What is the difference between the formats .m4v and .mov?

I recorded a video of 18 seconds on my iPhone 6 p and sync Photos on my mac (El Capitan).

When I try to export this video of Photos on my hard drive, Photos gives me options for

  • Export 1 video...
    • Selection 4K output gives me a 24.3 MB file with a .m4v
  • The Original unmodified for 1 video export...
    • Gives me a 39 MB file with a. MOV extension

I want to store this file on a disk hard in case I want to change it in the future. What storage option gives me the most flexibility and the best resolution? MOV file is larger, but 4K does not give you the best picture? The only video editor that I use is on iOS and mac iMovie.

(18 "video is just an example. What I'm really dealing is a 15-minute video which is > 800 MB.)

Thanks for any help you can provide!

MJ - lee

Hi, mjlee,

For your application, I would only export the unmodified Original.  File more voluminous, but of better quality and more flexibility to edit later.

Yes, 4K gives a beautiful image.  But if you go in the m4v form you'd be compressing considerably and thus loss of quality.  Then, when you change it and new made, you could be compressing more.   Whenever you visit, you lose the quality.  In addition, edition would be not as accurate due to compression Group of Pictures.  So, if you can get an unmodified original .mov, I would take this option.  Your unmodified original is going to be a 4K movie much less compressed you can change and go to as high a quality as your application is capable of.

Best,

Rich

Tags: iLife

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