add progress callback

add progress callback

app/src/main/java/com/frank/ffmpeg/FFmpegCmd.java

@@ -70,6 +70,7 @@ public class FFmpegCmd {
      * @param onHandleListener the callback for executing command
      */
     public static void execute(final List<String[]> commands, final OnHandleListener onHandleListener) {
+        mProgressListener = onHandleListener;
         new Thread(new Runnable() {
             @Override
             public void run() {
@@ -87,6 +88,7 @@ public class FFmpegCmd {
                 if (onHandleListener != null) {
                     onHandleListener.onEnd(result, null);
                 }
+                mProgressListener = null;
             }
         }).start();
     }

app/src/main/java/com/frank/ffmpeg/handler/FFmpegHandler.java

@@ -89,6 +89,11 @@ public class FFmpegHandler {
                 mHandler.obtainMessage(MSG_BEGIN).sendToTarget();
             }
 
+            @Override
+            public void onProgress(int progress, int duration) {
+                mHandler.obtainMessage(MSG_PROGRESS, progress, duration).sendToTarget();
+            }
+
             @Override
             public void onEnd(int resultCode, String resultMsg) {
                 Log.i(TAG, "handle onEnd...");