Merging AVIs with different video stream sizes

[PeteRooney]

Good afternoon,

I'm trying to join four AVIs using "Append AVI segment".
The first three have a video stream size of 480X360, but the last one is 476X360, so VirtualDub throws up an error.
Please can anyone tell me how to get around this?
Regards & thanks in advance for your help.

Pete

[neuron2]

Use an Avisynth script. Use AddBorders() on the last clip and then join them with the ++ operator.

[PeteRooney]

Thanks, Neuron - although I've never used it before in my life, I'll give it a go.

[PeteRooney]

If anyone's interested, I opened them all in SUPER and saved them with the same settings:
Output Container = AVI
Output Video Codec = H264/AVC
Output Audio Codec = MP3
Width = 480
Height = 360
Audio Sampling Frequency = 24000

I don't suppose WHAT you use is important as long as it's the same for all the files.

Thanks

Pete