how do i revert jpg file back to original mp4 file

[prm06152013]

somehow when I thought I was using a good program wondershare to zip my mp4 files of my brother in laws wedding, my mp4 files got converted to jpg files and now they are pictures. How do I get the video back?

 

[USAFRet]

somehow when I thought I was using a good program wondershare to zip my mp4 files of my brother in laws wedding, my mp4 files got converted to jpg files and now they are pictures. How do I get the video back?

If that software magically changed an mp4 to a series of jpg....
1. That is really really bad
2. I am unsure of how or why it did that
3. If it is now actual jpg, any audio information is long gone
4. This is when you retrieve the originals from your backup