If you want to convert lots and lots of videos at once (like I sometimes do), and don't want to run this command a ton of times, or write a script to convert them - tovid has a nice option. Just use tovid-batch instead like this:$ tovid-batch -dvd -ntsc -infiles *.aviYou can also convert every single (video) file in a folder like this:$ tovid-batch -vcd -ntsc -infiles *.*