MP4 to AVI Converter

MP4 to AVI 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 MP4 to AVI Converter allows you to easily transcode MP4 video files into the AVI container format while preserving original video and audio quality. With support for direct stream copying to avoid re-encoding, as well as transcoding using codecs like H.264, H.265, MPEG-4, MP3, and AAC, this tool provides flexible options for legacy media player compatibility and custom compression.

When to use

When you need to play MP4 videos on older hardware media players or legacy software that only supports the AVI container.
When you want to change the video or audio codec of an MP4 file, such as transcoding to MPEG-4 or MP3 audio, while wrapping it in an AVI container.
When you want to quickly remux an MP4 file to AVI without re-encoding by copying the video and audio streams directly.

How it works

1Upload your MP4 video file (up to 100MB) into the converter.
2Select your desired video and audio codecs, or choose 'Copy' to preserve the original streams 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 resulting AVI video.

Use cases

Preparing video files for playback on legacy DVD players or car entertainment systems that only read AVI files.
Transcoding modern H.265 MP4 videos into standard MPEG-4/MP3 AVI files for older editing software.
Remuxing MP4 containers to AVI containers instantly using the stream copy option to avoid quality degradation.

Examples

1. Remuxing MP4 to AVI for Legacy Car Player

Car Enthusiast

Background

A user has a collection of MP4 videos that they want to play on an older dashboard media player in their car, which only supports AVI containers.

Problem

The player rejects MP4 files, but the user wants to avoid losing video quality through re-encoding.

How to use

Upload the MP4 file, set both the Video Codec and Audio Codec options to 'Copy (No Re-encoding)', and run the converter.

Video Codec: copy, Audio Codec: copy

Outcome

The video container is changed to AVI in seconds without any re-encoding, allowing it to play perfectly on the car dashboard.

2. Transcoding H.265 MP4 to DivX AVI for Vintage PC

Retro Tech Hobbyist

Background

A hobbyist needs to play a modern H.265 MP4 video on an old Windows XP computer that only has DivX/MS MPEG-4 codecs installed.

Problem

The vintage PC lacks the hardware and software decoders to play modern H.265 MP4 files.

How to use

Upload the MP4 file, select 'MS MPEG-4 V3 (DivX)' as the video codec, select 'MP3' as the audio codec, set the CRF quality to 20, and convert.

FAQ

Can I convert MP4 to AVI without losing quality?

Yes, by setting both the video and audio codecs to 'Copy (No Re-encoding)', the streams are transferred directly without quality loss.

What is the maximum file size supported?

The tool supports MP4 video files up to 100 MB in size.

Which video codecs can I choose for the AVI file?

You can choose Copy, H.264, H.265/HEVC, MPEG-4, MS MPEG-4 V2, or MS MPEG-4 V3 (DivX).

What does the CRF Quality setting do?

It controls the visual quality during re-encoding; lower values (down to 18) produce higher quality but larger files.

Can I convert audio to MP3 inside the AVI container?

Yes, select MP3 from the audio codec dropdown options before starting the conversion.

Video Codec: msmpeg4v3, Audio Codec: mp3, CRF Quality: 20

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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. Remuxing MP4 to AVI for Legacy Car Player

2. Transcoding H.265 MP4 to DivX AVI for Vintage PC

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