That's what's on my mind. Why is Apple simply unable to provide this simple, simple service?
MacBook Air (2018 or later)
There's nothing difficult about it. Open one file in the supplied QuickTime Player. In the menu, choose Edit > Add Clip to End… . Choose the file you want to add. The next video will be added directly behind the first. Click the Done button. Save it.
There's nothing difficult about it. Open one file in the supplied QuickTime Player. In the menu, choose Edit > Add Clip to End… . Choose the file you want to add. The next video will be added directly behind the first. Click the Done button. Save it.
You can also open the first video, and then just drag/drop the second onto the opened video and it will append to the end in the timeline. Then Save…
It's not absurd. It's failing to open the file because it's treating the .001 as an unknown file extension. This isn't DOS where you can join split pieces right on the command line with:
copy/b mp4.001+mp4.002 movie.mp4
Give the files the correct names and it will work. Rename the first one as part1.mp4, and the next as part2.mp4. Now open them in QuickTime to put the two together.
Post a link to these files and others here can give it a try to see what's going on.
As Terence noted, if there's more than two parts, it won't work no matter what you do. All files have a header that tell the OS/app how many bytes to expect. If there's (for example) three binary parts, and you only assemble two, the resulting file will likely fail to open as the expected data size is wrong.
An mp4 is just a container. If QuickTime can play both clips you can merge them.
Select one of the files, press "command + I". In the window that opens, what does it say under "More Info:"?
Does VLC Player open them?
If not...
https://videoconverter.wondershare.com/vlc/mp4-not-playing-on-vlc-player.html
Thanks, Kurt. Sounds simple. But isn't. If only!! No, it's typical of my experience sofar: the file (an mp4.001) won't open in Quicktime Message comes saying Quicktime can't open files of this type. (Which is absurd.) It was so kind of you to reply so promptly. Please - further help.
That 001, 002 etc suffix looks very like parts of a file that's been split into pieces and would require reassembly by the app that did the splitting. Without a: that app. and b: all the parts (if there are more), you're going nowhere I'm afraid.
Kurt, thank you so much for your patience. Alas I get the following message: QuickTime Player can't open "part1.mp4".
Thanks, dialabrain. But QT won't plat either clip. Doesn't like .001 & .002 endings. And if I rename the files to end with mp4, as recommended by Kurt, on this forum, QT won't play them either.
Yup, there's a few ways to do it.
Good luck carey. I'm out.
Nothing, alas. There's an arrow next to it, but nothing appears if you try to click on it.
Were these files originally from some kind of bundle, like a .rar file or similar?
Someone please help. I just want to join two mp4 files. NOT ONE OF THE 20 OR SO 'FILE JOINERS' ON OFFER WORKS. I don't want to make a movie, convert to pdf, ALL I WANT TO DO IS JOIN TWO FILES, SIMPLY. For a PC user, hjsplit does this, effortlessly.
