int _mmcamcorder_initialize_extra_preview_stream(MMHandleType handle);
int _mmcamcorder_set_extra_preview_stream_format(MMHandleType camcorder, int stream_id, int pixel_format, int width, int height, int fps);
int _mmcamcorder_get_extra_preview_stream_format(MMHandleType camcorder, int stream_id, int *pixel_format, int *width, int *height, int *fps);
+int _mmcamcorder_set_extra_preview_bitrate(MMHandleType camcorder, int stream_id, int bitrate);
+int _mmcamcorder_get_extra_preview_bitrate(MMHandleType camcorder, int stream_id, int *bitrate);
#ifdef __cplusplus
}