webex provides a host of tools to make your life easier. The one you need is the converter for arf to mp4 that vlc or most media players can handle.
Its really simple:
wget http://support.webex.com/supportutilities/nbr2mp4.taruntar and extract a '.sh' file
tar - xvf nbr2mp4.tar
chmod +x ./nbr2mp4.sh
a folder nbr2_mp4 will be created, go in there and run
./nbr2mp4 'abcd.arf'output will be
abcd.mp4or whatever you want to name it.
you can change the FPS - frames per second to whatever you need. I left the default 5 for my case.
As its working, you can preview the file just to be sure it works with vlc in the /tmp directory. a file like:
cd /tmp ls -lrta -rw-r--r-- 1 jgitau jgitau 1355776 2011-05-15 18:50 wbx_nbr_3523.h264will be available. when its done - it takes a while, you'll get an mp4 file that you can play.