- test different strides using
gst-launch -v videotestsrc ! video/x-raw-yuv,width=320,height=240,format=\(fourcc\)UYVY ! videoscale ! video/x-raw-yuv,width=328,height=240 ! xvimagesink 
gst-launch -v videotestsrc ! video/x-raw-yuv,width=320,height=240,format=\(fourcc\)UYVY ! videoscale ! video/x-raw-yuv,width=324,height=240 ! xvimagesink 
gst-launch -v videotestsrc ! video/x-raw-yuv,width=320,height=240,format=\(fourcc\)UYVY ! videoscale ! video/x-raw-yuv,width=322,height=240 ! xvimagesink 
gst-launch -v videotestsrc ! video/x-raw-yuv,width=320,height=240,format=\(fourcc\)UYVY ! videoscale ! video/x-raw-yuv,width=321,height=240 ! xvimagesink