/* get log level */
int mm_camcorder_get_log_level(void);
+/* extra preview */
+int mm_camcorder_set_extra_preview_stream_format(MMHandleType camcorder, int stream_id, int pixel_format, int width, int height, int fps);
+int mm_camcorder_get_extra_preview_stream_format(MMHandleType camcorder, int stream_id, int *pixel_format, int *width, int *height, int *fps);
+
/**
@}
*/