Free online MPG to 3GPP converter

What the MPG format is

MPG, usually carrying the .mpg or .mpeg extension, commonly contains MPEG-1 or MPEG-2 video with MPEG audio. MPEG-1 files are associated with Video CD and older computer video, while MPEG-2 is used by DVDs, digital television, and some camcorders. Older video editors, disc-authoring applications, television capture software, and media players frequently create or export MPG files.

MPG is a container-oriented filename convention rather than a guarantee of one exact codec, so inspect the source before choosing output settings. FFmpeg can show the streams with ffprobe input.mpg.

What the 3GPP format is

3GPP files normally use the .3gp extension and are based on the ISO Base Media File Format. They were designed for mobile video messaging, 3G phones, low-bandwidth playback, and limited device storage. Common video codecs include H.263, MPEG-4 Part 2, and H.264; common audio codecs include AMR-NB, AMR-WB, and AAC.

The format supports smaller files through lower frame sizes, frame rates, and bitrates. Older phones usually require H.263 video with AMR-NB audio, while newer phones generally handle H.264 and AAC in a 3GPP container. A file renamed from .mpg to .3gp is not converted; the streams must be re-encoded or remuxed into a compatible 3GPP structure.

How to convert MPG to 3GPP

For a browser-based conversion, use the converter on 101convert.com for free without installing software. Upload the MPG file, select 3GPP or .3gp as the output, choose a device-compatible quality preset if available, start the conversion, and download the resulting file. Do not upload confidential video unless the service's handling terms are suitable for the content.

For local conversion, FFmpeg provides predictable codec and size controls:

1. Install FFmpeg and place the source file in a working folder.
2. For modern phones and players, run ffmpeg -i input.mpg -c:v libx264 -profile:v baseline -level 3.0 -pix_fmt yuv420p -vf "scale='min(640,iw)':-2" -r 25 -b:v 700k -c:a aac -ar 44100 -ac 2 -b:a 96k -movflags +faststart output.3gp.
3. For older 3G phones, use H.263 video and AMR-NB audio when the installed FFmpeg build includes those encoders: ffmpeg -i input.mpg -c:v h263 -vf "scale=176:144" -r 15 -b:v 192k -c:a libopencore_amr -ar 8000 -ac 1 -b:a 12.2k output.3gp.
4. Check the generated file with ffprobe output.3gp, then test it on the intended phone or application.

If the H.263 or AMR encoder is unavailable, run ffmpeg -encoders to check the build. The H.264/AAC command is usually more compatible with current software, but it may fail on legacy handsets that only support the older 3GPP profiles.

Quality and compatibility limits

Conversion from MPEG-1 or MPEG-2 to H.263 or H.264 is a lossy re-encode, so detail lost through a low output bitrate cannot be restored. Keep the original MPG as the archival copy. Scaling a large source down to 176×144, 320×240, or 640×360 reduces size, but enlarging a low-resolution source does not improve detail.

Use a frame size, frame rate, and audio sample rate supported by the target device. Very old phones may reject stereo audio, high frame rates, H.264, AAC, or files larger than a few megabytes. Modern players may accept .3gp with H.264/AAC but reject H.263/AMR combinations if the container metadata is unusual. If playback fails, try a standard 3GPP preset with 176×144 video, 15 fps, mono AMR-NB, and a low video bitrate.