fix looper, fix i frame interval default

Author: ypresto

lib/src/main/java/net/ypresto/androidtranscoder/MediaTranscoder.java

@@ -16,6 +16,7 @@
 package net.ypresto.androidtranscoder;
 
 import android.os.Handler;
+import android.os.Looper;
 import android.util.Log;
 
 import net.ypresto.androidtranscoder.engine.MediaTranscoderEngine;
@@ -65,7 +66,9 @@ public static MediaTranscoder getInstance() {
      * @param listener         Listener instance for callback.
      */
     public void transcodeVideo(final FileDescriptor inFileDescriptor, final String outPath, final Listener listener) {
-        final Handler handler = new Handler();
+        Looper looper = Looper.myLooper();
+        if (looper == null) looper = Looper.getMainLooper();
+        final Handler handler = new Handler(looper);
         mExecutor.execute(new Runnable() {
             @Override
             public void run() {

lib/src/main/java/net/ypresto/androidtranscoder/format/MediaFormatPresets.java

@@ -32,7 +32,7 @@ public static MediaFormat getExportPreset960x540() {
         format.setInteger(MediaFormat.KEY_BIT_RATE, 5400 * 1000);
         format.setInteger(MediaFormat.KEY_COLOR_FORMAT, MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface);
         format.setInteger(MediaFormat.KEY_FRAME_RATE, 30);
-        format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, 10);
+        format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, 1);
         return format;
     }
 }