What Avisynth Didn’t Find And How To Fix It?

November 18, 2021 By Sean Fry Off

Table of Contents

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In this blog post, we’re going to explore some of the possible causes that might be preventing avisynth from being detected, and then we’ll point out some ways to fix the problem.

Installation Problems

Download AviSynth from http://sourceforge.net/projects/avisynth2/. The downloaded file is a brand new self-extracting / self-installing executable file, not a zipped file like VirtualDub. Once downloaded, open or run them against each other to do most of the installation.

If you are almost unable to get AviSynth to work almost, try the following scenario:

version ()

and open it publicly in Windows Media Player 6.4 (this is the mplayer2.exe file created in C: Program Files Windows Media Player, other versions of WMP may not work). If you see a video in addition to the Avisynth and model copyright post, it works fine.

Empty the AviSynth plugin folder: there may be auto-loaded scripts (avsi) or filtering here)
(see Installing codecs, especially Huffyuv: n will be a random decoder capable of decoding a single video.
If you are using a coding guide (eg GKnot, dvd2svcd, DVX, …) make sure you are using the AviSynth transcription provided with this package: recently found versions may “AviSynth by are not like package. Try asking the package developers for help.
Reinstall AviSynth: There may be a problem with the installation. If you’ve tried playing with the new version, please reinstall the stable version.
If all of the above doesn’t diminish, posting on the Doom Nine forums will help.

Various Difficulty Levels

Scripting with AviSynth is not straightforward, and sometimes AviSynth produces surprisingly strange results. This is a small guide to help you avoid the most common mistakes.

Just Write

If AviSynth gives strange results, review them to simplify your scenario. Try to split your script into as many lines as possible. This will help you identify your problem. For example:

 video = AviSource ("file23.avi"). Convert ToYUY2 (). Cladding (539.8534)return AudioDub (Blur (video, 1.5) .Reduceby2 (). Bilinearrresize (512.384), Wavsource ("file23.wav"). AmplifyDB (4.5)

 AviSource ("file23.avi")ConvertInYUY2 ()Finishing (539, 8534)Blur (1.5)Decrease by 2 ()Bilinear resizing (512, 384)AudioDub (WavSource ("file23.wav"))Amplifier DB (4.5)

Comment out one command (line). This is good for checking the end result of the filter.
Get the required problem position (line) if there is a syntax error in the statements.
Finally, add a return to align some of them in the script. This will create a video at the point in the filter chain. So you can check the input line to which the video is correct by selecting “flip this last”.
Get an idea of the script flow. (Does the crop control primarily affect the video in the above demo?)

Always Check Variables

If you have a filter that gives unexpected results, try to figure it out using simpler parameters. Always check the internal filters on the home page or in the documentation that comes with AviSynth.

Do not doubt Make sure you are using the same type, with the same parameters as described in the documentation. The most common mistake in this case is related to the first parameter of all filters, “clip”. Make sure you understand implicit loading strategies. If you definitely have a “last clip”, the maximum filters will fail with a new “Invalid parameter” error.

“Filter does not return any type of clips” is displayed if your filter performance is last listed in a variable and there is actually no “last clip”. For example:

 Video matches AviSource ("file.avi")audio = WavSource ("file.wav")handset = AudioDub (video, audio)

 AviSource Video ("file = .avi")audio = WavSource ("file.wav")AudioDub (video, audio)

 video uses AviSource ("file.avi")audio = WavSource ("file.wav")handset = AudioDub (video, audio)return = combined

 Video-AviSource ("file.avi")audio = WavSource ("file.wav")Return AudioDub (video, audio)

Test Scripts With Virtualdub

Always use VirtualDub or even VirtualDubMod to test your scripts. This is contradicted by all the features of AviSynth analyzed by her about developers. AviSynth will of course work with most other programs, but if you have bugs in other applications, this is probably not just an AviSynth problem, but the only limitation in the software you normally use.

Color format issues. The lens you are using does not support the color format you are using for the script output.
Problems with the size. Some programs do not support images of all styles and sizes.

Walkthrough Scripting Guide

As mentioned in the “Easy to Write” section, it is always a good idea to be aware of each stage of the script where problems arise.

You can comment out an available filter (s) by placing almost any “#” at the beginning of the net (or before the filter). This way the product (and the rest of the upstream) will be ignored by AviSynth.

You can set “return last”, “return myvariable” anywhere in our script.

At any time in the program, you can add an information filter system () to get information about the logo and sound on the current At the same filter level.

Check Native Home Folder Plugin For Files

Autoloading plugins have traditionally worked well, but you CANNOT introduce them here:

all plugins for creating incompatible versions of AviSynth (e.g. 2.0.x is ineffective).
Special DLL LoadPluginEx.Plugin (from WarpSharp package) that is used to load old 2.0 plugins.
The AviSynth C plugins use the AviSynth C API instead of the persistent interface.
Too much AviSynth (these plugins from many Auto Prescan Load Limit plugins will be removed in v2.57).
No other types of DLL files (usually non-toxic, but recommended).

Remember that ALL AVSI files in your own autoload plugin folder will be automatically included in your script. This is a great feature, so you need your functions without owning them, you can copy and paste them into any script.

Notes. In older versions of AviSynth before (up to 2.0.7), almost all AVS files in the plugin folder were automatically embedded into the script.

This also means that if you copy the examples into scripts, your correct kata isthe plugin log will still be enabled and may generate errors (in older versions!).

In general, any AVSI AVS) (an early file whose commands are far from functional packaging becomes problematic.

All file formats except AVSI and therefore DLL files are ignored, so you can safely leave your information there.

How do I clear the plugins directory? Just start a subfolder (for example, and “hide”) and run all (or some) files in it.

Remember that some files (DirectShowSource.dll, TCPDeliver.dll plugins, ColorRGB.avsi) may well be part of AviSynth (since version 2.56).

Use Conservative Image Sizes

If you have problems with distorted images, use images with conservative dimensions. Use this procedure when size, height, and dimensions are still divisible by seventeen (often referred to as “mod16”). Using plane dimensions that are not divisible by 2 is a problem in many cases and should and should always be avoided.

However, if people find that there is indeed a problem with the definitionPlease file a bug report with the dimensions of the images. Check out how to do this below.

Finally Check The AviSynth FAQ

If you are still having problems (loading scripts in some encoders, color space errors), be sure to check the AviSynth FAQ, especially Q2.4: Problems with Encoder X when reading AVS files? Check sometimes Q1.4: What are the major bugs in the versions? Yours in the FAQ.

Report Bugs / Get Help

We need a lot of information to help you automatically. Usually, if users don’t tell us about it, there’s a good chance that consumers won’t be able to help your business or find a problem.

AviSynth transcript (and beta test date if final SourceForge is not available).
Possible baseline scenario for recovery failure.
EXACTLY the error message you received.
VirtualDub version (Mod).
All VirtualDub information from / file / file info.
Versions of the plugins used.
Codecs and displaysThe sizes of the input material.

Bug headers should be submitted to the SourceForge project page. Be sure to check if malware similar to yours has been submitted previously – it might just be there. Bugs in USB plugins should not be reported, but better here, to the author of this filter.

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