Convert 3GP to MPEG — Free Online Tool
Convert 3GP mobile video files to MPEG format, re-encoding from H.264/AAC to MPEG-2 video with MP2 audio — the standard codec combination used in broadcast television and DVD-compatible playback. This tool handles the full transcoding process in your browser, making 3GP footage compatible with legacy media players, broadcast editing systems, and older hardware that predates modern mobile codecs.
to
FFmpeg Command
Copy this command to run the same conversion locally with FFmpeg on your desktop. Download FFmpeg
Drop your 3GP file here
or click to browse
Free — no uploads, no signups. Your files never leave your browser.
Settings
Note: Browser-based encoding uses approximate quality targets. For precise CRF compression, copy the FFmpeg command above and run it on your desktop.
Estimated output:
Conversion Complete!
DownloadHow It Works
3GP files typically contain H.264 video and AAC audio, codecs designed for efficient streaming over 3G mobile networks. MPEG containers require fundamentally different codecs, so this conversion performs a full transcode rather than a simple remux. The H.264 video stream is decoded and re-encoded as MPEG-2 video using a quality scale of 2 (near the highest end of the 1–31 range), and the AAC audio is decoded and re-encoded as MP2 — the audio format used in MPEG-1 and MPEG-2 broadcast standards. Because both the video and audio streams must be fully decoded and re-encoded, this is computationally heavier than a remux, and some generation loss will occur. The resulting MPEG file is significantly larger than the source 3GP due to MPEG-2's lower compression efficiency compared to H.264.
What Each Flag Does
| Flag | What it does |
|---|---|
ffmpeg
|
Invokes the FFmpeg program, the open-source multimedia processing engine that handles all decoding, transcoding, and encoding operations in this 3GP-to-MPEG conversion. |
-i input.3gp
|
Specifies the input file — a 3GP video typically containing H.264 video and AAC audio as used on 3G mobile devices. FFmpeg reads and demuxes this container to extract the raw encoded streams for processing. |
-c:v mpeg2video
|
Sets the video codec to MPEG-2, the standard video encoding format used in broadcast television and DVD. Since the input 3GP contains H.264 video, this triggers a full re-encode rather than a stream copy. |
-c:a mp2
|
Sets the audio codec to MP2 (MPEG-1 Audio Layer II), the audio standard native to MPEG-1 and MPEG-2 containers. The original AAC audio from the 3GP is fully decoded and re-encoded as MP2, which is supported by a wide range of legacy hardware including DVD players and broadcast decoders. |
-q:v 2
|
Sets the MPEG-2 video quality using the quantizer scale, where 1 is the highest quality and 31 is the lowest. A value of 2 produces near-maximum quality MPEG-2 output, keeping visual degradation from the transcode to a minimum at the cost of a larger file size. |
-b:a 192k
|
Sets the MP2 audio bitrate to 192 kilobits per second, which is the standard broadcast-quality bitrate for MP2 audio and provides good fidelity when re-encoding from the AAC audio stream in the source 3GP file. |
output.mpeg
|
Specifies the output filename and container format. The .mpeg extension signals FFmpeg to write an MPEG program stream, which wraps the MPEG-2 video and MP2 audio into a format compatible with legacy players, broadcast systems, and DVD authoring tools. |
Common Use Cases
- Importing old mobile phone footage into legacy broadcast editing systems (such as Avid or older Final Cut Pro versions) that accept MPEG-2 but not H.264 from 3GP containers
- Playing 3GP recordings captured on older Nokia or early Android phones on DVD players or set-top boxes that support MPEG playback
- Archiving 3G-era mobile video into MPEG-2, which has broader long-term decoder support in institutional and broadcast archiving workflows
- Preparing mobile-captured footage for contribution to broadcast pipelines that mandate MPEG-2 as an ingest format
- Converting 3GP clips for use in older video editing software on Windows XP or Vista-era machines that lack H.264 codec support
- Extracting usable video from 3GP files recorded on feature phones and converting them to a format compatible with DVD authoring software
Frequently Asked Questions
3GP files use H.264 video encoding, one of the most efficient compression codecs available, specifically designed to minimize file size for mobile storage and 3G transmission. MPEG-2 video is a much older standard with significantly lower compression efficiency — it requires more data to represent the same visual quality. A 3GP file that is 5MB could easily become 30–80MB as an MPEG, depending on the resolution and content. This is a normal and expected result of the codec difference, not a conversion error.
Yes — this conversion involves two stages of lossy compression. The original 3GP was already encoded with lossy H.264 and AAC, and the output MPEG re-encodes that content again using lossy MPEG-2 video and MP2 audio. Each generation of lossy encoding introduces some quality degradation. However, using -q:v 2 (near the highest quality end of MPEG-2's scale) and 192k MP2 audio minimizes the visible and audible loss. For typical 3GP footage shot at mobile resolutions (176×144, 320×240, or 640×480), the output quality should still be acceptable for most use cases.
The MPEG-2 video and MP2 audio codecs used in the output are the foundational formats for DVD-Video, but a valid DVD requires specific stream parameters including exact bitrates, frame rates (typically 25fps for PAL or 29.97fps for NTSC), and multiplexing into a program stream with strict compliance. The MPEG file produced here is a general-purpose MPEG-2 file and may not meet all DVD-Video spec requirements without further processing in dedicated DVD authoring software such as DVD Flick or DVDStyler.
No. The MPEG container format does not support the metadata atoms used by 3GP (which is based on the MPEG-4/QuickTime container structure). Recording timestamps, GPS tags, device information, and other embedded metadata present in the 3GP file are not carried over to the MPEG output. If preserving this metadata is important, consider extracting it separately with a tool like ExifTool before conversion.
The -q:v flag controls MPEG-2 video quality using a scale from 1 (highest quality, largest file) to 31 (lowest quality, smallest file). The default used here is 2, which prioritizes quality. To reduce file size at the cost of quality, increase the value — for example, replace '-q:v 2' with '-q:v 6' or '-q:v 10'. Similarly, you can adjust audio quality by changing the -b:a value from 192k to a lower bitrate like 128k or 96k to further reduce file size.
Yes. On Linux or macOS, you can loop over all 3GP files in a directory with: for f in *.3gp; do ffmpeg -i "$f" -c:v mpeg2video -c:a mp2 -q:v 2 -b:a 192k "${f%.3gp}.mpeg"; done. On Windows Command Prompt, use: for %f in (*.3gp) do ffmpeg -i "%f" -c:v mpeg2video -c:a mp2 -q:v 2 -b:a 192k "%~nf.mpeg". This applies the same codec settings to every 3GP file and outputs a corresponding MPEG file with the same base filename.
Technical Notes
The 3GP container is a restricted profile of the MPEG-4 Part 12 container, designed by 3GPP for 3G mobile networks, and commonly holds H.264 (AVC) video with AAC audio at low resolutions and bitrates. MPEG, by contrast, refers to the program stream or transport stream containers standardized under MPEG-1 and MPEG-2, which predate H.264 and use entirely different codec families. Because there is no codec overlap between the typical 3GP payload and the MPEG container's native codecs, this conversion cannot use stream copying — both video and audio must be fully transcoded. MPEG-2 video does not support the same level of compression efficiency as H.264, so output files will be substantially larger. The MP2 audio codec (MPEG-1 Audio Layer II) is less efficient than AAC but is natively supported by a broader range of hardware decoders including DVD players and broadcast equipment. Neither 3GP nor MPEG supports transparency, embedded subtitles, chapters, or multiple audio tracks, so no features are lost in that regard. Note that 3GP files from very old phones may contain AMR-NB or AMR-WB audio instead of AAC; FFmpeg will handle the transcode from AMR to MP2 correctly, but the audio quality ceiling will be limited by the original AMR encoding's narrow bandwidth.