bool _mmcamcorder_set_encoded_preview_gop_interval(MMHandleType handle, int gop_interval);
bool _mmcamcorder_set_sound_stream_info(GstElement *element, char *stream_type, int stream_index);
void _mmcamcorder_set_encoder_bitrate(MMCamcorderEncoderType type, int codec, int bitrate, GstElement *element);
bool _mmcamcorder_set_encoded_preview_gop_interval(MMHandleType handle, int gop_interval);
bool _mmcamcorder_set_sound_stream_info(GstElement *element, char *stream_type, int stream_index);
void _mmcamcorder_set_encoder_bitrate(MMCamcorderEncoderType type, int codec, int bitrate, GstElement *element);