[Gimp-user] mpeg with GIMP or GAP

[Marc Nicolardot <marc nicolardot yahoo fr>]

Good afternoon,
I woul'd like to convert an animation built with GAP and GIMP (a folder with 500 frames (i.e. 500 numbered 
.xcf files)) to an MPEG file with a .wav file (music). I have read in O. Lecarme and K. Delvare french book 
it shoul'd be possible, but I don't find the video/Master Videoencoder in the video menu (page 197 in the 
book). What coul'd be the problem ? 
Note : the animation does work with the Playback function in the video menu.
Thank you very much if you can help me.
Marc Nicolardot