AVI to MP4 Converter

AVI to MP4 Converter | Online Free Tool | Elysia Tools

Tool usage guide

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

Key facts

Category: Media
Input types: file, select, number
Output type: file
Sample coverage: 4
API ready: Yes

Overview

The AVI to MP4 Converter allows you to transcode AVI video files into the highly compatible MP4 format. By selecting custom video and audio codecs like H.264 and AAC, or copying streams directly without re-encoding, you can optimize your videos for playback on modern web browsers, mobile devices, and media players.

When to use

When you need to play legacy AVI videos on mobile devices or web browsers that do not natively support the AVI container.
When you want to compress large AVI files into a more efficient MP4 format using H.264 or H.265 codecs.
When you need to prepare video files for upload to social media platforms or video hosting sites that require MP4.

How it works

1Upload your AVI video file (up to 100MB) into the converter.
2Select your preferred video and audio codecs, or choose 'Copy' to change the container without re-encoding.
3Adjust the CRF quality value between 18 and 28 if you are re-encoding the video.
4Click convert to process the file and download the optimized MP4 video.

Use cases

Converting old family videos recorded in AVI format to MP4 for easy sharing on messaging apps.
Preparing raw AVI camera footage for editing in software that prefers MP4 containers.
Transcoding AVI files with H.265 compression to save storage space on local drives.

Examples

1. Convert Legacy Camcorder Footage for Web Sharing

Family Archivist

Background

An archivist has old home videos saved in AVI format from an early 2000s digital camcorder.

Problem

The AVI files cannot be played directly on iPhones or shared via email.

How to use

Upload the AVI file, select 'H.264' for the video codec, 'AAC' for the audio codec, and set the CRF quality to 22.

Video Codec: H.264, Audio Codec: AAC, CRF Quality: 22

Outcome

An MP4 video file that plays instantly on iOS devices and is ready for cloud sharing.

2. Fast Container Swap Without Re-encoding

Video Editor

Background

A video editor has an AVI file containing H.264 video and AAC audio, but their editing software only accepts MP4 containers.

Problem

Re-encoding the video would waste time and degrade quality unnecessarily.

How to use

Upload the AVI file, set both the Video Codec and Audio Codec options to 'Copy (No Re-encoding)'.

FAQ

Can I convert AVI to MP4 without losing quality?

Yes, by setting both the video and audio codecs to 'Copy', the tool changes the container from AVI to MP4 without re-encoding the streams.

What is the maximum file size supported?

The converter supports AVI video files up to 100MB in size.

Which video codec should I choose for maximum compatibility?

The H.264 (libx264) video codec combined with the AAC audio codec is recommended for the best compatibility across modern devices.

What does the CRF quality setting do?

Constant Rate Factor (CRF) controls the output quality during re-encoding; lower values (like 18) yield higher quality but larger files, while higher values (like 28) produce smaller files.

Will this tool work on mobile browsers?

Yes, this is a web-based tool that works directly in any modern mobile or desktop browser.

Video Codec: copy, Audio Codec: copy

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Inputs

Result

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

Key facts

Overview

When to use

How it works

Use cases

Examples

1. Convert Legacy Camcorder Footage for Web Sharing

2. Fast Container Swap Without Re-encoding

FAQ

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