I have a Xvid encoded copy of a movie I own. The original aspect ratio was [bold]2.40:1[/bold] with the standard 720x480 resolution. The Xvid video has a resolution of 640x256 and the aspect ratio says [bold]2.50:1[/bold]. Does this mean that a little bit of the movie is being chopped off? Could someone please explain? Thanks.
It simply means you'll have to add black bars in the video, to see fully the movie screen. For example, load that AVI with VirtualDub. Add the 'resize' filter (Video___Filters__Add) and multiply the video bt 720/640 = 1,125 = 9/8. Therefore choose: - new width = 720 (9/8*640; it will make 720 by construction) - new heigth = 288 (9/8*256) as 'filter mode' you can choose a 'precise bicubic', but I choose 'Lanczos3'. Please note that the aspect ratio is not alterated (just a 'by 9/8 multiplication'). Then check the box 'expand frame and litterbox image' and set - Frame width = 720 - Frame heigth = 480 Look at the output screen (right) in VirtualDub. Can you see it? The movie is not chopped off. Well, a little screen (30 pixels E and W) will be lost, but this is a problem of the 4:3 dislay with respect to a 16:9 display...
FILE > Save as AVI. Also set the sound to direct stream copy and the vdieo i think you will have to set to full procesing mode and set up xvid again. but correct me if im wrong.
Could mean that pixels were cropped or it was badly resized. I wouldn't recommend using VDub filters. It slows down encoding and results in lower quality. Speaking of lower quality though, I wouldn't recommend re-encoding from your XviD source. Use the original source and encode again. Keep in mind though that the resolution should be mod16. So basically you have a toss up between keeping it mod16, cropping pixels, having a AR error or keeping black pixels. Best is not to resize at all and set the PAR appropriatly so that it displays the correct AR on playback (much the same as the original DVD). Still usually means cropping pixels to keep it mod16.
