I have a recovered some video files that are in Mp4 format from a memory card. It isn’t corrupted or anything but when I try to play the recovered files on my mac after they are successfully downloaded I get a message that says, “To see if additional software is available that will enable QuickTime Player to open the movie, click Tell Me More.” Also get a message that says, “If QuickTime Player doesn’t open your file, search the Mac App Store for a third-party media player that supports the format of your file. You can search using the format name or the filename extension (such as .avi, .wmv or .mkv).”
I have tried several apps to change the format of the Mp4 file, but nothing works. I keep getting a message that says error 1 when I try to convert the file.