How to Free Convert AVCHD to MP4, Fast with Original Quality

Updated by Olivia Quinn to Video Converter, Convert MTS | Updated December 6, 2018

I have recorded AVCHD 1080p at 25 fps, but MP4 at only 23.97 fps (non US versions). Is there a free converter that requires minimal re-encoding that will cause little or no quality loss? I don't want to lose any quality of my camera file. -From dpreview forum

It's believable that AVCHD (Advanced Video Coding High Definition) is not unfamiliar with you in case you have a Sony or Panasonic AVCHD camcorder, as it's developed jointly by Sony and Panasonic and introduced primarily for use in high definition consumer camcorders. It supports a variety of video resolutions and scanning methods (Interlaced-scan and Progressive-scan included).

Whether you have this experience that after you record an interesting AVCHD videos with your cherished Sony or Panasonic camcorder, you are on the tiptoe of expectation to free convert AVCHD to MP4 (the most commonly used multimedia format) for playing back on your stylish iPhone 9 or Samsung Galaxy S9 to share with intimates on the go. If you really do, here is the right place that will share with you how to free convert AVCHD (mts/m2ts) to MP4 on Mac with a gratis all-purpose AVCHD to MP4 video converter.

Why is it so Hard to Transcode AVCHD?

1. AVCHD is a format commonly used to store HD videos. In other words, AVCHD videos often contains more resolutions. Dealing with the larger data is an intensive task, and if the computer can offer enough power, it will cause problems like freezes, lags, etc.

2. In addition to the HD video data, AVCHD supports uncompressd linear PCM audio. This audio format will maintain lossless audio quality while increase the file size and cause difficulty in transcoding.

3. As mentioned above, AVCHD videos are in high-definition quality. No one would want to lose quality immediataly after they transfer the freshly shot footages from camera to computer. But transcoding is bound to cause quality loss, that's why so many users are asking for "the minimum loss of quality".

Free AVCHD to MP4 Converter- 100% Quality & 5X Faster Speed

The highly recommended buckshee AVCHD to MP4 video converter is macXvideo. Specially designed for HD and even 4K UHD videos, this program can free convert AVCHD to MP4 with superb performance that you can enjoy nowhere.

* It supports interlaced and progressive AVCHD (mts, m2ts) videos from Panasonic, Sony, Canon camcorders, inclouding HD videos at 50fps, 60fps or others;
* It will convert AVCHD videos freely to MP4 as well as HEVC, AVI, MOV, WMV and any other digital formats you need;
* Its advanced compress engine is designed to reduce large size of high-definition AVCHD videos by more than 90%;
* It has two unqiue modes:
--Auto Copy: this function will passthrough the AVCHD data to MP4 without re-encoding. It ensures 100% original quality and extemely fast speed. But this feature is appliable when both AVCHD and MP4 use the same H.264 codec.
--Hardware acceleration: this cost-free AVCHD to MP4 video converter fully support GPU acceleration (QSV, Cuda, AMD) in transcoding. This feature makes the program 5x faster converting videos from AVCHD to MP4 than any other freeware. 

Secure Download
Secure Download

How to Free Compress & Convert AVCHD (mts/m2ts) to MP4

Step 1: Download the free AVCHD to MP4 video converter on computer.
Free download Mac version
Free download Mac version

Step 2:  Launch the software and click "Add Video" button to import source video. Then pick up the Output Video Format: "General Video"→"to MP4 Video" from the formats menu at the bottom of the interface.

Step 3 (Optional): This best Mac AVCHD converter to MP4 can also compress the large file size of AVCHD videos. Frist, click the OPT button with a gear icon. There you can adjust the video/audio codecs, tweak video bit rate and resolution and more. Via the Cut and Crop featurs located below the video info, you can further remove any unwanted length and parts from the video.

4K TV upscaler

Step 3: Select the Output Folder to save the output files by clicking the "Browse" button. And on the right part of the interface, make sure you have checked the boxes of Hardware accelerate engine and Auto Copy. They will detect your setting automatically and apply accordingly.

Step 4: Press the "RUN" button start free converting AVCHD to MP4 on Mac.

More info about AVCHD and MP4

AVCHD - this format is used to store large and long HD videos for its highly comrpessed HD recording. It uses extensoin M2TS, MTS and M2T. The format is now used by Panasonic, Sony, Canon, Hitachi and JVC cameras. You can burn the AVCHD videos to a DVD disc, or play it on HDTV via HDMI ports. The format is hamstrung by lack of support by video editors, players, mobiles and websites.

MP4 - Simply put, AVCHD has better video quality and large file size than MP4 while MP4 has better compatibility than AVCHD. MP4 is able to hold HD and 4K resolutions. Most often, users convert AVCHD to MP4 format as the latter for easier editing and distributing. For more detailed information on the two formats, check AVCHD vs MP4 review.

Convert AVCHD to MP4, Free and Fast

Free download the free AVCHD video converter - MacX Video Converter Free to easily and fast convert AVCHD MTS M2TS to MP4 with high quality reserved for limitelessly playbacvk on iPhone 7/7 Plus, iPhone 6S/SE/6 Plus, iPad Pro/Mini 4, Galaxy S8 etc.

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macXvideo - Free Convert AVCHD to MP4 Fast with No Quality Loss