Is there a resize option on ffmpeg?
 

I'm looking for the option that will let you resize the width of a video during conversion.

In ffmpeg2theora it's
ffmpeg2theora -x ###

that option will let you change the width (or the height), and the program will properly scale the height (or width) automatically.

Is this possible in ffmpeg or do you have to figure out the scale manually?

I was asking myself the same question. Looking at ffmpeg website and manual, I haven't found any resize option that given the height or width will calculate automatically the other measure.

Just use the '-s widthxheight', calculate them using a calculator.

Yes, I was trying to avoid having to use a calculator on that.

I guess ffmpeg isn't advanced enough to do that?

That kind of makes life difficult if you want to resize a group of files?

You can try mencoder, I believe it does have such an option, although it has other issues.