Five step ladders had been set up at the entrance of the court by photographers wanting to get a better view during the day.
Two police cars were stationed outside the courthouse and a few metro officers were milling around.
Pistorius, 27, is accused of murdering his girlfriend Reeva Steenkamp at his Pretoria home in February last year. He faces charges of premeditated murder and contravening the Firearms Control Act in a trial which is expected to last at least three weeks.
The proceedings in the wood-panelled courtroom will be broadcast live on television and radio, with the initial indictment listing 107 witnesses to testify for the State.