The JDR file contains instructions for how the video should look, but it does not contain the raw video stream itself. Think of the JDR file as a "recipe" and the SWF file as the "ingredients." Without both, you cannot cook the final video.

Some older CNC machining software (like VisualCAM or specific router software) uses .jdr to store "Jig" designs. This is a 2D or 3D vector file, not a video.

If you don't have it, download it from the official VideoLAN website .

to attempt a stream copy without re-encoding to preserve quality. ffmpeg -i input.jdr -c copy output.mp4 (Note: This may fail if the JDR header is not recognized). Repackaging via VLC API : Similar to FFmpeg, VLC Media Player