Note: Standard FFmpeg builds do not support SWF well. You need an older build or a specialized one.
For the vast majority of home users, the golden age of Flash is over. Convert your legacy JDR files to MP4 now, save them to your cloud drive, and delete the originals. MP4 is the universal standard of the present and future—your videos will play anywhere, on any device, without a single file extension headache again. Have you successfully converted a JDR file to MP4 using a different method? Let us know in the comments below. If you are still stuck, check the TechSmith support forums or try the open-source Ruffle emulator for SWF playback. convert jdr file to mp4
FFmpeg (command line) or a dedicated SWF player like Elmedia Player (Mac) or SWF Player (Windows). Note: Standard FFmpeg builds do not support SWF well