If it does you can put another copy in an appropriate location for it to use.įfdshowDepending on the program you need to load AVS files in you may need to use another application to apply a wrapper, which is basically code that changes what other programs see when opening the script. If you're going to be using a script editor with AviSynth it may also be able to use VirtualDub for previews. It's a good idea to create a VirtualDub folder in the AviSynth folder to store a copy of VirtualDub. Since VirtualDub is both free and small (requires almost no disc space for multiple copies) it's reasonable to keep separate copies for any program that needs one. In addition, it's sometimes useful to see text output from certain filters (displayed over the video) or use the graphic interface for a VirtualDub filter to determine settings for a comparable AviSynth filter. VirtualDub allows you to either play or single step through the video. There are some operations that require you to visually inspect either individual frames or frame sequences. Even if you're not going to use VirtualDub for encoding, it makes an excellent tool for previewing and fine tuning AVS scripts. YV12 for AviSynth) a colorspace conversion both before and after the filter will likely be necessary. Since VirtualDub was originally designed to work in RGB (vs. Since many of these filters are also available natively in AviSynth, some directly ported from VirtualDub, it's best to look for a native alternative first. Although it doesn't provide a GUI like VirtualDub, this is useful for adding those filters between native AviSynth filters. VirtualDub PluginsAviSynth is also capable of using VirtualDub filters to process video. By creating an intermediary lossless (real) AVI file that contains all the editing and filtering done in your script, it can be encoded more quickly. This is particularly useful for lossy encoding of scripts that are CPU intensive, as video encoding is commonly done in two passes, requiring each command in the script to be executed during each pass.
With disc space being a fairly cheap resource, it can also be used to encode to lossless formats to create actual AVI files to read with another program.
It can be used to encode video frameserved by AviSynth using VfW codecs such as DivX and XviD. VirtualDubArguably the first application commonly used to open AVS files was VirtualDub. The column to the left is for AviSynth 2.0 plugins and the one on the right is for AviSynth 2.5.
Note: The download page has 2 columns for download links. The DLL files need to be copied to the AviSynth plugins directory so AviSynth can autoload them. Some plugins also come with source code or example scripts.
Each download is a zip archive which normally includes a DLL file and either text or html files with instructions. In the AviSynth program group on the Start menu there's a Download Plugins link that will open a web page with links to many of them, including the ones used in this guide. If you installed AviSynth to the default location, that will be C:\Program Files\AviSynth 2.5\plugins. Before you can use a plugin you need to download it to your computer and copy 1 or more files to the AviSynth plugins directory. PluginsMany people have written plugins that extend the functionality of AviSynth.
If you're not planning to do any development around AviSynth you shouldn't need them. The Extra Files listed are primarily of use for developing plugins. Associations add options for Windows to automatically open an AviSynth (AVS) file with certain programs automatically, including the ability to open and create AVS files from the Windows Explorer context (right-click) menu. Besides documentation language options, you'll see Select Association and Select Extra Files.
After agreeing to the (GNU Public) license you'll be given some options to install different components. Installing AviSynth is a simple matter of running the installer and considering a few options.