iPod Conversion: Joining two sequential avis into one mp4?

[Agent86]

Is there any language that can do this? I have two avis and want to use Avisynth to create just one output mp4 after conversion.

Thanks in advance.

[Boulder]

a=AVISource("clip1.avi")
b=AVISource("clip2.avi")
a++b

[foxyshadis]

Are the avis already in an ipod-ready format? If so, you might be able to use yamb+mp4box to just merge them without having to re-encode, much much faster. If not, ignore.