3GP vs MPG
A detailed comparison of 3GPP Video and MPEG Video (short) — file size, quality, compatibility, and which format to choose for your workflow.
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Technical Specifications
| Specification | .3GP | .MPG |
|---|---|---|
| MIME types | video/3gpp, video/3gpp2 | video/mpeg |
| Extensions | .3gp, .3g2 | .mpg |
| Container | MPEG-4 Part 14 subset | MPEG Program Stream |
| Video codecs | H.263, MPEG-4 SP, H.264 | — |
| Audio codecs | AMR-NB, AMR-WB, AAC | — |
| Codecs | — | MPEG-1 or MPEG-2 video + MP1/MP2 audio |
Strengths Comparison
.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.
.MPG Strengths
- Universal legacy support.
- Trivially rewrappable to .mp4 without re-encoding.
- Low decoding overhead.
Limitations
.3GP — Limitations
- Tiny resolutions — rarely above 320×240 in practice.
- H.263 video is far behind H.264 in compression efficiency.
- Metadata support is minimal.
- Effectively legacy — new phones default to MP4/HEVC.
.MPG — Limitations
- Aging codec — larger files than modern alternatives.
- No HDR, no modern audio, no modern subtitles.
- Mostly legacy — not used for new production.
Frequently Asked Questions
3GP (3GPP Video) is a video container format that bundles one or more video streams, audio tracks, and optional subtitles into a single file. The container format determines how metadata is organised and which codecs can live inside; the visual quality itself depends on the codec (H.264, H.265, VP9, AV1) rather than the 3GP wrapper. It is part of the video files family.
MPG (MPEG Video (short)) is a video container format that bundles one or more video streams, audio tracks, and optional subtitles into a single file. The container format determines how metadata is organised and which codecs can live inside; the visual quality itself depends on the codec (H.264, H.265, VP9, AV1) rather than the MPG wrapper. It is part of the video files family.
VLC, MPV and PotPlayer play nearly every 3GP file on desktop. Browser support varies: modern Chromium, Firefox and Safari play common containers via the HTML5 <video> tag, but niche 3GP variants may fail. If a device refuses your 3GP, convert to MP4 with our 3GP to MP4 converter for universal playback.
VLC, MPV and PotPlayer play nearly every MPG file on desktop. Browser support varies: modern Chromium, Firefox and Safari play common containers via the HTML5 <video> tag, but niche MPG variants may fail. If a device refuses your MPG, convert to MP4 with our MPG to MP4 converter for universal playback.
Upload your 3GP to KaijuConverter and pick MP4, MOV, MKV, WebM, or any other target. Our pipeline uses FFmpeg under the hood and stream-copies when codecs are compatible (no quality loss) or transcodes at high-quality defaults otherwise. Conversion runs server-side; both files delete within two hours.
Only when the target requires re-encoding. If the codecs inside 3GP match what the target container supports, FFmpeg stream-copies the streams and the output is bit-identical to the source. Transcoding uses transparent quality defaults (CRF 20–23 H.264) and produces output indistinguishable from the original at normal viewing distance.
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