Use widescreen mode for calculations with 1440x1080 stretched to 1920x1080. For "anamorphic" HD at 1440x1080 it is assumed that 4:3 is encoded without black bars, if you select fullscreen mode. This way the PAR for both fullscreen and widescreen video is 1:1.
For example, if you have a source where a widescreen movie was encoded as letterboxed fullscreen, you'll have to choose full screen as the source AR.Ībout HD: It is assumed that, in the case of full HD, 4:3 is encoded pillarboxed. Since the vast majority of professionally mastered SD material should conform to ITU-R B.601, this is the way it's supposed to be done, using correct ITU-R B.601 PAR values.Īlso note, that the correct source AR is not necessarily the AR of the movie. This means that without transforms (like cropping to the active picture region), you won't get a DAR equal to the source AR. The source AR is given with respect to the active picture region. The target size for pad must be greater than the former actual video size.
Pad transforms pad the actual video resolution to the specified size. The target size for crop must be lower than former actual video size. Crop transforms crop the actual video resolution to the specified size. Scale transforms scale the actual video resolution to the specified size.
If 9Mbps doesn't seem like a lot of bandwidth, consider this: most TV stations that broadcast an over the air signal (OTA) have only a 17Mbps allowance, and they tend to. If you read and understood the linked page, know what you are doing, and think you found a bug in the calculations, please report it to: ar-calc a t ps - auxw d o t de Calculate An anamorphic DVD should get you very good results (720x480 NTSC 16:9AR), as long as you use enough bitrate (video peak 9.8Mbps, total peak 10.08Mbps) and do a two-pass encode. Well, basically this is simply a calculator used to determine the correct AR data for certain types of input video under certain transformations. Not to speak of all the little details that are not quite what one'd think. HE 1080 59.94i: 1440x1080, Average 5Mbps (VBR) PM 720 59.94p: 1280x720, Average 8Mbps (VBR) SA 480 59.94i: 720x480 (SIDE CROP/SQUEEZE), Average 9Mbps (VBR) Recording / Playback Mode Recording / Playback Mode 35 mm Film Camera Equivalent (Motion Image/Still Image) 29. There's the Sample Aspect Ratio (SAR), also called Pixel Aspect Ratio (PAR), which specifies the dimensions of each pixel, and there is the Display Aspect Ratio, which specifies the aspect ratio of the whole picture. Aspect Ratio Calculator Aspect Ratio CalculatorĪspect ratios can be a confusing business.