after experimenting with the file that you sent me, i4get75, the method that appears to work and is free is this...
download 'mplayer 1.0rc1 windows' from this site http://www.mplayerhq...u/design7/dload.html
extract the contents of the download to somewhere you can easily get to using a DOS command prompt, i.e. extract to a folder called 'mplayer' that is on the root of your C: drive (make sure that this folder 'mplayer' has the contents of the archive directly inside it and not yet another folder called 'mplayer' that then has the contents inside it - this is important for using the DOS commands.)
put the mjpg file you wish to convert into this 'mplayer' folder, i.e. so that the file is with all the other files that were extracted.
when you've done the above...
open a DOS command window - do this by opening the 'run' window in your 'start' menu.
in the 'run' window type cmd and press enter
a DOS window will appear
then hit enter
type cd mplayer
then hit enter
type mencoder.exe -ovc copy -ofps 12 yourfilename.mjpg -o out.avi
and hit enter
this will convert the mjpg file named 'yourfilename.mjpg' to a file named 'out.avi' so you need to change the name of the input file name part in the command prompt above.
this information came from the 'digital video forums' http://forum.digital...p?t=64584&page=2
if this doesn't work i'm unfortunately not going to help much more as it worked perfectly here.
this method relies that you have the correct dos paths and directories in the right place so if you don't understand how to navigate around windows you'll not get very far.