Add function to return current format and set initial parameters

source/app/InputStream.h

@@ -104,12 +104,12 @@ public:
     YUVFormat = 0,  // Use color space.
   };
 
-  Bool needFormatDialog( QString filename );
-  Bool guessFormat( QString filename, UInt& rWidth, UInt& rHeight, Int& rInputFormat, UInt& rFrameRate );
-
   Bool open( QString filename, UInt width, UInt height, Int input_format, UInt frame_rate );
   Void close();
 
+  Bool guessFormat( QString filename, UInt& rWidth, UInt& rHeight, Int& rInputFormat, UInt& rFrameRate );
+  Void getFormat( UInt& rWidth, UInt& rHeight, Int& rInputFormat, UInt& rFrameRate );
+
   Void readNextFrame();
 
   Bool writeFrame( const QString& filename );