An AJP file using .ajp has meaning tied to its creator, most often acting as a CCTV/DVR backup where the device stores video in a proprietary container that typical software won’t play, produced when a user exports a selected channel and time window to a USB stick or disc, and commonly bundled with or requiring a viewer such as a Backup Player / AJP Player to access or convert the footage.

If an AJP file didn’t originate from DVR footage, it may be used by old software like Anfy Applet Generator or CAD/CAM applications such as Alphacam, so it’s not video, and you can usually pinpoint the type by looking at file size and folder structure—CCTV AJPs are massive, often accompanied by viewer programs, whereas project-style AJPs are relatively small and stored next to web or CAD resources, and by checking Properties or safely viewing it in a text editor, readable text hints at a project/config file while mostly unreadable symbols indicate a binary DVR container.

To open an .AJP file, the proper step varies by its source because Windows and standard video players don’t identify it correctly, and if yours came from a DVR export, the recommended solution is to look in the same export directory for the included playback tool—names like Player.exe, BackupPlayer.exe, or AJPPlayer.exe—launch it, load the AJP, and then use its export/convert feature to obtain a normal MP4 or AVI file.

If the AJP came without a viewer, the next logical step is to determine the DVR/NVR model and install the vendor’s CMS/VMS/backup viewer, since many systems decode AJP only through their own PC client; once set up, open the client itself and load the AJP via its Open/Playback/Local File feature, and if playback works but exporting doesn’t, your final fallback is to record the footage from the screen, which is time-intensive but can be necessary for older or locked-down formats.

If the file wasn’t produced by a camera system, it may act as a saved/project file for older animation tools or CAD/CAM platforms, which means it opens only through the original application, so investigate nearby files for names or extensions that reveal its creator, install that software, and open the file from within it, remembering that small files generally suggest project data while very large ones point to DVR exports.

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