MP4 + Alpha Converter

Convert videos with alpha channel to MP4/h264, keeping the background transparent, just with one click.

Learn about license types
  $29.99
  • Free Trial
Description

MP4 + Alpha Converter

Convert videos and image sequences with Alpha Channel directly to lightweight MP4/h264 files while keeping transparent backgrounds.

Turn Gigabytes into Megabytes with a single click and optimize storage, cloud workflows and archived projects.

1 Click Workflow Transparent Background Support Massive File Size Reduction AE Native MP4 Renderer

Why use it?

GB to MB with 1 Click
Panel Usage

Perfect for productions with intense cloud traffic, archived projects, shared libraries and storage-heavy workflows.

The script automatically converts footage with alpha into optimized MP4 pairs and rebuilds your compositions automatically.

Keep the same visual result while dramatically reducing project storage usage.

Features

Simple to use Just one click simple interface.
No plugin or external codec needed Uses the native MP4 renderer from After Effects 2023.
Render Queue support Convert immediately or add items to the Render Queue to process later.
Auto renaming Automatically fixes duplicate names and invalid filename characters.
Set output folder Choose where your MP4 files will be rendered.
Source items Convert videos and image sequences containing alpha channel.
Fast rendering Lightweight and optimized conversion process.
Organization tools Automatically organize created footages and folders.
Audio preservation Existing audio tracks are preserved automatically.
Artifact correction Built-in correction for non-multiple-8 resolutions, avoiding MPEG edge artifacts.
Conversion
Megabytes to Gigabytes

Usage

  1. Save your project.
  2. Set the output folder using the "Output" buttons.
  3. Select the desired items in the Project Panel and click "Convert".
  4. Done. Optionally collect files from your "Main compositions".
Extra tips:
  • If no output folder is defined, files are rendered beside the AEP project by default.
  • Use the "Organize" button to automatically move generated MP4 files into folders.
Panel Buttons
How it Works

How it works

Each processed footage item is separated into two MP4 files: one RGB video and one Alpha video.

The script automatically merges both back into a composition and replaces all original instances used in your project.

Your compositions remain visually identical — but now using optimized MP4 media.

This workflow can be done manually, but it is extremely technical and time-consuming. MP4 + Alpha Converter automates the entire process with one click.

Tutorial

Known issues & technical notes

  • Works only with video items and image sequences.
  • Intended for common 8-bpc workflow items. HDR, EXR or high-bpc media are converted to 8-bpc.
  • MP4/h264 compression may introduce slight image degradation depending on bitrate and later color correction intensity.
  • Items without alpha channel are also converted and receive a white alpha fill, preserving appearance.
  • Resolution and frame rate are limited by the h.264 specification.
  • For each converted item, the script generates two MP4 files and one composition.
  • Does not correctly convert items with FPS below 1.
  • Invalid filename characters are automatically replaced to avoid OS conflicts.
  • Solids may be recognized as video items. Avoid converting solids whenever possible.
  • In versions older than After Effects 2023, MP4 export requires the AfterCodecs plugin installed separately.

Discussions

Want to talk about it?

Head over to r/aescripts to chat with fellow users about this product.

Need Support?

Please open a support ticket to be connected directly with the author of this product

Version History

1.4.1 -

Mar 1, 2026

- AE 2026 compatibility.

1.4.0 -

Jan 13, 2025

- Fixed a bug where the script would not work if the After Effects installation was not in English. It now works in any installation language.

1.3.0 -

Nov 29, 2024

- A button has been added to automatically set the output folder to the same as the currently open project. Then the MP4 files are generated in a subfolder in this folder, making it more practical, intuitive and organized.

- The Auto Render checkbox has been removed as it was not very useful and caused bugs in some situations.

- Fixed a bug that did not detect incomplete installation in some situations.

1.2.0 -

Nov 20, 2024

- Added the "Organize" button, which moves the converted files to an appropriate folder. Previously it was automatic, which caused some conflicts.

- Fixed a bug that caused unwanted duplicates of precomps.

- The unsaved file warning dialog has been improved.

- Added a simple warning to the user that some larger items may take a while to process.

1.1.1 -

Nov 18, 2024

- Adjustment in help text.

1.1.0 -

Nov 18, 2024

- A routine has been added that identifies when the installation is incomplete and displays an alert, thus avoiding user frustration during use.

- A new simplified video tutorial has been added to teach how to complete the installation.

- Performance improvements.

1.0.7 -

Aug 20, 2024

- Performance improvements.

- Minor bug fixes.

1.0.6 -

May 4, 2024

Performance improvements.

1.0.5 -

Sep 20, 2023

Performance improvements.

1.0.4 -

Jul 19, 2023

25% faster rendering.

1.0.3 -

Jul 12, 2023

Performance improvements.

1.0.2 -

Jul 12, 2023

Add compatibility to use on versions previous AE 2023

1.0.1 -

Jul 10, 2023

Beta test version removed

1.0 -

Jul 9, 2023

Initial release

Compatibility

After Effects

2026, 2025, 2024, 2023, 2022, 2021, 2020, CC 2019, CC 2018, CC 2017, CC 2015.3, CC 2015, CC 2014, CC, CS6

EULA

END USER LICENSE AGREEMENT

This software ("the Software Product") and accompanying documentation is licensed and not sold. This Software Product is protected by copyright laws and treaties, as well as laws and treaties related to other forms of intellectual property. The author owns intellectual property rights in the Software Product. The Licensee's ("you" or "your") license to download, use, copy, or change the Software Product is subject to these rights and to all the terms and conditions of this End User License Agreement ("Agreement").

Acceptance
YOU ACCEPT AND AGREE TO BE BOUND BY THE TERMS OF THIS AGREEMENT BY SELECTING THE "ACCEPT" OPTION AND DOWNLOADING THE SOFTWARE PRODUCT OR BY INSTALLING, USING, OR COPYING THE SOFTWARE PRODUCT. YOU MUST AGREE TO ALL OF THE TERMS OF THIS AGREEMENT BEFORE YOU WILL BE ALLOWED TO DOWNLOAD THE SOFTWARE PRODUCT. IF YOU DO NOT AGREE TO ALL OF THE TERMS OF THIS AGREEMENT, YOU MUST SELECT "DECLINE" AND YOU MUST NOT INSTALL, USE, OR COPY THE SOFTWARE PRODUCT.

License Grant
This Agreement entitles you to install and use one copy of the Software Product. In addition, you may make one archival copy of the Software Product. The archival copy must be on a storage medium other than a hard drive, and may only be used for the reinstallation of the Software Product. This Agreement does not permit the installation or use of multiple copies of the Software Product, or the installation of the Software Product on more than one computer at any given time, on a system that allows shared used of applications, on a multi-user network, or on any configuration or system of computers that allows multiple users. Multiple copy use or installation is only allowed if you obtain an appropriate licensing agreement for each user and each copy of the Software Product.

Restrictions on Transfer
Without first obtaining the express written consent of the author, you may not assign your rights and obligations under this Agreement, or redistribute, encumber, sell, rent, lease, sublicense, or otherwise transfer your rights to the Software Product.

Restrictions on Use
You may not use, copy, or install the Software Product on any system with more than one computer, or permit the use, copying, or installation of the Software Product by more than one user or on more than one computer. If you hold multiple, validly licensed copies, you may not use, copy, or install the Software Product on any system with more than the number of computers permitted by license, or permit the use, copying, or installation by more users, or on more computers than the number permitted by license.

You may not decompile, "reverse-engineer", disassemble, or otherwise attempt to derive the source code for the Software Product.

Restrictions on Alteration
You may not modify the Software Product or create any derivative work of the Software Product or its accompanying documentation. Derivative works include but are not limited to translations. You may not alter any files or libraries in any portion of the Software Product.

Restrictions on Copying
You may not copy any part of the Software Product except to the extent that licensed use inherently demands the creation of a temporary copy stored in computer memory and not permanently affixed on storage medium. You may make one archival copy which must be stored on a medium other than a computer hard drive.

Disclaimer of Warranties and Limitation of Liability
UNLESS OTHERWISE EXPLICITLY AGREED TO IN WRITING BY THE AUTHOR, THE AUTHOR MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED, IN FACT OR IN LAW, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OTHER THAN AS SET FORTH IN THIS AGREEMENT OR IN THE LIMITED WARRANTY DOCUMENTS PROVIDED WITH THE SOFTWARE PRODUCT.

The author makes no warranty that the Software Product will meet your requirements or operate under your specific conditions of use. The author makes no warranty that operation of the Software Product will be secure, error free, or free from interruption. YOU MUST DETERMINE WHETHER THE SOFTWARE PRODUCT SUFFICIENTLY MEETS YOUR REQUIREMENTS FOR SECURITY AND UNINTERRUPTABILITY. YOU BEAR SOLE RESPONSIBILITY AND ALL LIABILITY FOR ANY LOSS INCURRED DUE TO FAILURE OF THE SOFTWARE PRODUCT TO MEET YOUR REQUIREMENTS. THE AUTHOR WILL NOT, UNDER ANY CIRCUMSTANCES, BE RESPONSIBLE OR LIABLE FOR THE LOSS OF DATA ON ANY COMPUTER OR INFORMATION STORAGE DEVICE.

UNDER NO CIRCUMSTANCES SHALL THE AUTHOR, ITS DIRECTORS, OFFICERS, EMPLOYEES OR AGENTS BE LIABLE TO YOU OR ANY OTHER PARTY FOR INDIRECT, CONSEQUENTIAL, SPECIAL, INCIDENTAL, PUNITIVE, OR EXEMPLARY DAMAGES OF ANY KIND INCLUDING LOST REVENUES OR PROFITS OR LOSS OF BUSINESS) RESULTING FROM THIS AGREEMENT, OR FROM THE FURNISHING, PERFORMANCE, INSTALLATION, OR USE OF THE SOFTWARE PRODUCT, WHETHER DUE TO A BREACH OF CONTRACT, BREACH OF WARRANTY, OR THE NEGLIGENCE OF THE AUTHOR OR ANY OTHER PARTY, EVEN IF THE AUTHOR IS ADVISED BEFOREHAND OF THE POSSIBILITY OF SUCH DAMAGES. TO THE EXTENT THAT THE APPLICABLE JURISDICTION LIMITS THE AUTHOR'S ABILITY TO DISCLAIM ANY IMPLIED WARRANTIES, THIS DISCLAIMER SHALL BE EFFECTIVE TO THE MAXIMUM EXTENT PERMITTED.

Limitation of Remedies and Damages
Any claim must be made within the applicable warranty period. All warranties cover only defects arising under normal use and do not include malfunctions or failure resulting from misuse, abuse, neglect, alteration, problems with electrical power, acts of nature, unusual temperatures or humidity, improper installation, or damage determined by the author to have been caused by you. All limited warranties on the Software Product are granted only to you and are non-transferable. You agree to indemnify and hold the author harmless from all claims, judgments, liabilities, expenses, or costs arising from your breach of this Agreement and/or acts or omissions.

Governing Law, Jurisdiction and Costs
This Agreement is governed by the laws of New York, without regard to New York's conflict or choice of law provisions.

Severability
If any provision of this Agreement shall be held to be invalid or unenforceable, the remainder of this Agreement shall remain in full force and effect. To the extent any express or implied restrictions are not permitted by applicable laws, these express or implied restrictions shall remain in force and effect to the maximum extent permitted by such applicable laws.

Updated: Oct 21, 2025 1:35 AM

Floating License Server Required

The Floating Server License for MP4 + Alpha Converter requires a Floating License Server (FLS) to activate and use.

You don't currently own one and don't have one in your cart. You can purchase one for $99.99, or learn more about license types.

You Already Own This Product

It looks like you already own MP4 + Alpha Converter. If you're purchasing an additional license (for second machine or a different license type), go ahead. If this was an accident, you can check your existing licenses to confirm what you have.

View My Licenses