Convert RAVI to AVI

An older Optris thermal-camera recording may need conversion when a video editor, player, or reporting system accepts AVI but not the proprietary RAVI file. Exporting it also creates a conventional video copy for sharing, but the AVI may not retain the temperature data contained in the original.

What the RAVI format is

RAVI is Optris's proprietary radiometric video format, used with some Optris infrared cameras and their recording and analysis software. A RAVI recording can contain thermal measurement data and metadata in addition to the displayed infrared frames, so it is not simply an AVI file with a different extension.

RAVI is not a broadly documented, generic container. Standard players, FFmpeg, VLC, and web converters may fail to identify it because they do not include the required Optris decoder. Keep the original .ravi file if its radiometric information may be needed later.

What the AVI format is

AVI, or Audio Video Interleave, is a Microsoft container supported by many older Windows players, editing applications, and measurement systems. It is useful when the receiving application specifically requires AVI or when a broadly playable conventional video is needed.

AVI does not specify one universal codec. Compatibility depends on both the AVI container and the codec selected during export, such as Motion JPEG, MPEG-4 Part 2, or uncompressed video. AVI is therefore not automatically more compatible than MP4; its main advantage here is compatibility with legacy software.

How to convert RAVI to AVI

Use Optris software first

The appropriate converter is the Optris playback and analysis software supplied for the camera. Depending on the camera generation, this may be called PI Connect, PIX Connect, or an Optris RAVI conversion utility. Download a version that supports the camera and recording from the Optris support site rather than relying on a generic video converter.

1. Install the compatible Optris software on Windows.
2. Open the RAVI file through the software's file-opening or playback function. If the file is not recognized, install the older Optris application associated with the camera or contact Optris support.
3. Use the software's export or save-video command and select AVI as the output format. Menu names vary by version; look under File, the playback controls, or an export toolbar.
4. Choose the required frame range, dimensions, frame rate, and available AVI codec. Motion JPEG is often a practical compatibility choice; uncompressed output produces much larger files.
5. Open the resulting AVI in the target application and check its frame rate, image orientation, duration, and colors before deleting or moving the RAVI source.

Some Optris versions export the currently displayed thermal image as ordinary video rather than preserving radiometric values. If the software offers separate options for radiometric data, measurement data, or rendered video, select the data export when temperature analysis is required and AVI only when a conventional movie is the goal.

When generic converters can help

FFmpeg, HandBrake, VLC, and online services are suitable only if they explicitly recognize the particular RAVI file. Renaming recording.ravi to recording.avi does not convert it, and a command such as ffmpeg -i recording.ravi output.avi normally fails when the proprietary Optris demuxer is unavailable.

An online service such as CloudConvert may be tested only after it explicitly lists RAVI as a supported input. Do not upload thermal recordings containing people, facilities, or confidential measurements unless its retention and privacy terms are acceptable. Vendor software is generally the safer and more reliable option because it can decode the radiometric source and expose Optris-specific export settings.

Quality and compatibility limits

Exporting to AVI usually renders and re-encodes the frames, so it can reduce image quality. Use the highest practical quality or a lossless/uncompressed option when available, and keep the original RAVI as the archival master.

An ordinary AVI normally contains the visible video frames, not the original per-pixel temperature values, calibration information, measurement regions, or other radiometric metadata. It may therefore be unsuitable for later temperature calculations even when it looks identical to the RAVI playback.

AVI compatibility also depends on the selected codec. A destination that cannot open Motion JPEG or MPEG-4 may require uncompressed AVI or a codec installed by the destination software. If Optris software opens the file but cannot export it, update or downgrade to the software version matching the camera, and check for a separate Optris RAVI converter. If every Optris application rejects the file, it may be damaged, incomplete, encrypted, or from a different device generation; a generic encoder cannot convert it until the proprietary stream is decoded.