How to convert AVCHD to MP4?

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What is AVCHD and how do you convert AVCHD files?

Edited by Pat Bitton

September 19, 2019

What is AVCHD? The AVCHD video format is commonly used for storing HD video on today’s digital cameras. It uses the MPEG-4 AVC / H.264 codec for video compression, which results in great video quality and a relatively small file size. However, you may encounter problems with AVCHD because of its low support.

Here are some issues you may come across.

AVCHD is not supported on your device

The AVCHD format is not recognized by most mobile devices, so if your device is one of those, convert your video to a more device-friendly format like MP4 which is much more widely supported.

It’s impossible to share an AVCHD clip on social networks

AVCHD is not among the formats recommended for video uploading, at least for YouTube and Facebook. Even if you manage to upload your clip, the quality may be reduced, so it’s better to convert it to a more compatible format like MP4 in advance.

There's no sound in your video

This might be an audio codec problem. Try to change it by converting your video file to another format with a different codec, e.g., MP4. The right software will help you do this without losing video quality.

In the guide below, we will compare AVCHD and MP4, and cover two ways of converting AVCHD files to MP4.

How to Convert AVCHD to MP4 without Quality Loss Using the Movavi Software

The first option to convert AVCHD videos is to use file conversion software. We recommend you try Movavi Video Converter – a fast and reliable program that supports more than 180 media formats and lets you convert video, audio, and even image files. It will help you to convert AVCHD to MP4 quickly, thanks to the ultimate SuperSpeed technology. Plus, if you have a video in a different format (AVI, MKV, MOV, FLV, etc.) that’s been compressed with the H.264 codec, the decoder will help you transfer the video stream to the MP4 container without re-compression (convert H.264 to MP4). The program can also help you change the video codec for your MP4 video from MPEG-4 to H.264 (convert MP4 to H.264).

To learn how to convert AVCHD to MP4 without quality loss, download Movavi Video Converter for Windows or Mac and follow the simple guide below.

Install Movavi Video Converter

Open the downloaded installation file and follow the instructions on your computer screen to install the video encoder software.

Add the Files for Conversion

First, connect the AVCHD camera to your computer. Click the Add Media button and select Add Video. Now open the folder containing the files you want to convert, and add those files to the program.

Select an Output Format

Open the Video tab, click the MP4 category, and choose the desired preset from the list. To create an MP4 video for a specific mobile device, open the Devices tab and select the preset for the target device.

Start the Conversion from AVCHD to MP4

By default, the converted files will be saved to the Movavi Library folder. You can continue with this folder or choose a different one by clicking the Folder icon.

Now all the required settings have been specified, so you can start converting your files. Click Convert to launch the conversion from AVCHD to MP4; on completion, the folder containing the converted videos will open automatically.


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How to Use an Online AVCHD-to-MP4 Converter

Another option to convert AVCHD files to MP4 is to use an online conversion tool. If you don’t want to install any additional software on your computer, you can try using the online video converter at

First, open the website. Then click Add Your Media in the upper left corner of the screen, choose the file you want to convert, and hit the Convert button. After the conversion is complete, click the Download button to save the file on your computer. It is very easy to convert AVCHD to MP4 online, but note that you can only convert one file at a time, and that the file size is limited.

AVCHD vs. MP4 – Comparing the Formats

If you want to compare MP4 vs. AVCHD, keep in mind that these formats are used for different purposes. MP4 is mostly used to play back video, and is supported by almost all existing device types. AVCHD was developed to store video at very high quality and watch it on Blu-ray or HD TV, not on mobile devices or computers. Here’s a table with the main format differences.

Comparison parameterAVCHDMP4
File extension.mts, .m2ts.mp4
Video coding formatsH.264/MPEG-4 AVCH.264/MPEG-4 AVC, HEVC/MPEG-H Part 2/H.265, MPEG-2 Part 2, MPEG-4 ASP, H.263, VC-1, Dirac, others
Audio coding formatsDolby Digital AC-3MPEG-2/4 (HE)-AAC, MPEG-1/2 Layers I, II, III (MP3), AC-3, Apple Lossless, ALS, SLS, others
Video quality (resolution and aspect ratio)

1920×1080/60i, 50i, 24p (16:9)

1440x1080/60i, 50i (16:9)

1280×720/60p, 50p, 24p (16:9)

720×480/60i (16:9, 4:3)

720×576/50i (16:9, 4:3)

Device compatibilityBlu-ray disc players and recorders, DVD players and recorders, HD TVsCompatible with almost all devices