODULE_DIR$/src/androidTest/shaders" isTestSource="true" />
       <sourceFolder url="file://$MODULE_DIR$/src/test/res" type="java-test-resource" />
       <sourceFolder url="file://$MODULE_DIR$/src/test/resources" type="java-test-resource" />
       <sourceFolder url="file://$MODULE_DIR$/src/test/assets" type="java-test-resource" />
       <sourceFolder url="file://$MODULE_DIR$/src/test/aidl" isTestSource="true" />
       <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
-      <sourceFolder url="file://$MODULE_DIR$/src/test/jni" isTestSource="true" />
       <sourceFolder url="file://$MODULE_DIR$/src/test/rs" isTestSource="true" />
       <sourceFolder url="file://$MODULE_DIR$/src/test/shaders" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/src/androidTest/res" type="java-test-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/androidTest/resources" type="java-test-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/androidTest/assets" type="java-test-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/androidTest/aidl" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/src/androidTest/java" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/src/androidTest/rs" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/src/androidTest/shaders" isTestSource="true" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/annotations" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/blame" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/bundles" />
@@ -102,30 +96,30 @@
     </content>
     <orderEntry type="jdk" jdkName="Android API 25 Platform" jdkType="Android SDK" />
     <orderEntry type="sourceFolder" forTests="false" />
-    <orderEntry type="library" exported="" scope="TEST" name="runner-0.5" level="project" />
-    <orderEntry type="library" exported="" scope="TEST" name="espresso-idling-resource-2.2.2" level="project" />
-    <orderEntry type="library" exported="" scope="TEST" name="hamcrest-library-1.3" level="project" />
-    <orderEntry type="library" exported="" scope="TEST" name="hamcrest-integration-1.3" level="project" />
-    <orderEntry type="library" exported="" name="support-core-ui-25.3.1" level="project" />
-    <orderEntry type="library" exported="" name="support-core-utils-25.3.1" level="project" />
-    <orderEntry type="library" exported="" name="support-fragment-25.3.1" level="project" />
-    <orderEntry type="library" exported="" scope="TEST" name="jsr305-2.0.1" level="project" />
-    <orderEntry type="library" exported="" scope="TEST" name="espresso-core-2.2.2" level="project" />
-    <orderEntry type="library" exported="" scope="TEST" name="exposed-instrumentation-api-publish-0.5" level="project" />
-    <orderEntry type="library" exported="" scope="TEST" name="rules-0.5" level="project" />
-    <orderEntry type="library" exported="" scope="TEST" name="javax.annotation-api-1.2" level="project" />
-    <orderEntry type="library" exported="" scope="TEST" name="javax.inject-1" level="project" />
-    <orderEntry type="library" exported="" name="common-1.5.20" level="project" />
-    <orderEntry type="library" exported="" name="support-v4-25.3.1" level="project" />
-    <orderEntry type="library" exported="" name="support-media-compat-25.3.1" level="project" />
-    <orderEntry type="library" exported="" scope="TEST" name="javawriter-2.1.1" level="project" />
-    <orderEntry type="library" exported="" scope="TEST" name="hamcrest-core-1.3" level="project" />
-    <orderEntry type="library" exported="" scope="TEST" name="junit-4.12" level="project" />
-    <orderEntry type="library" exported="" name="recyclerview-v7-25.3.1" level="project" />
-    <orderEntry type="library" exported="" name="support-annotations-25.3.1" level="project" />
-    <orderEntry type="library" exported="" name="appcompat-v7-25.3.1" level="project" />
-    <orderEntry type="library" exported="" name="support-vector-drawable-25.3.1" level="project" />
-    <orderEntry type="library" exported="" name="support-compat-25.3.1" level="project" />
-    <orderEntry type="library" exported="" name="animated-vector-drawable-25.3.1" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="com.android.support.test:exposed-instrumentation-api-publish-0.5" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="junit:junit:4.12@jar" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="javax.inject:javax.inject:1@jar" level="project" />
+    <orderEntry type="library" exported="" name="com.android.support:support-core-ui-25.3.1" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="com.squareup:javawriter:2.1.1@jar" level="project" />
+    <orderEntry type="library" exported="" name="com.android.support:support-compat-25.3.1" level="project" />
+    <orderEntry type="library" exported="" name="com.serenegiant:common-1.5.20" level="project" />
+    <orderEntry type="library" exported="" name="com.android.support:support-core-utils-25.3.1" level="project" />
+    <orderEntry type="library" exported="" name="com.android.support:support-v4-25.3.1" level="project" />
+    <orderEntry type="library" exported="" name="com.android.support:support-fragment-25.3.1" level="project" />
+    <orderEntry type="library" exported="" name="com.android.support:support-media-compat-25.3.1" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="com.google.code.findbugs:jsr305:2.0.1@jar" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="org.hamcrest:hamcrest-core:1.3@jar" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="com.android.support.test.espresso:espresso-core-2.2.2" level="project" />
+    <orderEntry type="library" exported="" name="com.android.support:animated-vector-drawable-25.3.1" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="com.android.support.test:rules-0.5" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="org.hamcrest:hamcrest-library:1.3@jar" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="org.hamcrest:hamcrest-integration:1.3@jar" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="com.android.support.test:runner-0.5" level="project" />
+    <orderEntry type="library" exported="" name="com.android.support:appcompat-v7-25.3.1" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="com.android.support.test.espresso:espresso-idling-resource-2.2.2" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="javax.annotation:javax.annotation-api:1.2@jar" level="project" />
+    <orderEntry type="library" exported="" name="com.android.support:support-vector-drawable-25.3.1" level="project" />
+    <orderEntry type="library" exported="" name="com.android.support:recyclerview-v7-25.3.1" level="project" />
+    <orderEntry type="library" exported="" name="com.android.support:support-annotations:25.3.1@jar" level="project" />
   </component>
 </module>
\ No newline at end of file
diff --git a/libusbcamera/src/main/java/com/serenegiant/usb/encoder/biz/H264EncodeConsumer.java b/libusbcamera/src/main/java/com/serenegiant/usb/encoder/biz/H264EncodeConsumer.java
index df089a1..f35ae4e 100644
--- a/libusbcamera/src/main/java/com/serenegiant/usb/encoder/biz/H264EncodeConsumer.java
+++ b/libusbcamera/src/main/java/com/serenegiant/usb/encoder/biz/H264EncodeConsumer.java
@@ -255,7 +255,7 @@ public class H264EncodeConsumer extends Thread {
         final MediaFormat format = MediaFormat.createVideoFormat(MIME_TYPE, mWidth, mHeight);
         format.setInteger(MediaFormat.KEY_COLOR_FORMAT, mColorFormat);
         format.setInteger(MediaFormat.KEY_BIT_RATE, calcBitRate());
-        format.setInteger(MediaFormat.KEY_FRAME_RATE, 15);
+        format.setInteger(MediaFormat.KEY_FRAME_RATE, 30);
         format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, 1);
 
         try {