Free online VOB to 3G2 converter

What the VOB format is

VOB, or Video Object, is the container used on DVD-Video discs and in DVD folders. DVD authoring programs create files such as VIDEO_TS.VOB and VTS_01_1.VOB; they contain MPEG-2 video, MPEG audio or AC-3 audio, subtitles, menus, and navigation data. Media players, DVD-ripping software, VLC, and FFmpeg commonly encounter VOB files.

A single VOB can contain only part of a program because DVD titles are often split across sequential files. Converting one segment produces only that segment. For a complete title, select the main title with DVD-aware software first, or provide all sequential VOB segments to a tool that can join them correctly.

What the 3G2 format is

3G2 is the multimedia container associated with 3GPP2 CDMA mobile networks. It commonly stores MPEG-4 Part 2 or H.263 video with AAC or AMR audio, using the .3g2 extension.

Its low-resolution profiles and modest bit rates suit older phones and constrained playback devices. Modern phones and computers usually support MP4 more reliably, so 3G2 is appropriate when a specific device or application requires it rather than as a general archival format.

How to convert VOB to 3G2

FFmpeg is the most controllable desktop option. Install a build that includes the mpeg4 video encoder and the 3G2 muxer, then run:

ffmpeg -i input.vob -map 0:v:0 -map 0:a:0? -vf "yadif,scale=176:144:force_original_aspect_ratio=decrease,pad=176:144:(ow-iw)/2:(oh-ih)/2" -r 15 -c:v mpeg4 -vtag mp4v -b:v 250k -c:a aac -ar 8000 -ac 1 -b:a 24k -f 3g2 output.3g2

• yadif deinterlaces common DVD footage.
• 176x144, 15 frames per second, and low bit rates target older mobile hardware; increase them only if the device specification permits it.
• -map 0:a:0? copies the first audio stream when present without failing on a silent VOB.

For a device that specifically requires H.263 video and AMR-NB audio, replace the video and audio codec settings with encoders available in your FFmpeg build, for example -c:v h263 -c:a libopencore_amrnb -ar 8000 -ac 1 -b:a 12.2k. Some current FFmpeg packages omit AMR encoders, so the MPEG-4/AAC command is more widely usable; check the handset specification before choosing the profile.

On the 101convert.com website, use the video converter, upload the VOB, choose 3G2 as the output format, start the conversion, and download the resulting .3g2 file without installing software. Uploading a DVD-derived file may expose its contents to the service, so use desktop conversion for material that must remain local.

Quality, compatibility, and limitations

VOB-to-3G2 conversion requires re-encoding the MPEG-2 video, so it is lossy. Keep the original VOB for archiving, and do not expect a low-resolution 3G2 file to retain DVD detail. Interlaced source video should be deinterlaced; otherwise mobile playback can show comb-like horizontal artifacts.

3G2 support varies substantially between devices. A file may use a valid 3G2 container yet fail because the handset rejects its video codec, audio codec, frame size, frame rate, or bit rate. If playback fails, try H.263 with AMR-NB, a smaller frame size such as 128x96, 3GP-compatible settings, or MP4 if the device accepts it.

FFmpeg cannot decrypt CSS-protected DVD content. Use an authorized, DVD-aware application to read protected discs and export an unencrypted title before encoding; menu graphics, DVD navigation, multiple subtitle streams, and chapter behavior generally do not transfer to 3G2.