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Using the Avisynth File for Footage
At this point you should have a working AVIsynth file that contains your video footage. You'll need to decide what to do with it in terms of editing.
1) Create avi files to edit with (Recommended)
This method involves either making clips or encoding entire episodes/movies with a lossless codec. The resulting Avi files are fast and easy to work with, and this is the method that I use and recommend. The major downside of this method is the amount of space that the losslessly encoded Avi files will take up. If you plan to encode entire episodes or movies, you will need a LOT of space. Estimate about 5gb per 25 minute episode.
Making clips can be useful for those who find it unwieldy to edit with full episodes and full dvds. It can also give you a good pool of footage to work from and saves searching around for footage. Making clips can also significantly help with the disk space problems. Instead of saving entire episodes, you may only need about 5 minutes of footage from a certain episode, and 1 minute of footage from another episode, and so on. Depending on how many clips you make and how long they are, it is quite possible to fit all of the footage that you will need into only a few gigabytes of space.
This is a tried and tested method and works well in pretty
much any program you care to consider.
2) Edit directly with the AviSynth files.This method is mainly used to be recommended if you are working with Adobe Premiere, since you can import your AviSynth files directly into it (via the plugin included in the AMVApp). However as of Premiere Pro CS5, the plugin no longer works! This method is usable with other programs as well, but you will have to go through an extra step, which can complicate things a little further.
The main benefit of this method is that it allows you to have access to entire episodes without using the huge amounts of disk space that are required by method 1. This flexibility comes at a cost though--AviSynth files will be slower than the clips you will have in method 1. The more filters you apply to your scripts (IVTC and deinterlacing included), the slower they will run. If you have a fairly fast computer this isn't a bad method, and is definately worth consideration.
Another downside of using this method is that it is considerably less stable than method 1, and can use SIGNIFICANT amounts of memory, if you are editing multiple avs scripts.
3) Proxy Files (the "bait-and-switch" method).First off, this technique may not work all that well with some editing programs. Even if this works alright in your editing program, I still don't recommend it because there is a lot of potential to simply screw things up after you have finished editing your video. A few years ago when hard drives were small and processors were slow, this was a viable option for those who simply couldn't work with methods 1 or 2. In this day and age though, this method has simply lost many of its advantages.
The basic idea behind this method is to create small and low-quality avi files which will be fast to edit with. After you have finished editing your video with these low-quality files, you can swap them out with the full-quality avisynth files and then export your video. On paper, this would appear to give you the best of both worlds--fast files for editing without using a lot of disk space--but in reality this method can be somewhat finicky and difficult to work with.
If you take the time to make sure that this will work perfectly before you begin editing your video, then I suppose it's an alright method, particularly if you are still working from old hardware.
OK, so do you know which method you want to use?