[FFmpeg-user] Shrinking videos to constant height

[Harold Goranson]

I have many videos in various formats and sizes on a Mac.

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.

Sorry if this is obvious. I can't even figure out the basic batch command without the mod2 width.

TIA