belcampo wrote: > Steven Miller wrote: >> I have a dvd (ntsc 740x480) that crops to 704x480 (704:480:8:0) which >> changes the DAR from 1.78:1 to 1.74:1. The resulting resolution (on >> playback) ends up being 836x480. Before anyone asks, I have been reading, >> but it's lot to absorb! If I understand correctly, 836x480 maintains the >> 1.74:1 ratio? Another question is, 1.74 indicates a non square pixel, >> doesn't your typical monitor use square pixels? I'm confused as to what's >> happening here. >> >> If I wanted square pixels, would using the 'dsize' filter with a >> resolution >> that is divisible by 16 (scale=-1:-10,dsize=704:400 (this ends up with a >> resolution of 704x400 and a 1.76:1 ratio)) give me square pixels, while >> maintaining a mathematically and visually correct encode? > dsize=704:400 will do this. > Almost all video-sources were/are meant to play on TV, where AFAIK NEVER > square pixels are used, as in your DVD-example. Square pixels will > result in more pixels without ANY benefit. Another point, if square-pixels is needed, and 400 is not a limit somehow, is that reducing vertical pixels reduces percepted quality more then horizontal. So for max square-pixel quality you would use the full 836:480 values > Only if you need to play on devices that don't accept, iPod and others, > non-square pixels it's usefull/necessary to use square-pixels. >> >> >> >> Thanks in advance! >> >> >> >> _______________________________________________ >> MPlayer-users mailing list >> MPlayer-users at mplayerhq.hu >> https://lists.mplayerhq.hu/mailman/listinfo/mplayer-users > > _______________________________________________ > MPlayer-users mailing list > MPlayer-users at mplayerhq.hu > https://lists.mplayerhq.hu/mailman/listinfo/mplayer-users
