On Mon, Sep 8, 2014, at 12:04 PM, Harold Goranson wrote: > I wish to recode them as modern mp4 to 300p high and as wide as required > to maintain correct aspect ratio, rounded to the nearest 2p. No sound, > but all other qualities the same. You can use the scale filter: -vf scale=300:-2 https://ffmpeg.org/ffmpeg-filters.html#scale