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"What is the best 4k upscaler shader to improve the quality of non-anime movies?"

Anime4K is an open-source, high-quality, real-time anime upscaling/denoising algorithm that can be implemented in any programming language, but it's not optimal for downscaled anime or non-anime content.

FSRCNNX is a 4K upscaler shader suitable for more general content, including non-anime movies, and can be used in combination with SSSR for optimal results.

SSSR (Super-Resolution using Structural Similarity) is a 4K upscaler shader that performs well for 720p and higher resolutions, especially when combined with FSRCNNX.

waifu2x, SRGAN, and Real-ESRGAN are other upscalers mentioned, but not specifically recommended for non-anime movies.

The effectiveness of Anime4K for upscaling purposes is subjective and may vary depending on individual preferences and display devices.

Anime4KUpscaleCNNULx2glsl is a high-end GPU-intensive shader that provides accurate upscaling but may not be suitable for lower-end hardware.

Anime4KUpscaleDTDx2glsl is an alternative shader for 1080p media that provides higher perceptual quality at a lower computational cost.

nnedi3 is a safe and versatile upscaler that can be used in most cases without side effects, providing some benefit when used correctly.

Potplayer and Madshi Video Renderer can enhance video quality as high as the GPU can handle, but may require specific settings and configurations.

The Anime4K algorithm is designed for native 1080p anime encoded with H.264, H.265, or VC-1, and may not perform well on downscaled or low-resolution content.

Real-time upscaling requires significant computational power, making high-end GPUs necessary for smooth performance.

Combining multiple upscalers or shaders can result in better performance and quality, but may also increase computational requirements.

The choice of upscaler or shader depends on the specific content, display device, and hardware capabilities, making experimentation and optimization crucial.

Some upscalers, like Anime4K, can be used in various media players, including MPV and Plex, with custom configurations and settings.

The effectiveness of 4K upscalers can be highly dependent on the quality of the original content, and may not always produce optimal results for low-quality or degraded sources.

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