MyMediaTools

Convert 3G2 to MOD — Free Online Tool

Convert 3G2 files from legacy CDMA mobile devices into MOD format compatible with JVC and Panasonic camcorder workflows, re-encoding video with H.264 and audio with AAC inside the MPEG-PS-derived MOD container. This is especially useful when archiving or editing old mobile footage alongside camcorder recordings in post-production pipelines that expect MOD input.

FFmpeg Command

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Estimated output:

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How It Works

3G2 is a mobile-optimized container built for CDMA network transmission, typically carrying H.264 video and AAC audio at low bitrates tuned for bandwidth-constrained delivery. MOD is a camcorder-specific format used by JVC and Panasonic devices, structurally based on MPEG-2 Program Stream but commonly processed with H.264 video in modern implementations. During this conversion, the video stream is decoded from its 3G2 wrapper and re-encoded using libx264 at CRF 23 — a visually transparent quality level — and the AAC audio is re-encoded at 128k bitrate. Because the two containers have fundamentally different structures and intended use cases (mobile streaming versus camcorder recording), a full transcode is necessary rather than a simple remux. The output MOD file will be significantly larger than the source 3G2 due to the higher target bitrate typical of camcorder-grade recordings.

What Each Flag Does

Flag What it does
ffmpeg Invokes the FFmpeg tool, which handles all decoding, encoding, and container remuxing. In the browser-based version of this tool, FFmpeg runs via WebAssembly (FFmpeg.wasm) entirely client-side with no server upload.
-i input.3g2 Specifies the input file in 3G2 format — a CDMA mobile multimedia container typically carrying H.264 video and AAC audio at low bitrates designed for wireless transmission.
-c:v libx264 Encodes the output video using the libx264 H.264 encoder, transcoding the video stream from its mobile-compressed 3G2 source into H.264 suitable for the MOD container.
-c:a aac Re-encodes the audio stream using the AAC codec. Although the source 3G2 file also uses AAC, a full decode-and-encode cycle is required because the audio must be repackaged into the MOD/MPEG-PS container structure.
-crf 23 Sets the Constant Rate Factor for libx264 to 23, the default quality level that balances file size and visual fidelity. This is appropriate for compensating for the low-bitrate mobile source material without producing excessively large MOD output files.
-b:a 128k Targets an audio bitrate of 128 kilobits per second for the AAC output track, which is standard stereo quality sufficient for the dialogue and ambient audio typically captured by mobile phones recording in 3G2 format.
output.mod Specifies the output filename with the .mod extension, which causes FFmpeg to write a MOD file — the MPEG-PS-derived container format associated with JVC and Panasonic camcorder recordings.

Common Use Cases

  • Archiving old footage shot on a CDMA-era mobile phone into a MOD-based camcorder archive alongside JVC or Panasonic recordings from the same event
  • Importing mobile 3G2 clips into legacy video editing software that recognizes MOD files from camcorders but does not natively support 3G2 containers
  • Standardizing a mixed collection of 3G2 mobile clips and MOD camcorder files into a single format for batch editing in consumer NLE applications like Corel VideoStudio
  • Recovering and converting 3G2 footage from old CDMA phones for use in a Panasonic camcorder-based home video archive system
  • Preparing mobile-shot 3G2 video for playback on standalone DVD players or set-top devices that support MOD disc formats from Panasonic camcorders
  • Converting 3G2 clips to MOD as part of a workflow that feeds footage into camcorder companion software expecting the MOD file extension

Frequently Asked Questions

Because 3G2 files from mobile CDMA devices are already lossy and typically encoded at low bitrates, re-encoding to MOD with libx264 at CRF 23 should produce visually comparable or even improved output if the source was heavily compressed. However, any lossy-to-lossy transcode introduces at least some generation loss, since the video must be fully decoded and re-encoded rather than copied. If preserving maximum quality is critical, you can lower the CRF value (e.g., to 18) in the FFmpeg command to allocate more bits to the output.
3G2 was specifically designed for low-bitrate transmission over CDMA mobile networks, so source files are typically very small and heavily compressed. MOD files, by contrast, originate from standalone camcorders that record at much higher bitrates for better image quality. Re-encoding with libx264 at CRF 23 will naturally produce a larger file because the encoder allocates more data to faithfully represent each frame than the original mobile encoder did.
MOD is a camcorder-centric format derived from MPEG-PS, and it has very limited metadata support compared to modern containers like MP4 or MKV. The 3G2 container can carry mobile-specific metadata such as GPS coordinates and device information, but this metadata will not be preserved in the MOD output during conversion. If metadata retention is important, consider an intermediate format like MP4 before any further processing.
Yes. To adjust video quality, change the -crf value: lower numbers like 18 produce higher quality at larger file sizes, while higher numbers like 35 produce smaller files with more compression artifacts. The range is 0 (lossless) to 51 (worst quality), with 23 as the default balance. To adjust audio quality, change the -b:a value to options like 96k for smaller files or 192k for better audio fidelity.
Yes. On Linux or macOS you can use a shell loop: `for f in *.3g2; do ffmpeg -i "$f" -c:v libx264 -c:a aac -crf 23 -b:a 128k "${f%.3g2}.mod"; done`. On Windows Command Prompt, use: `for %f in (*.3g2) do ffmpeg -i "%f" -c:v libx264 -c:a aac -crf 23 -b:a 128k "%~nf.mod"`. The browser-based tool processes one file at a time, so the FFmpeg command is especially useful for bulk conversions.
MOD files produced by this conversion use H.264 video rather than the original MPEG-2 video that JVC and Panasonic camcorders natively recorded, which means playback compatibility on the physical camcorder hardware itself is not guaranteed. However, PC software like Panasonic HD Writer or general media players that open MOD files by extension should handle H.264-in-MOD without issue. If you need strict hardware camcorder compatibility, you would need to transcode to MPEG-2 video specifically, which requires a different FFmpeg command.

Technical Notes

The MOD format is essentially a renamed MPEG-2 Program Stream container — physical JVC and Panasonic camcorders record MPEG-2 video inside it, but software and players often treat the .mod extension generically and will accept other video codecs like H.264. This conversion uses libx264 rather than an MPEG-2 encoder (mpeg2video) because H.264 delivers substantially better quality-to-size ratios, and the MOD output here is intended for software workflows rather than direct camcorder hardware playback. The 3G2 source format does not support subtitles, chapters, or multiple audio tracks, so none of those streams need to be handled during conversion — the transcode is straightforwardly one video and one audio stream. The -movflags +faststart flag present in 3G2 output configurations is not applied here since MOD/MPEG-PS does not use the MP4 box structure that faststart optimizes. Audio is re-encoded from AAC to AAC, which means a full decode-and-encode cycle occurs even though the codec name is identical, because the container change requires it — there is no stream copy shortcut available between these two formats.

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