rust-av/Av1an

SC downscale further performance improvements

Open

#968 opened on Apr 27, 2025

View on GitHub
 (2 comments) (3 reactions) (0 assignees)Rust (188 forks)auto 404
enhancementhelp wanted

Repository metrics

Stars
 (1,958 stars)
PR merge metrics
 (PR metrics pending)

Description

A bit of a fuzzy issue since I'm not entirely sure how much improvement we can get. It seems like although SC downscale is providing some performance improvements, it is not nearly as much as one would hope for. The cause is that the downscaling is bottlenecking the scenechange detection.

We should do some investigation to see if there are faster alternatives to Vapoursynth's bicubic that we could use.

Image

Contributor guide

Research direction
Investigate faster alternatives to Vapoursynth's bicubic downscaling in Av1an's scene change detection to reduce bottleneck.
Tech stack
rust
Domain
performance
Issue type
Performance
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
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.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Needs investigation
Prerequisites
Rust
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65