Batch Rewrap

Batch Rewrap | 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
Output type: file
Sample coverage: 4
API ready: Yes

Overview

The Batch Rewrap tool allows you to quickly change the container format of multiple audio and video files simultaneously using stream copy. By copying the underlying streams without re-encoding, it changes formats like MKV, MP4, MOV, or WebM instantly while preserving original quality, and packages the output into a single ZIP archive.

When to use

When you need to change the container format of multiple video or audio files without losing quality through re-encoding.
When you want to quickly prepare media files for editing software or players that only support specific containers like MP4 or MOV.
When you have a batch of files to remux and want to download them all at once in a single ZIP archive.

How it works

1Upload up to 30 media files (audio or video) using the file selector.
2Choose your desired output container format, such as MP4, MKV, MOV, or WebM.
3The tool runs a stream copy operation to remux the files without re-encoding the audio or video tracks.
4Download the processed files packaged together in a single ZIP archive.

Use cases

Remuxing MKV recordings from OBS Studio into MP4 format for compatibility with video editors like Adobe Premiere Pro.
Changing MOV files from a camera into MKV containers for better compatibility with home media servers.
Batch converting WebM video clips into MP4 format for easier sharing on social media platforms.

Examples

1. Convert OBS MKV Recordings to MP4

Content Creator

Background

A content creator records gameplay using OBS Studio, which outputs MKV files. However, their video editing software does not natively support MKV files.

Problem

They need to change the container of 10 MKV files to MP4 quickly without losing video quality or wasting time on re-encoding.

How to use

Upload the 10 MKV files, select 'MP4' as the output container, and click process.

Output Container: mp4

Outcome

The tool instantly remuxes the files and provides a ZIP archive containing the 10 MP4 files with identical video and audio quality.

2. Prepare WebM Clips for Presentation

Marketing Specialist

Background

A marketing specialist has downloaded several short WebM video clips from the web to include in a PowerPoint presentation, but PowerPoint does not play WebM files.

Problem

They need to convert these WebM clips to MP4 format quickly so they can embed them in the presentation slides.

How to use

Upload the WebM files, select 'MP4' as the output container, and run the batch process.

FAQ

Does this tool re-encode my video or audio files?

No, it uses stream copy to change the container format without re-encoding, preserving original quality and processing files almost instantly.

What output container formats are supported?

You can choose between MP4, MKV, MOV, and WebM as the output container.

Is there a limit on the number of files I can upload?

Yes, you can upload up to 30 media files at a time, with a maximum total file size limit of 100MB.

Why did I receive a ZIP file instead of individual media files?

The tool packages all remuxed files into a single ZIP archive to make downloading multiple files faster and more convenient.

Can I convert video to audio using this tool?

No, this tool only changes the container format (remuxing) and does not transcode or extract audio tracks from video streams.

Output Container: mp4

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Inputs

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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. Convert OBS MKV Recordings to MP4

2. Prepare WebM Clips for Presentation

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