How to convert videos to mpg format so that I can make VCD using them.
I'm using Slackware 12.2
Is there any software already installed?
Or I have to install it manually?

VCD? that is a while back I did that but try a neat piece of software called dvdrip, if you want to convert dvd's to vcd. It supports many output formats.

I use k3b for burning discs, but it also has facilities built in for creating VCD's.

these programs and their dependencies are in the repo's. Well in Ubuntu's anyway, but I would say they are in Slack repo's aswell. I am not a real slack user, I have some experience with Zenwalk but I find their package handling system (netpkg?) not as easy to use as synaptic.

question: why VCD? are you actually going to create VCD's that can hold a maximum of 80 minutes on one cd? Most dvd players these days support multiple format playback (like mpg, avi, mp4, mp3, divx, jpeg), just burn any of those files as data dvd on a dvd disc and play it of that.

best of luck,
Ron

The problem is that I don't have DVD player.

fair enough, so if you do not have a dvd player, do you have a vcd player then? or do you just play your files from your computer? if you are playing them from your computer you could basically use any format or am I missing something here?

anyway in dvdrip you can choose to create vcd compliant mpg's, providing you have all dependencies installed.

you say 'videos' but that is a broad term, can you be more specific about your source files?

I've downloaded ffmpeg.
It can convert videos to mpg format which can be used by k3b to burn video CD.