> > > If that can't work, I am trying to figure out how to not distort the aspect > ratio of the source video. If my source video is 16:9, and I encode it to a > preset that is 4:3, I want it to letterbox the video (place black bars on > top and bottom). I don't want it to stretch the video to the edges so that > everyone looks twice as tall. >
i know nothing about winff, but you can scale maintaining aspect ratio specifying only one dimension with the scale filter in libavfilter. This is not integrated into the main repo yet, so you would need to build your own ffmpeg (or find a win32 binary) with libavfilter support to get that to work. i would guess the reason that main ffmpeg doesn't do what you want is that not all pixels are square - therefore picture aspect ratio is not the same as width/height. That's why libav* maintain aspect ratio and frame size quite separately. jon _______________________________________________ libav-user mailing list [email protected] https://lists.mplayerhq.hu/mailman/listinfo/libav-user
