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.

I was about to ask something similar. Specifically, is there someone we fellow users can download the pieces from to test with?

Good catch, VikingOSX. I had forgotten the latest version of QuickTime only creates .mov files. I was thinking of the Pro version of QT7, which outputs all kinds of file formats.

Okay. Then I have to assume your files were split as binary pieces and need to be concatenated back together. In that case, you can do this in Terminal.

Example:

cat file1 file2 file3 > newfile

You can leave the files named the way they are now. You don't have to go back to the .001 and such names. Assuming there are only two files, it would be:

cat part1.mp4 part2.mp4 > movie.mp4

This is simplified and assumes the files you want to join are in the current folder Unix (Terminal) is set to. Do this:

1. Create a folder on your desktop. Keep it simple. Such as, name the folder z .
2. Put your binary pieces into the folder.
3. Launch Terminal from the /Applications/Utilities/ folder.
4. Type the following in Terminal and press Enter: cd ~/Desktop/z
5. Type cat part1.mp4 part2.mp4 > movie.mp4 , or whatever you want the output file name to be.

Test to see if the output file opens. It should.

Edit: I tried to cat two .mov files and it didn't work. You may need to first rename the files back to mp4.001 and mp4.002 .

QuickTime will open a proper .mp4 video. It won't if it is actually an .m4v video, or some other video format masquerading as an .mp4 file type. The annoyance with QuickTime is that it will export to a .mov, and not retain the .mp4 on the combined movie.

You can then take that .mov into Handbrake 1.2.0 and choose an appropriate Preset, and then convert to .mp4.