Convert FLV to MOD — Free Online Tool
Convert FLV (Flash Video) files to MOD format, the MPEG-2 based container used by JVC and Panasonic camcorders. This tool re-encodes the video stream using H.264 (libx264) and AAC audio, producing a MOD file compatible with camcorder-based workflows and legacy editing software that expects MPEG-PS structured video.
to
FFmpeg Command
Copy this command to run the same conversion locally with FFmpeg on your desktop. Download FFmpeg
Drop your FLV 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
FLV files typically carry H.264 video and AAC or MP3 audio wrapped in Adobe's Flash container. MOD is not a standard container in the way MP4 or MKV are — it is essentially a renamed MPEG-PS (Program Stream) file as recorded by JVC and Panasonic camcorders. Because FLV's container structure is entirely different from MPEG-PS, a full remux is not possible; the video must be re-encoded. This tool encodes the video to H.264 using libx264 with a CRF of 23 (a visually near-lossless quality level), and encodes the audio to AAC at 128k bitrate. The resulting file uses the .mod extension, which downstream camcorder editing tools and archiving workflows will recognize as a valid camcorder recording format.
What Each Flag Does
| Flag | What it does |
|---|---|
ffmpeg
|
Invokes the FFmpeg binary — the open-source multimedia processing engine that performs all decoding, encoding, and container repackaging for this FLV-to-MOD conversion. |
-i input.flv
|
Specifies the input file — an FLV (Flash Video) container, which may internally contain H.264, Sorenson Spark, or VP6 video alongside AAC or MP3 audio. FFmpeg auto-detects the internal codec and demuxes accordingly. |
-c:v libx264
|
Encodes the output video stream using the libx264 H.264 encoder. Because the FLV container is structurally incompatible with MPEG-PS (MOD), the video cannot be stream-copied and must be fully re-encoded; H.264 is chosen here for its compression efficiency and broad compatibility. |
-c:a aac
|
Encodes the audio stream to AAC using FFmpeg's native AAC encoder. Whether the FLV source carried AAC or MP3 audio, the audio is re-encoded to AAC to ensure compatibility within the MOD output container. |
-crf 23
|
Sets the Constant Rate Factor for the H.264 video encode to 23, which is the libx264 default and represents a balanced quality-to-filesize ratio. Lower values (e.g., 18) increase quality and file size; higher values (e.g., 28) reduce file size with more visible compression. |
-b:a 128k
|
Sets the AAC audio output bitrate to 128 kilobits per second — a standard quality level that is appropriate for most spoken word and music content carried in FLV source files. Increase to 192k or 256k for higher-fidelity audio output. |
output.mod
|
Specifies the output filename with the .mod extension. FFmpeg uses this extension to write a MPEG-PS compatible container structure, mirroring the file format recorded directly by JVC and Panasonic camcorders. |
Common Use Cases
- Importing archived Flash video content — such as downloaded lecture recordings or old web video — into JVC or Panasonic camcorder editing software that natively reads MOD files
- Migrating a collection of FLV files from a legacy Flash-based video platform into a camcorder-compatible archive format for long-term storage alongside actual camcorder footage
- Preparing FLV-sourced content for use with older NLE (non-linear editing) software that was bundled with JVC or Panasonic camcorders and only accepts MOD as its primary input format
- Combining web-sourced FLV clips with native .MOD camcorder recordings for a unified project timeline in camcorder-centric editing tools
- Converting FLV screen recordings or event videos into MOD format so they can be burned to DVD via camcorder companion software that only accepts MPEG-PS based sources
- Archiving Flash-era video content into a format that mirrors the MPEG-2 PS structure expected by certain legacy broadcast and institutional video management systems
Frequently Asked Questions
Yes — MOD files recorded by JVC and Panasonic camcorders are structurally MPEG Program Streams (MPEG-PS), typically with a .mod extension added by the camcorder's firmware. This tool produces an H.264/AAC encoded output in a compatible container structure with the .mod extension. Note that original camcorder MOD files typically contain MPEG-2 video rather than H.264, so while the file structure and extension are compatible, some strict camcorder companion software may expect MPEG-2 encoding specifically.
Yes — FLV files are already lossy (typically H.264 or Sorenson Spark video with AAC or MP3 audio), and re-encoding to a new H.264 stream introduces an additional generation of compression loss. The default CRF value of 23 keeps this loss minimal and visually transparent for most content, but it is a decode-then-reencode process, not a lossless remux. Lowering the CRF value (e.g., to 18) will preserve more detail at the cost of a larger output file.
Yes. Older FLV files commonly used Sorenson Spark (FLV1) or On2 VP6 video codecs rather than H.264. FFmpeg can decode both of these codecs, so regardless of which video codec your FLV uses internally, it will be decoded and then re-encoded to H.264 for the MOD output. You may notice slightly more quality loss if your source FLV uses VP6, since that codec's visual characteristics differ from H.264's.
To change video quality, modify the -crf value: lower numbers (e.g., -crf 18) produce higher quality and larger files, while higher numbers (e.g., -crf 28) produce smaller files with more compression. To change audio bitrate, replace 128k in -b:a 128k with your preferred value such as 192k or 256k for better audio fidelity. For example: ffmpeg -i input.flv -c:v libx264 -c:a aac -crf 18 -b:a 192k output.mod
The single-file command shown targets one input file at a time, but on Linux or macOS you can batch process with a shell loop: for f in *.flv; do ffmpeg -i "$f" -c:v libx264 -c:a aac -crf 23 -b:a 128k "${f%.flv}.mod"; done. On Windows Command Prompt you can use: for %f in (*.flv) do ffmpeg -i "%f" -c:v libx264 -c:a aac -crf 23 -b:a 128k "%~nf.mod". This browser-based tool processes one file at a time, so the desktop FFmpeg command is particularly useful for bulk conversions.
FLV files can carry metadata in onMetaData script tags (duration, framerate, dimensions, etc.), but MOD/MPEG-PS has very limited metadata support by design — it was conceived as a raw recording format, not a rich media container. FFmpeg will attempt to map available metadata, but most FLV-specific tags will not survive the conversion. Embedded timestamps and chapter markers are not supported in MOD, and the .mod extension itself carries no sidecar metadata file (unlike the .MOI files that accompany real camcorder MOD recordings).
Technical Notes
MOD is an unconventional target format for web-sourced FLV content because it was designed as a direct-to-disk recording format for consumer camcorders, not as a distribution or archiving container. The MPEG-PS structure it is based on lacks the indexing and seeking efficiency of modern containers like MP4 or MKV. When FFmpeg writes a .mod output file, it produces a valid MPEG-PS compatible stream with the .mod extension, but authentic camcorder MOD recordings would typically pair with a .MOI sidecar file (containing recording metadata like date/time and scene information) — this tool does not generate a .MOI file. Original JVC/Panasonic MOD files also use MPEG-2 video encoding rather than H.264; this tool uses H.264 (libx264) because it provides superior compression efficiency and broad decoder support, but if your target software strictly validates MPEG-2 video within the MOD container, you may need to additionally specify -c:v mpeg2video in the desktop FFmpeg command. Neither FLV nor MOD support transparency, subtitles, chapters, or multiple audio tracks, so no data of those types is lost in this conversion. File sizes will vary depending on the complexity of the source FLV content, but H.264 at CRF 23 typically produces output comparable in size to or smaller than the source FLV.