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AV1 / SVT-AV1 Preset Quality & Bitrate Tuner

· Last updated：2026-07-31

Project SVT-AV1 output size, bitrate, and approximate VMAF for preset/CRF/resolution, and compare against libaom and libx265

Details

What this tool helps you do

A planning tool for AV1 encoding — model the tradeoff curves BEFORE you encode. Anchored on published benchmarks (NETINT, SPIE, Streaming Learning Center, SVT-AV1 docs). Real output is highly content-dependent; treat all numbers as order-of-magnitude estimates.

Execution

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Samples

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Written by the Elysia Tools team

Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Category
Media
Input types
select, number, checkbox
Output type
html
Sample coverage
4
API ready
Yes

Overview

AV1 / SVT-AV1 Preset Quality & Bitrate Tuner estimates output bitrate, file size, and approximate VMAF from resolution, framerate, CRF, preset, and clip duration, with optional comparisons against libaom and libx265. Results are planning estimates and depend strongly on video content.

When to use

  • Estimate the bitrate and file size of an SVT-AV1 encode before starting a long encode.
  • Compare quality and compression tradeoffs for different CRF, preset, resolution, and framerate settings.
  • Evaluate an AV1 configuration against approximate libaom and libx265 results.

How it works

  1. 1Select the target resolution and enter the clip framerate and duration.
  2. 2Set the CRF/QP value and SVT-AV1 preset within their supported ranges.
  3. 3The tuner projects approximate bitrate, file size, and VMAF for the selected configuration.
  4. 4Enable codec comparison to view the projected SVT-AV1 result alongside libaom and libx265.

Use cases

  • Plan storage requirements for video-on-demand libraries before encoding.
  • Choose a practical quality and speed balance for 1080p or 4K delivery.
  • Compare codec projections when evaluating an AV1 migration or encoding workflow.

Examples

1. 1080p24 balanced VOD estimate

Video platform engineer

Background

A video platform needs a preliminary size and quality estimate for a 10-minute Full HD clip.

Problem

Select a balanced SVT-AV1 configuration before committing encoding resources.

How to use

Set resolution to 1080p, framerate to 24 fps, CRF to 30, preset to 6, duration to 600 seconds, and enable codec comparison.

1080p, 24 fps, CRF 30, preset 6, 600 seconds, compare enabled

Outcome

The tool projects approximately 1.75 Mbps, about 130 MB for 10 minutes, and an approximate VMAF of 90, with comparison estimates for libaom and libx265.

2. 4K60 archival quality estimate

Video archivist

Background

An archivist is evaluating a high-quality 4K version of a 10-minute 60 fps recording.

Problem

Understand the expected storage impact of a higher-quality, slower SVT-AV1 encode.

How to use

Set resolution to 2160p, framerate to 60 fps, CRF to 23, preset to 4, duration to 600 seconds, and enable codec comparison.

FAQ

What does this tool estimate?

It estimates SVT-AV1 bitrate, output size, and approximate VMAF for the selected settings.

Which inputs affect the projection?

Resolution, framerate, CRF/QP, preset, and clip duration affect the projection.

What does a lower CRF value generally indicate?

A lower CRF value generally targets higher quality and may produce a larger file.

Can I compare AV1 with other codecs?

Yes. Enable codec comparison to compare SVT-AV1 with libaom and libx265.

Are the results exact encoding measurements?

No. They are order-of-magnitude estimates because actual results vary with video content.

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Outcome

The tool provides a large-file, high-quality projection and approximate VMAF comparison for SVT-AV1, libaom, and libx265.