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After Effects
MP4 + Alpha Converter
Convert videos with alpha channel to MP4/h264, keeping the background transparent, just with one click.
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EULAEND 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").
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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
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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.
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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
Convert to MP4/h264 just with one click items containing Alpha Channel, keeping the background transparent. Works with Videos and Image Sequences.
Turn Gigabytes into Megabytes with 1 Click. Perfect for saving storage or cloud space.
For demands where MP4 is not a problem. As jobs already archived or jobs in production with intense cloud trafic or storage-intensive jobs.
Features
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Simple to use
Just one click simple interface -
No plugin or external codec needed
It uses the native MP4 renderer (AE 2023) -
Render Queue
MP4 files immediately or just add items to the render Queue to convert later -
Auto renaming
To avoid filename conflicts, automatically renames footages with duplicate names (adding a numerical counter) and fixing items with invalid file system characters ( \/|<>*:“?% ) -
Set output folder
Choose the output path for MP4 videos easily -
Source items
Select Convert videos or image sequences containing alpha channel
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Rendering
Light and fast -
Organization
Automatically organize old and new footages cleanly -
Alert system
Set of contextual alerts to avoid errors and data loss -
Keep the audio track
If an item has an audio track, it is preserved in the RGB channel, preserving the item's sound behavior -
MP4 without vertical line artifact
It has a built-in function that corrects footages with "non-multiple-8" resolutions (but without changing the appearance of the converted items), thus avoiding a known limitation of the MPEG format that generates a vertical line on the side of the video on items with this type of resolution
Usage:
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Save your project.
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Set the output folder for the rendered MP4 in the "Output" buttons.
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On project panel, select the items you want to convert and click "Convert".
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It’s all. At the end, collect files from your "Main compositions", if you want.
More:
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If you don't define the output folder, the items will be rendered in the same folder as the AEP project by default.
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Use the "Organize" button to move the created MP4 files to a folder in the Project panel.
How it works:
Each prossessed footage (i.e. MOV, PNG, etc) item is separated into 2 MP4: 1 RGB and 1 Alpha. And merged back into a composition, that replace all original instances used in compositions automatically. The comps stay the same visually, but with MP4 videos*.
This process can be performed manually, but it is very technical, difficult and too tedious. And there are better things to you do with your time. Let it do for you, with one click.
Tutorial
Known issues:
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It works only with items of the type "Video" and "Sequence of Images".
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It works correctly with 100% of the videos you use in your daily workflow. As long as they are common items with the usual 8-bpc [bits per channel] color items. Avoid using in HDR or EXR image sequences for example, or any other item with higher pbc. All footages will be converted to 8-bpc, including items with higher bpc.
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By default, the quality of the videos generated by our script is configured to be very high and with generally imperceptible losses. But, it should be stated that the MP4/h264 format although it has the advantage of generating quite small videos compared to other formats, is this format can also degrade the image quality when using lower bitrates. The h264 standard also degrades the chrominance information of the image, to levels that are not perceptible to the human eye, but that are visible after certain more intense color adjustments. Therefore, the use of this format is not recommended for footages that will undergo intense color correction later, knowing that color variations and appearance of undesirable artifacts can occur.
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It also converts items that don't have an alpha channel, and doing so adds an alpha channel to the item, making it a white filled video. In this way it does not affect the appearance of the original item.
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The maximum resolution and frame rate are limited to those defined by the h.264 standard.
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For each 1 item converted, 2 MP4 videos and 1 composition are generated, but all created in their proper subfolders to keep the project clean.
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It does not convert correctly items with FPS below 1.
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Any characters that are not allowed for filenames on some operating system will be replaced by # characters to avoid conflicts.
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This tool converts only video items and image sequences. Other types of items are rejected. But if the item is a solid, it recognizes it as video too. And since it makes no sense to convert solids to video, please avoid selecting this kind of item.
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As of version 2023, After Effects natively includes the option to render directly to MP4. To output to MP4 in older versions of After Effects, it is necessary the "AfterCodecs" plugin installed on the system. Not included in this package.
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
1.4.0 -
Jan 13, 2025
1.3.0 -
Nov 29, 2024
- 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
- 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
1.1.0 -
Nov 18, 2024
- A new simplified video tutorial has been added to teach how to complete the installation.
- Performance improvements.
1.0.7 -
Aug 20, 2024
- Minor bug fixes.
1.0.6 -
May 4, 2024
1.0.5 -
Sep 20, 2023
1.0.4 -
Jul 19, 2023
1.0.3 -
Jul 12, 2023
1.0.2 -
Jul 12, 2023
1.0.1 -
Jul 10, 2023
1.0 -
Jul 9, 2023
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