k4yt3x/video2x

Possible to use 2x scale with realesrgan-plus?

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#1289 opened on Jan 8, 2025

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help wantedstate:Backlogtype:Enhancement

Description

It seems like I cannot reduce the scale from 4 to 2 with realesrgan-plus Model. It is locked at 4.

I can only reduce it to 2 under realesr-animevideov3.

I'm looking to upscale a real-life video, therefore my preference is to use realesrgan-plus instead of realesr-animevideov3.

It takes a bit too long to do 4x upscaling and then downscale to 2x.

Unless realesr-animevideov3 performs just as well for real-life videos, I would prefer to use realesrgan-plus for this upscale job.

Any help or clarification would be greatly appreciated!

Contributor guide

Tech stack
cpppython
Domain
backendmachine learning
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
basic video upscaling knowledgeReal ESRGAN model understanding
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65
Research direction
Investigate the model configuration files for Real ESRGAN plus (likely Python scripts) to understand why the scale is locked at 4. Look into the video2x source code to see how scale is passed to the model. Consider modifying the scale parameter or adding support for 2x scaling. Also evaluate the quality of realesr animevideov3 for real life videos by checking benchmarks or testing.