dvb_mpeg_es_pic_start_init

@brief Initialize a struct dvb_mpeg_es_pic_start from buffer @ingroup dvb_table

@param buf Buffer @param buflen Length of buffer @param pic_start Pointer to allocated structdvb_mpeg_es_pic_start

@return If buflen too small, return -1, 0 otherwise.

This function copies the length of struct dvb_mpeg_es_pic_start to pic_start and fixes endianness. seq_start has to be allocated with malloc.