1 - test different strides using

     2 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 

     3 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 

     4 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 

     5 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