What is the proper way to transcode videos that have a non-square PAR so that they display properly on the tivo? I have some old movies that are filmed in a 2.35:1 aspect ratio, but the DVD they are on was originally created for a 4:3 display. I'd like to transcode them so that they are properly formatted to play on my widescreen TV through my HD tivo without having to use zoom. They should be letter-boxed - I'm aware of that - but they should fill the screen from left edge to right edge. Here is what I've done so far: The DVD aspect aspect ratio is 720/480. Since 720 represents the full width of the movie I divided this by 2.35 to get the height of the movie between the letterbox border - this came out to 306 meaning the top and bottom letterbox borders total 174. Since half of this is 87, I chose 88 to keep it a multiple of 4. I used ffmpeg to crop to 720x306, and then to scale to 1280x544 (the same 2.35:1 ratio) and then pad out to 1280x720. Here are my ffmpeg parameters to do this: -vf "crop=720:306:0:88, scale=1280:544, pad=1280:720:0:88" I verified the results with mediainfo. However I saw there that even though the dimensions were 1280x720, it showed the DAR of 1.58. (1280:720 * 8:9 = 1.58:1) When I tried to play this on the tivo, indeed I got sidebars on the screen - this is not at all what I wanted. I tried setting the aspect parameter to 16:9, but this resulted in a final DAR of 2.2:1 (I can't figure this one out) and the video was over-wide and squished top to bottom. Once I discovered that the PAR of the original file was 8:9, I did some math resulting in a changed scaling factor - instead of 1280x720, I changed the target dimension to 1440x720 which when multiplied by the PAR of 8:9 results in a DAR on 16:9. Voila - mediainfo showed the desired results - however the tivo still had side bars. I don't know what to do next. Is there someway to transcode so that the resulting pixels are square?