I have a more complex version of this second script which uses motion compensation to improve the quality of the denoising, but often find that it is not needed. The amazing thing about this script is that it can sometimes actually recover details that are not apparent in the original video. However, it is an artifact that doesn't call attention to itself, especially since people are accustomed to the peaking circuits used in TVs and video playback equipment which generates similar looking stuff. Its one downside is the "ringing" you get around strong contrast objects, a little like the HQ circuit found in most VHS decks. It does an amazing job of not destroying detail, and doesn't have any of the annoying screen door effect of temporal denoisers or detail-destroying tendencies of most spatial denoisers (including Neat). The second script uses the amazing fft3Dfilter, which is neither a spatial nor a temporal denoiser, but a thing unto itself (it denoises in the frequency domain, more or less). It does leave a little residual "screen door" effect on large flat areas, typical of temporal denoisers, but it is barely perceptible. The first script is amazingly fast if you use the modified AVISynth (for multi-core computers). However, I find the following two scripts provide very useful starting points for de-noising interlaced 29.97 video. I have posted variations on these same scripts before in other threads, so this doesn't represent anything new.Įvery noise reduction situation is different, so there is no universal script that works with everything. I have several hundred AVISynth scripts (for things like scene detection finding individual blank frames to overcome that old Vegas bug removing white dropouts from VHS tape removing dirt from film recovering 24p from 29.97 video that was telecined converting frame rates slow motion creating "real" video from kinescopes and lots of others. Since there are a few AVISynth users reading this, I am posting below the two scripts I most often use on interlaced material.
Avisynth 2.5.8 mt Patch#
Patch fixes incorrect timestamps, redice crashes on stop, reduce memory usage a bit.There is some sort of GUI front-end to AVISynth, but I've never tried it. There should be no crashes due to threading, but if you still experience not 'not enough memory' crashes with MT or correct SetMTMode - rebuild offending plugin with avisynth.h from these sources. try different SetMemoryMax values, the more isn't always the better, i often get good results at 512 or 1024.reduce number of used threads (in SetMTMode or MT).split script into several parts and process them one by one.Multithreaded caching is quite bad what results in eating all memory and crashing after that. added hack to allow C plugin to identify itself as cache.
Avisynth 2.5.8 mt code#
code cleanup (for loop scope conformance.).
Avisynth 2.5.8 mt install#
Note: Not maintained anymore, use Avisynth 2.6 builds instead.īuild is statically linked with runtime library, so you don't need to install any VisualStudio runtime for it to work.
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