Convert 3GPP to WTV — Free Online Tool
Convert 3GPP mobile video files to WTV (Windows Television) format for playback and archiving in Windows Media Center. This tool re-encodes the 3GP stream using H.264 video and AAC audio — the same codecs used by WTV — while upgrading the audio bitrate from mobile-optimized 64k to broadcast-quality 128k.
to
FFmpeg Command
Copy this command to run the same conversion locally with FFmpeg on your desktop. Download FFmpeg
Drop your 3GPP 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
3GPP files are lightweight mobile containers designed for 3G networks, typically carrying H.264 or MPEG-4 video alongside low-bitrate AAC or MP3 audio. WTV is a structured broadcast recording container used by Windows Vista/7/8 Media Center, capable of storing higher-quality H.264 video, multi-track audio, and embedded metadata. During this conversion, FFmpeg decodes the 3GP video and audio streams and re-encodes both: video is encoded to H.264 using libx264 at CRF 23 (a perceptually balanced quality level), and audio is re-encoded to AAC at 128k — double the 64k default common in 3GPP files. Because 3GPP does not support subtitles or multiple audio tracks, those WTV features remain unused in the output. The result is a WTV file sized and quality-matched for desktop DVR playback rather than mobile streaming.
What Each Flag Does
| Flag | What it does |
|---|---|
ffmpeg
|
Invokes the FFmpeg tool, which handles all decoding, re-encoding, and container muxing for this 3GPP-to-WTV conversion entirely in your browser via WebAssembly. |
-i input.3gp
|
Specifies the input 3GPP file. FFmpeg reads the mobile container and demuxes the video and audio streams for re-encoding into the WTV format. |
-c:v libx264
|
Re-encodes the video stream using the libx264 H.264 encoder, which WTV supports natively and which provides a good balance of quality and file size for desktop DVR-style playback. |
-c:a aac
|
Re-encodes the audio stream to AAC using FFmpeg's native AAC encoder, upgrading the audio from the mobile-optimized bitrate of the 3GP source to a quality level suitable for home media playback. |
-crf 23
|
Sets the Constant Rate Factor for the H.264 encode to 23, a perceptually balanced default. Since the 3GPP source is already lossy, this value avoids unnecessary bloat while preserving the best possible quality from the mobile original. |
-b:a 128k
|
Targets an audio bitrate of 128 kilobits per second for the AAC output stream, doubling the typical 64k mobile default used in 3GPP files and producing audio quality appropriate for speakers or a home theater connected to a Media Center PC. |
output.wtv
|
Specifies the output filename with the .wtv extension, which tells FFmpeg to mux the re-encoded H.264 and AAC streams into the Windows Television container format used by Windows Media Center. |
Common Use Cases
- Archiving old 3GPP video clips recorded on early-2000s Nokia or Sony Ericsson phones into a format that Windows Media Center can index and play back natively.
- Importing field footage shot on a 3G-era mobile device into a Windows Media Center library alongside recorded TV broadcasts for unified home media management.
- Upscaling the audio quality of a 3GPP clip from its typical 32k–64k mobile bitrate to 128k AAC so it sounds acceptable on a home theater system connected to a Media Center PC.
- Converting 3GPP video evidence or reference clips into WTV so they can be opened in Windows Media Player or other WTV-compatible players on a Windows desktop without installing extra codecs.
- Standardizing a batch of legacy 3GPP clips from an old phone backup into a single container format for long-term local archival on a Windows-based NAS or DVR system.
- Preparing a 3GPP clip for editing in applications that accept WTV input by re-encoding it into a more full-featured container that supports richer metadata embedding.
Frequently Asked Questions
No — this conversion re-encodes from one lossy format to another, so the video quality cannot exceed what was captured in the original 3GP file. The H.264 encoder targets CRF 23, which is a reasonable quality setting, but any detail lost during the original mobile recording cannot be recovered. You may notice slight quality degradation compared to the source due to the additional encode generation.
3GPP files are designed for 3G mobile networks where bandwidth is scarce, so 64k AAC is a common default. WTV is a desktop broadcast recording format where storage space is less constrained and audio fidelity matters more. The tool defaults to 128k AAC for the WTV output to produce audio appropriate for playback on a home media system rather than a phone speaker. If your source 3GP audio was already at 32k or 48k, the upward re-encode will not add information that wasn't there, but the output will at least not bottleneck any future re-encoding.
Yes, WTV is a native format for Windows Vista, 7, and 8 Media Center, and Windows Media Player on those systems can open WTV files directly. On Windows 10 and 11, native WTV support was removed from the built-in apps, so you may need a third-party player like VLC or need to convert the WTV to a more modern container. The H.264/AAC codec combination used in this output is broadly supported.
Generally no. 3GPP metadata is stored in MP4-style atoms, while WTV embeds metadata in its own proprietary ASF-derived structure. FFmpeg does not automatically map 3GPP-specific metadata fields into WTV metadata during this conversion. Standard tags like title may transfer if present, but device-specific fields from the mobile recording will likely be lost.
Adjust the -crf value in the command. Lower numbers mean higher quality and larger file size — for example, -crf 18 produces near-visually-lossless H.264 output, while -crf 28 produces a noticeably smaller but lower-quality file. Since the source is a compressed 3GPP file, values below 18 rarely add visible benefit but will significantly increase file size. A value between 20 and 26 is usually appropriate for 3GP source material.
The single-file command shown requires one input and one output per run, but you can batch process in a shell. On Windows, use a for loop: 'for %f in (*.3gp) do ffmpeg -i "%f" -c:v libx264 -c:a aac -crf 23 -b:a 128k "%~nf.wtv"'. On Linux or macOS, use: 'for f in *.3gp; do ffmpeg -i "$f" -c:v libx264 -c:a aac -crf 23 -b:a 128k "${f%.3gp}.wtv"; done'. This is especially useful when digitizing a large archive of old mobile recordings.
Technical Notes
3GPP is technically a profile of the MPEG-4 Part 12 container (sharing its atom/box structure with MP4), while WTV is based on Microsoft's Advanced Systems Format (ASF), making these two fundamentally incompatible containers — a full remux without re-encoding is not possible. Both formats support H.264 video and AAC audio, but the streams must still be decoded and re-encoded because the container framing, timing metadata, and sample packaging differ significantly. The -movflags +faststart flag present in 3GPP output tools is not needed here since WTV does not use the moov atom structure. WTV supports multiple audio tracks and subtitles, but since 3GPP supports neither, the output WTV will contain only a single video and single audio stream. File sizes will typically increase substantially compared to the 3GP source, because WTV uses less aggressive compression defaults than mobile-targeted 3GPP encoders, and the higher audio bitrate adds to the footprint. If you are archiving very old 3GPP files encoded with MPEG-4 Visual (not H.264), FFmpeg will handle the decode transparently, but the re-encode to H.264 will represent a larger quality loss from the original.