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Modern digital video usually does not have that kind of bars unless it is letter- or pillar-boxed. They are not necessarily straight vertical and horizontal bars so it is better to see where they actually are. Older transfers have often black bars all around that are relics of the scanning. Why now and not before? It basically depends on the source material. I have included most options even if I use on some the default so that I could have left them out. The AviSynth ScriptTurning on multithreading for the script must come as the first line:Īfter loading your video you may do the pre-processing (and you'll speed up multithreading): Since sharpening the image may also increase some unwanted grain, I'll apply a denoiser, the VagueDenoiser. Nnedi3 and WarpSharp are doing most of the work, though the sharpening filter is optional, both in its use and in its choice. Next are the necessary filters that are not included in AviSynth:ĭeDot and Checkmate are optional for the pre-processing in case you have older video transfers that may reduce rainbows, dots and dotcrawl.
#VIRTUALDUB WARPSHARP INSTALL#
To install the MT package (adding multithreading capabilities to AviSynth) follow the instruction that come with the archive (in case you use the stable version of AviSynth you'll need the proper MT package). If either version does not work or crash, use the stable releases 2.5.8 and 1.9.11, respectively. List of the Tools AviSynth 2.6.0 (still in alpha release) NNEDI will do the major upscaling before cropping, sharpening, and resizing it. The AviSynth script will load the source video, do some pre-processing before converting it into the YV12 color space needed by most AviSynth filters like NNEDI or WarpSharp. To reduce the filesize a bit, I will use Lagarith for lossless video compression. But reduce the workload on the computer VirtualDub can be used to actually create a real AVI file before continuing processing the video. It is inasmuch a frameserver that any program able to open AviSynth scripts will actually see an uncompressed AVI file. It does not have a GUI but is controlled by scripts written in the AviSynth scripting language. AviSynth is a frameserver program acting as a non-linear video editor. To give you the basic idea, here's an outline of my approach. But NNEDI3 has a special function that does just the upscaling of the image and that's what I'm going to use.
#VIRTUALDUB WARPSHARP SERIES#
Robert Martens' SimpleSlugUpscale and tritical's series of edge directed interpolation filters were created for deinterlacing and upscaling. Obviously not deinterlacing, that is reverting interlaced video to progressive scan, is required on this sort of material. Progressive scan is today often used on Blu-ray or PAL DVD video. Upscaling a Progressive VideoHere is my proposed solution for a video with progressive scan. Upscaling in Avisynth – Comparison of Resizers NNEDI apparently stands for something like neural network edge directed interpolation. Winner in his little test was tritical's NNEDI filter. Meanwhile Jean Brünn has made a comparison of AviSynth resizers that are commonly used for upscaling videos. Robert Martens has written a whole guide, providing the necessary tools and a his own autoloaded AviSynth script SimpleSlugUpscale but it does little more than deinterlacing and resizing the image. Proposed Web SolutionsThere are few solution proposed on the internet. But you may think it interesting if you are watching low resolution video on a high definition screen. In short, the increase in quality generally (as in: for most people) does not justify the increase in file size and the additional time spent on preparing and doing the encoding. Yet there is a downside: a higher resolution means more pixels per image that may or may not increase the bitrate required for optimal compression. Thus (proper) upscaling will increase the image quality on a high-definition screen while not reasonably change its quality on a standard-definition screen. Unless a video has the exact resolution defined as standard for a given output device, the video will always be rescaled. Upscaling a video to be encoded will give control over the automated upscaling done by the output devices (television sets or computer monitors). Any video sequence will be upscaled for display on a screen with higher resolution than the video itself. Upscaling Video: What Is ItUpscaling is the technique to increase the image resolution without recourse to an actual source of higher definition.