Splicing avi's

[alexh110]

I'm sure this is a really easy question, but what's the easiest way to join two or more avi files together using AviSynth and/or Virtual Dub?

They're all at the same resolution, and have identical codec's.

[Gavino]

I was tempted to ignore this as it is such an elementary question. However, there is an important point that is perhaps less obvious to newbies.

It is trivial to do in Avisynth using one of the Splice (http://avisynth.org/mediawiki/Splice) functions (or simply the + or ++ operator), but you need to be aware that when using Avisynth, the output must always be re-encoded (since Avisynth delivers uncompressed video to its client application).

So it's better to use VirtualDub directly here. Load in the second and subsequent files using "Append avi segment", set both Video and Audio to "Direct stream copy" and save the result.