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Possible incorrect downscale filters behavior #13235

@moonlightes

Description

@moonlightes

Operating System Info

Windows 11

Other OS

No response

OBS Studio Version

32.1.0

OBS Studio Version (Other)

No response

OBS Studio Log URL

https://obsproject.com/logs/4YvMCsK1MOi6GfCU

OBS Studio Crash Log URL

No response

Expected Behavior

Text that remains legible at lower resolutions

Current Behavior

Strange pixelation in the image, severe text distortion

Steps to Reproduce

  1. Set the output (scaled) resolution to a value lower than the current one. For example, reduce 1440p to 1080p
  2. Use a bicubic or Lanczos downscale filter, and watch the recording or stream.
Image Image Image

...

Anything else we should know?

Bilinear and Area filters don't distort the text and work as intended.
This issue had already been resolved here, but subsequent changes brought the problem back:
https://obsproject.com/forum/threads/is-lancsoz-really-the-best-filter.13559/

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