Convert MPEG-2 Transport Stream (.m2ts) to 3GPP Multimedia (.3gp) online for free. Fast, secure video conversion with no watermarks or registration.
Conversion settings — add a file to adjust
Upload your .m2ts file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .3gp file when it's ready.
M2TS (MPEG-2 Transport Stream) is the container format used by Blu-ray discs and AVCHD camcorders, wrapping H.264/AVC or H.265/HEVC video with AC3, DTS, or LPCM audio. Each packet includes an extra 4-byte timestamp for precise synchronization — critical for broadcast and disc-based playback. 3GP is the 3GPP multimedia format designed for GSM mobile networks, optimized for low-bandwidth streaming and feature phone playback. Converting M2TS to 3GP compresses high-quality Blu-ray or camcorder footage into the most compact mobile video format.
M2TS files from Blu-ray discs can be 20-50 GB and from AVCHD camcorders 1-4 GB per hour — far too large for mobile transfer or playback on basic phones. Converting to 3GP dramatically reduces file size (often 50-100x) while producing a format that works on virtually every mobile device, including budget smartphones and feature phones. 3GP is also ideal for MMS (multimedia messaging) where file size limits are as low as 300 KB.
FFmpeg demuxes the M2TS transport stream, extracts the H.264 or H.265 video and AC3/DTS/LPCM audio, then re-encodes everything for 3GP constraints. Video is downscaled to QCIF (176x144) or CIF (352x288) using H.263 or MPEG-4 Part 2 at 64-384 kbps. Audio is transcoded from multi-channel AC3/DTS to AMR-NB mono at 12.2 kbps or AAC-LC at 32-64 kbps. The transport stream's timing information is discarded in favor of 3GP's simpler timing model.
The quality reduction is dramatic — M2TS at 1080p/30 Mbps to 3GP at CIF/256 kbps represents roughly a 100x compression ratio. Fine detail, text, and fast motion from the original HD or 4K content will be heavily compressed. The 3GP output is watchable for identifying content and following basic narratives but is not suitable for quality-critical viewing. Audio quality is telephone-grade with AMR-NB.
| Device | M2TS | 3GP |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Native |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Resolution: 1280x720
Bitrate: 4 Mbps
8MB free, 50MB Nitro
M2TS to 3GP conversion serves the specific need of making HD/Blu-ray content accessible on the most basic mobile devices. The extreme compression tradeoff is unavoidable but makes otherwise inaccessible high-definition content viewable on any phone.
安全传输
HTTPS 加密上传
隐私优先
文件处理后自动删除
无需注册
即刻开始转换
随处可用
任何浏览器，任何设备
| No |
| 特性 | M2TS | 3GP |
|---|---|---|
| 全称 | Blu-ray BDAV MPEG-2 Transport Stream | 3GPP Multimedia |
| 扩展名 | .m2ts | .3gp |
| 最适合 | Blu-ray format | Mobile optimized |