To change the display aspect ratio to 16:9, specify one of the following:
setdar=dar=1.77777 setdar=dar=16/9
To change the sample aspect ratio to 10:11, specify:
setsar=sar=10/11
To set a display aspect ratio of 16:9, and specify a maximum integer value of 1000 in the aspect ratio reduction, use the command:
setdar=ratio=16/9:max=1000