10 1000 60 1 10 False dialog False vertical 2 False end gtk-cancel True True True True False True 0 gtk-ok True True True True False True 1 False True end 0 True False vertical True False <b>Preview video</b> Devede will create a preview with the selected parameters, so you will be able to check the video quality, audio sync and so on. True center True True True 0 True False True False Preview length: False True 0 True True length True True 1 False True 1 True True 1 button1 button2