Free online MTS to 3G2 converter
Convert AVCHD MTS footage to a low-resolution 3G2 file for legacy mobile devices.
Convert MTS to 3G2 online - free
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How to convert mts to 3g2 file
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What the MTS format is
MTS is an AVCHD video container based on MPEG-2 Transport Stream. It commonly contains H.264/AVC video and Dolby Digital AC-3 or uncompressed PCM audio, usually at 1080i or 720p.
Panasonic, Sony, Canon, and other HD camcorders create MTS files, often inside an AVCHD PRIVATE/AVCHD/BDMV/STREAM folder structure. Video editors and media players may also export or open MTS directly. The extension is closely related to .M2TS; both can carry AVCHD streams, although the file naming and disc-folder context differ.
What the 3G2 format is
3G2 is a multimedia container defined for CDMA-based 3G mobile networks and older mobile phones. It can store MPEG-4 Part 2, H.263, or compatible H.264 video together with AAC, AMR, or other supported mobile audio streams.
Its low-resolution, low-bitrate profiles suit legacy phones, MMS-related workflows, and applications that specifically require the .3g2 extension. It is not a quality-preserving archival format: converting high-definition MTS footage normally requires downscaling and recompression.
How to convert MTS to 3G2
For a desktop conversion, FFmpeg provides direct control over the codecs, dimensions, frame rate, and bitrate. Install a current FFmpeg build, open a terminal in the folder containing the source file, and run:
ffmpeg -i input.mts -vf "scale=320:240:force_original_aspect_ratio=decrease,pad=320:240:(ow-iw)/2:(oh-ih)/2" -r 15 -c:v mpeg4 -b:v 500k -c:a aac -b:a 64k -ar 44100 -f 3g2 output.3g2Replace input.mts with the actual filename. The command creates a 320×240 file at 15 frames per second, using MPEG-4 Part 2 video and AAC audio for broad compatibility with older 3G2 devices. Increase 500k for better picture quality if the target device supports it; decrease it to reduce file size.
To preserve the source aspect ratio without adding borders, use a width-only scale instead, for example:
ffmpeg -i input.mts -vf "scale=320:-2" -r 15 -c:v mpeg4 -b:v 500k -c:a aac -b:a 64k -ar 44100 -f 3g2 output.3g2On 101convert.com, choose the video converter, upload the MTS file, select 3G2 as the output format, start the conversion, and download the resulting file. This option runs without installing desktop software.
Quality and compatibility limitations
Conversion from AVCHD to 3G2 is normally lossy twice: the original H.264 stream is decoded, then the video is encoded again in a lower-bitrate mobile codec. Keep the MTS file as the master copy.
Older phones can reject files that technically use the 3G2 container but exceed their supported limits. If playback fails, try 176×144 or 320×240, 10–15 fps, MPEG-4 Part 2 video, AMR-NB audio, and a video bitrate below 300–500 kbps. FFmpeg can use AMR-NB when the installed build includes the required encoder:
ffmpeg -i input.mts -vf "scale=176:144" -r 15 -c:v h263 -b:v 180k -c:a libopencore_amrnb -ar 8000 -ac 1 -b:a 12.2k -f 3g2 output.3g2Device specifications determine the usable frame size, frame rate, audio codec, maximum file size, and filename handling, so test a short sample before converting a large recording.
Note: This mts to 3g2 conversion record is incomplete, must be verified, and may contain inaccuracies. Please vote below whether you found this information helpful or not.
MTS vs 3G2: format comparison
How the MTS and 3G2 formats compare on the properties that matter most for this conversion.
| Property | .MTS MPEG Transport Stream | .3G2 3GPP2 multimedia file |
|---|---|---|
| Format type | Container | Container |
| Compression | Both | Both |
| Maximum resolution | 8K and above | HD (1080p) |
| Audio tracks | Multiple | One |
| Subtitles | Embedded in the file | — |
| Streaming | Yes | Partial |
| Opens in a web browser | No | No |
| Typical file size | Medium | Small |
| Open standard | Yes | Yes |
| Introduced | 1995 | 2004 |
| Developer | Moving Picture Experts Group (MPEG) / ISO/IEC | 3GPP2 |
| MIME type | video/mp2t | video/3gpp2 |
Frequently asked questions
Is the MTS to 3G2 converter free?
Yes, converting MTS to 3G2 on 101convert.com is completely free. No registration, email address or installation is required. If you need a higher file size limit or want to convert more files at once, see our plans.
How large can my MTS file be?
You can upload MTS files up to 2000 MB and convert up to 1 files at once in a single batch.
What happens to my uploaded files?
Files are processed automatically and deleted from our servers within a few minutes after conversion. We never view or share your files.
Do I need to install any software to convert MTS to 3G2?
No. The MTS to 3G2 conversion runs entirely online in your browser and works on Windows, Mac, Linux, Android and iPhone.
Did the conversion fail?
In most cases, the cause is an incorrect file format. Please upload a valid MTS file for this MTS to 3G2 conversion. Occasionally, the issue may be on our side. We analyze recurring conversion failures and disable or fix the converter if we detect a defect.