If you’re looking for an advanced video editor, then this is not the software you want. But all the advice here is helpful in any case. Avidemuxis a free video editing softwaredesigned for simple cutting, filtering, and encoding tasks. IMHO we should use these tools including vdub in the ways we find most useful and this might differ from person to person (especially since we are all doing different things etc). As somebody said, with an AVS file all frames are keyframes and this must be very useful. Avidemux is a free video editor designed for simple cutting, filtering and encoding tasks. A modern, simple to use, constantly evolving and hella fast MEDIA CUTTER + JOINER w/ frame-accurate SmartCut technology + Qt5, libmpv, FFmpeg and MediaInfo powering the backend. The result was that there was no perceived quality loss in doing this, compared to encoding the whole recording. The only case when I 'split' the avisynth file up through virtualdub (video only) was to extract a part of a recording for use to create a fan music video as an experiment to see whether I could do it with just open source tools. Ok so I could read it directly in Virtualdub but since I want to produce an XviD encoded file this is not as useful to me (basically my XviD encodes are always: DVD2AVI / avisynth for deinterlacing and smoothing using Convolution3d because some transmissions really need it / virtualdub) - I don't want an MPEG2 (or uncompressed) clip basically. My source is always a satellite recording which is in MPEG2. What i wanted to say was that you will end up with an uncompressed avi file if you use avisynth + vdub + direct stream copy and so it would not be useful for only cutting the file.

Avidemux cutting video