CONVERT MTS → 3GP (MTS to 3GP)
Fast, secure MTS to 3GP conversion. No registration required.
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HOW TO CONVERT MTS → 3GP
Drop the video file
Select a MTS file. We read the container and stream descriptors to plan the conversion.
FFmpeg handles the repackage
When codecs align, FFmpeg rewraps the existing streams into a 3GP container — no quality loss, near-instant finish.
Retrieve the 3GP
The 3GP download is ready in seconds for stream-copy jobs, minutes for full transcodes.
Setup: MTS is the AVCHD camcorder variant of the MPEG transport stream. Goal: an interchangeable 3GP. If you need a 3GP version of a MTS clip for a social platform, a stock site or a CMS upload widget, this tool handles the job without re-rendering anything when it does not have to. The output is the same pixel data in a container the destination actually accepts. Worth knowing: MTS is the AVCHD camcorder variant of the MPEG transport stream. Meanwhile 3GP is the mobile video container standardised by 3GPP for early smartphones.
Why convert MTS to 3GP
Sending MTS to someone on a non-matching operating system frequently leads to "file cannot be opened". 3GP avoids that by sitting in the middle of everyone's compatibility list. The repackage runs quickly and without generational loss when codecs already align.
MTS vs 3GP — Technical specifications
Side-by-side comparison of the technical details.
MTS
- MIME type
- video/mp2t
- Extension
- .mts
- Container
- BDAV MPEG-2 Transport Stream (192-byte packets)
- Video codecs
- H.264 (AVCHD Main/High Profile)
- Audio codecs
- AC-3 (Dolby Digital), LPCM
- MIME Type
- video/mp2t
- Category
- Video Files
- Full Name
- AVCHD Video
- Conversion Engine
- FFMPEG
3GP
- Extension
- .3gp
- Container
- MPEG-4 Part 14 subset
- Video codecs
- H.263, MPEG-4 SP, H.264
- Audio codecs
- AMR-NB, AMR-WB, AAC
- MIME Type
- video/3gpp
- Category
- Video Files
- Full Name
- 3GPP Video
- Conversion Engine
- FFMPEG
- MIME types
- video/3gpp, video/3gpp2
- Extensions
- .3gp, .3g2
| Specification | MTS | 3GP |
|---|---|---|
| MIME type | video/mp2t | — |
| Extension | .mts | .3gp |
| Container | BDAV MPEG-2 Transport Stream (192-byte packets) | MPEG-4 Part 14 subset |
| Video codecs | H.264 (AVCHD Main/High Profile) | H.263, MPEG-4 SP, H.264 |
| Audio codecs | AC-3 (Dolby Digital), LPCM | AMR-NB, AMR-WB, AAC |
| MIME Type | video/mp2t | video/3gpp |
| Category | Video Files | Video Files |
| Full Name | AVCHD Video | 3GPP Video |
| Conversion Engine | FFMPEG | FFMPEG |
| MIME types | — | video/3gpp, video/3gpp2 |
| Extensions | — | .3gp, .3g2 |
MTS vs 3GP — Strengths and limitations
What each format does best, and where it falls short.
MTS Strengths
- Native format for every AVCHD camcorder since 2006.
- H.264 compression — small files for high-def quality.
- Direct compatibility with iMovie, Premiere, Resolve, Final Cut.
- Carries Dolby Digital 5.1 audio on flagship camcorders.
Limitations
- Slow to decode — editors typically transcode for editing.
- Proprietary folder-structure conventions complicate direct import.
- Largely legacy as smartphones replaced dedicated camcorders.
3GP Strengths
- Extremely low bitrate and file size — great for 2G/3G networks.
- Universal playback in feature phones and early smartphones.
- Based on MP4 — easy to convert and handle with modern tools.
- Mandatory codec in every 3G device since 2001.
Limitations
- Tiny resolutions — rarely above 320×240 in practice.
- H.263 video is far behind H.264 in compression efficiency.
- Metadata support is minimal.
Quality & Compatibility
Resolution, frame rate and colour space are preserved end-to-end. If the 3GP container does not support some MTS features (chapters, multiple subtitle tracks, DRM-protected streams), those are flattened or dropped with a warning. Hard-coded subtitles in the video frames always survive.
Tips for Best Results
- Embedded subtitle tracks convert between MTS and 3GP when both containers support the same subtitle codec; otherwise burn the subtitles into the video first.
- For portrait (9:16) clips, make sure the 3GP encoder preserves the correct display aspect ratio — some players default to 16:9 if SAR is ambiguous.
- Long recordings (over an hour) benefit from chapter metadata; 3GP may not preserve MTS chapters — check before relying on them.
Frequently Asked Questions
Only when it has to. If the codecs inside MTS (usually H.264 or H.265 for video, AAC for audio) are accepted by 3GP, we stream-copy — the bytes are repackaged into the new container with zero re-encoding and no quality loss. When the source uses a codec the target does not support, we transcode at a matching bitrate to keep the visual quality close to the original.
With stream copy, expect the job to finish in seconds to tens of seconds regardless of video length — the work is mostly rewriting the container. Transcoding is slower (roughly real-time: a ten-minute clip takes about ten minutes) because every frame must be decoded and re-encoded. The progress bar shows which mode applies.
Yes. Resolution, frame rate, colour space and bit depth are preserved by default; stream copy is literally bit-identical on these parameters. If you explicitly pick a lower bitrate or a different codec in Advanced, the output is rebuilt to those settings, but the default is always "match the source".
AVCHD Video
Source formatMTS (AVCHD) is a high-definition video format from Sony and Panasonic camcorders.
3GPP Video
Target format3GP is a multimedia container designed for 3G mobile phones. It stores video and audio at low bitrates optimized for limited bandwidth. Many early mobile phone recordings use this format.
Common Use Cases
Share across platforms
Send 3GP files to anyone without worrying about whether they have the right software for MTS.
Embed in documents
Drop 3GP output into Word, Google Docs, PowerPoint, Notion or a website without conversion warnings.
Optimize size
3GP often produces smaller files than MTS for web, email and storage.
Archive & future-proof
Store in a widely-supported format that will still open on future operating systems without legacy plugins.
MTS vs 3GP — Typical file sizes
Approximate file sizes for common scenarios.
- 1 min HD AVCHD (17 Mbps) ~130 MB
- 1 hour AVCHD Full HD ~8 GB
- 1-min MMS video (176×144) 300-800 KB
- 5-min phone clip (320×240) 5-15 MB
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Related comparisons
See these formats side by side to understand which fits your use case best.
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