VideoProc Converter AI

How to Combine AVI Files with Best Quality

  • Step 0. Download AVI joiner
  • Step 1. Add two or more AVI files to the program
  • Step 2. Select the target output format
  • Step 3. (Optional) Edit these video files
  • Step 4. Check High Quality Engine. Hit Merge > RUN
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Best 8 AVI Joiners to Combine AVI Files

By Cecilia Hwung | Last Update:

An AVI file is a video file with .avi as the extension name which may come with more than one video, audio, and subtitle tracks with a variety of encoding codecs such as H.264, HEVC, VP8, VP9, and DivX. An AVI joiner is an online or offline tool that can recognize AVI files and lets you combine two AVI files into one. To play the downloaded movie or the recorded video that has been saved as two or even more AVI files, using a reliable AVI joiner can absolutely make your life easier. In this post, let's take a look at how to combine AVI files without perceivable quality loss as well as the top 6 best AVI joiners in the market.

How to Combine AVI Files

Combining AVI files can be easy like walking in the park, provided you're using VideoProc Converter AI - one of the best AVI joiners in the market. It has a self-explained interface and boasts a full range of video editing features aimed at helping and pleasing beginners and professionals alike. Have a look at some of its highlight features:

  • Drag and drop to combine, trim, cut and split AVI files (precisely by frame)
  • Support AVI, MKV, MOV, MP4, WebM, FLV, 3GP files, etc
  • Rich editing features: rotate, watermark, effect, timecode, green screen…
  • Auto Copy to export videos with the original picture quality
  • Full GPU acceleration to convert/compress videos at 47x faster
Free Download For Win 7 or later
Free Download For macOS 10.13 or later

Note: The Windows version now supports AI-powered Super Resolution, Frame Interpolation, and Stabilization to enhance video and image quality. These AI features are not yet available in the Mac version but will be coming soon.

Step 1. Add AVI Files

Free download, install and run VideoProc Converter AI. Hit Video. Drag the AVI files from your computer into this AVI joiner.

Import AVI Files

Step 2. Choose Output Format

Go to Target Format and choose the desired output. If you need to combine AVI files fast without re-encoding or quality loss, then you need to choose AVI as the target format. Hit codec Option to open the Format setting panel. Herein, you can find the source video stream information. Adjust the video codec, resolution, frame rate, and other settings to make everything the same as the original.

Customize AVI Output Settings

Step 3. Edit AVI Files (Optional)

Hit Edit Video and then you can use editing tools like rotate, flip, playback speed, effects, contrast/brightness/hue/ saturation, subtitle, cut, and trim to enhance and polish your AVI files.

Edit AVI Files

Step 4. Combine AVI Files

Select Auto Copy and Merge. Hit RUN to start combining multiple AVI files as one.

Merge AVI Files

Best 8 AVI Joiners

1. VideoProc Converter AI

The best AVI joiner in the market is VideoProc Converter AI. This amazing program supports the import of over 370 video and audio formats, so it can handle the AVI files in whatever codecs, be the ancient codecs like MPEG-2 and DivX or the latest ones like H.264 and HEVC. The handy drag-and-drop feature lets you combine multiple AVI files into one single file as well as make basic edits with minimum effort. Even better, this easy video joiner offers an awesome auto copy feature, allowing you to combine, trim, cut and split AVI, MP4, MKV, MOV, and other files without re-encoding or quality loss.

AVI Video Editor

2. VirtualDub

VirtualDub is an open-source video capture and processing program, designed for compressing and combining AVI files on Windows. If you're on MacOS or Linux, then you'll need to install Wing for running this free AVI joiner. Though VirtualDub supports the AVI format, it might fail to decompress the loaded AVI files since it's only compatible with several old video and audio codecs. Besides, it might not be able to recognize the installed codecs on your computer, and in this case, you need to install third-party codec packs to successfully load your AVI files. The interface of VirtualDub is very outdated, so beginners might have to climb up the learning curve to find where the video editing tools are and how these tools can be applied to optimize the AVI files.

Virtualdub AVI Joiner

3. Avidemux

Avidemux is an open-source and lightweight video editing program. Underneath a simple and clear interface lies plenty of useful video editing tools that can help beginners make quick and basic edits. This easy AVI joiner supports dozens of popular video and audio formats including AVI, MKV, MP4, 3GP, VOB, and MOV. However, it only supports a very limited number of output formats which doesn't let you output MOV, 3GP, VP8, and many prevalent formats. Thus, it's not possible to combine AVI files without re-encoding or quality loss.

Avidemux AVI Joiner

4. VLC Media Player

If you need to combine some AVI files with the same codec, frame rate, and resolutions into one single video file and you don't need to make any basic edits like cut and trim, it's worth trying VLC media player. This free piece of multiple media player can be used as a simple AVI joiner to combine AVI files on Windows, Mac, Linux, and other mainstream platforms. Asides, this capable tool supports all audio and video formats that are compatible with libavcodec and libavformat, namely it can also be utilized to play and combine video files in MOV, WebM, MKV, MP4, and other formats.

VLC AVI Joiner

5. AVI Joiner from 123Apps

AVI Joiner from 123Apps is a web-based video editor that supports combing multiple AVI files under 700MB into one without requiring users to pay a penny. Its interface looks like a desktop-based video editing program where you can find a timeline and an extensive list of editing tools including text, opacity, rotate, trim, background color, etc. From my test, it can load AVI files with H.264, HEVC, DivX, and other trendy codecs. Unfortunately, this online AVI joiner might cause perceivable quality loss cause it doesn't offer advanced options to optimize the output encoding settings and a free account is limited export AVI files in 720P. Even worse? It saves the exported file in the MP4 format rather than AVI.

AVI Joiner from 123Apps

6. VideoCandy

VideoCandy offers a collection of online video editing tools that will allow beginners and average users to polish and spice up their videos to make their videos shine. It comes with a straightforward video joiner, with which we can merge MP4, MKV, MOV, and AVI files as well as add simple transitions, background music, and background images.

Sadly, just like the majority of other online AVI joiners, VideoCandy doesn't support customizing the codec, quality, size, and other properties for the output video files. Worse more? It will combine your AVI files into an MP4 file. If you're looking for an AVI joiner that can combine multiple AVI files into one without changing the original format or noticeable quality loss, then VideoCandy is not for you.

Video Candy AVI Joiner

7. BRIZ AVI Joiner

The UI design of BRIZ AVI Joiner is very outdated, which may make you mistake it for some kind of open source or even discontinued software. However, it's actually a paid program with a high price tag - $ 19.95. I said it's priced high because its only function is to combine AVI files. There're no extra editing tools like trim and cut. Let's say you need to split AVI files, then you need to purchase the extra AVI splitter which costs $19.95. Exporting the combined AVI file can also be a nightmare. It doesn't support the latest codecs like VP8, VP9, and HEVC. The output setting panel display many unexplained terminologies such as Profile @ Level, Encoding type, and Target quantizer.


8. ImTOO Video Joiner

ImTOO Video Joine is a simple and basic AVI joiner that comes with no additional features. Its interface is pretty straightforward and won't take more than 5 minutes to get used to. The support for dozens of other popular formats ensures you're able to combine AVI, MP4, WMV, 3GP, H.264, MOV, and other files without trouble. Plus, it preset tons of options for popular devices and platforms which helps beginners quickly combine AVI files for playing or sharing on iPhone, iPod, Apple TV, game consoles, web, etc.

ImTOO AVI Joiner

About The Author

Cecilia Hwung is the editor-in-chief of Digiarty VideoProc. With over a decade of experience, she specializes in delivering insightful content on AI trends, video/audio editing, conversion, troubleshooting, and software reviews. Her expertise makes her a trusted ally in enhancing users' digital experiences.

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Digiarty Software, established in 2006, pioneers multimedia innovation with AI-powered and GPU-accelerated solutions. With the mission to "Art Up Your Digital Life", Digiarty provides AI video/image enhancement, editing, conversion, and more solutions. VideoProc under Digiarty has attracted 4.6 million users from 180+ countries.

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