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#Hdtv aspect ratio calculator movie#
but in reality, the movie aspect ratio quoted on the back of the DVD cover can often be quite a bit out. so it's five vertical pixels out.Īdmittedly five vertical pixels is not very much at all. However, the nearest "mod16" pixel calculation is 720x368. "should" mathematically contain an image of 720x363 (give or take a few vertical) pixels. When cropping the black mattes away, it's not always possible to obtain the "theatrical" aspect ratio, within the confines of a "mod16" encode.įor example, an anamorphic (16:9) widescreen NTSC DVD with a 2.35:1 movie on it. So the point of your tool is to allow the user to find a par that is better fitting the movie than the standard dvd 4:3/16:9 pal/ntsc one?Īs you know, a DVD source contains black mattes as well as the "all important" image. Who was able to turn my design concept into a working reality. NET Framework 2.0 in order to run.Īnyway. Second: Enter your "ARS value" into the "Custom" boxes (as shown below).Īt the time of writing both applications require Micro$oft's. You will need to use another application called MPEG4 Modifierįirst: Feed (drag and drop) your MPEG-4 source into MPEG4 Modifier. Third: You enter both these values into the "ARS Calculator" and then press the "Calculate" button to obtain the required "Aspect Ratio Signalling (ARS) value. This can often be found on the back of the DVD cover, or on Amazon. Known as the, "Movie Aspect Ratio" (MAR). Second: You need to determine the actual aspect ratio of the movie. to this say: -įirst: You need to determine the "Pixel Frame Size (PFS) of your MPEG-4 encode - Preferably without the black mattes. The ARS calculator will enable you to work out the required "Aspect Ratio Signalling" (ARS) value needed to correct the shape. I have conceived the first version of my ARS Calculator (see link below).Įssentially, if you have an encode that's displayed at the wrong shape (see the port-hole).
#Hdtv aspect ratio calculator how to#
And how to correct the aspect ratio of their existing "square pixel" encodes. In response to all those people who have enquired about how to calculate the required, aspect ratio signalling (aka: PAR, SAR and DAR) values for their "anamorphic" encodes.