Free online M2T to 3GP converter

What the M2T format is

M2T is a video container commonly used for MPEG-2 transport stream recordings from HDV camcorders. The file usually contains MPEG-2 video and MPEG-1 Layer II audio, often at 1440×1080 or 1280×720 resolution with interlaced frames.

You may encounter M2T files after capturing tape from Sony, Canon, or JVC HDV cameras, or after exporting footage from video-capture and non-linear editing software. The extension identifies a transport-stream recording rather than a format designed for small mobile devices, so many phones and basic media players cannot read it directly.

What the 3GP format is

3GP is a multimedia container developed for mobile networks and older 3G phones. It can hold H.263, MPEG-4 Part 2, or H.264 video together with AMR-NB, AMR-WB, AAC, or related audio streams, depending on the device profile.

Its main advantage is low file size: a 3GP file normally uses a small frame size, modest video bitrate, and compressed audio. Modern smartphones and desktop players support MP4 more consistently, but 3GP remains useful for legacy phones, older messaging systems, and software that specifically requires the .3gp extension.

How to convert M2T to 3GP

Using FFmpeg

FFmpeg is suitable when you need control over resolution, deinterlacing, codecs, and bitrate. After installing a build that includes H.264 and AAC encoders, open a terminal in the folder containing the source file and run:

ffmpeg -i "input.m2t" -vf "yadif,scale=480:-2,setsar=1" -c:v libx264 -profile:v baseline -level 3.0 -pix_fmt yuv420p -b:v 700k -c:a aac -b:a 96k -ar 44100 -ac 2 -f 3gp "output.3gp"

• yadif deinterlaces HDV footage; omit it if the source is already progressive.
• scale=480:-2 limits the width to 480 pixels while preserving the aspect ratio with an even height. Use a smaller width such as 320 for very old phones.
• libx264 with the Baseline profile improves compatibility with older 3GP-capable devices.
• -b:v 700k controls video size and quality; 300–500 kbit/s is more suitable for small-screen playback, while 700–1000 kbit/s preserves more detail.
• -f 3gp explicitly selects the 3GP container instead of relying only on the output extension.

If the target device does not support H.264, try MPEG-4 Part 2 video instead:

ffmpeg -i "input.m2t" -vf "yadif,scale=320:-2,setsar=1" -c:v mpeg4 -b:v 400k -c:a aac -b:a 64k -ar 22050 -ac 1 -f 3gp "output.3gp"

For a no-install workflow, upload the file to 101convert.com, choose 3GP as the output format, configure the available quality options, and download the converted file.

Quality, compatibility, and limitations

Conversion cannot restore detail lost through downscaling, deinterlacing, or lower bitrate encoding. M2T footage is often interlaced, so skipping deinterlacing can produce horizontal combing artifacts on progressive phone screens.

3GP compatibility varies more than the extension suggests. A legacy phone may require H.263 video and AMR-NB audio, while another device may accept only a specific frame size, frame rate, or bitrate. If the first output does not play, use 176×144 or 320×240 video, 15 or [a-zA-Z]+ fps, mono audio at 22.05 kHz, and a lower bitrate; a device-specific encoder may be needed for very old hardware.

Check the result with a player such as VLC before transferring it. Keep the original M2T file because the 3GP version is a delivery copy with reduced resolution and compression quality.