CPTX is a project file created with Adobe Captivate. Each file contains screen recordings along with other data such as music, videos or animations. Adobe Captivate offers users tools to edit the recording, add effects or do some basic video montage.
After converting the file to the new format, you will be able to use other programs to support it. Keep in mind, however, that the CPTX file after converting to CPDT may differ slightly from the original. The most important information should be kept, but if you want the file after conversion from CPTX to CPDT to be the same, you have to do this carefully and choose the proper application from the list below.
There is no guarantee, of course, that the conversion will come up to all your expectations, but it will certainly help you. If, after all, the effect of converting CPTX to CPDT does not meet your expectations, you can simply try to find on the Internet a different version of your file in CPTX format, properly converted to a CPDT file by someone else. If this fails, use the information provided in the further part of the website.
Unfortunately, if after performing the two previously described steps (trying to find your CPTX file converted by someone else, and the attempt to convert it to CPDT on your own) you still have a problem with your file, then there are only a few solutions left. You can once again try to find and install an application that can open the CPTX file in its original format (without conversion to CPDT file). Such a solution will be difficult to implement, but it certainly will give the best result.