-\textit{DAR}= Display Aspect Ratio
-
-\textit{PAR}= Pixel Aspect Ratio (1 or 1:1 is square)
-
-\textit{SAR}= Storage Aspect Ratio (i.e media file aspect ratio)
-
-In practice, there can be a problem with anamorphic format rendering as desired because it does
-not use square pixels. So, for example, FFV1 format in the mkv container will ignore the DAR
-(Display Aspect Ratio). You can check if your media is anamorphic format using the \textit{Mediainfo}
-program. If the Width/Height is 720/576 (=1.25) and DAR is 16/9 (=1.777) then you have non-square
-pixels. SAR (Storage Aspect Ratio) is different from DAR and you have to use a workaround as
-described at the "Cinelerra for Grandma" site by Raffaella Traniello:
-{\small\url{http://www.g-raffa.eu/Cinelerra/HOWTO/anamorphic.html}} .
+\CGG{} allows you to vary the input and output aspect ratio in the ways indicated in the previous section: by varying the pixels of the sides (Width/Height) or by setting a multiplication coefficient (W/H Ratio; in this example: placing $H Ratio = 816 : 1080 = 0.7556$) which performs the calculation automatically. If you set \textit{W Ratio} and \textit{H Ratio} at the same time with the same values, they work as multipliers and you get a resizing of the canvas, without altering the initial aspect ratio. If you change them to two different values or change only one of the two parameters, leaving the other at 1, you get an anamorphic video, with the pixels no longer being square (1:1) but becoming rectangular, deforming the image. To avoid anamorphosis, the \texttt{Display Aspect ratio} must also be adjusted at the same time, for example, with the Auto option. \textit{Anamorphic} format is a complex field that is discussed in the Raffaella Traniello's guide: {\small \url{http://www.g-raffa.eu/Cinelerra/HOWTO/anamorphic.html}}.