JVT/AVC coding in quicktime inspector

[Vangelis Christodoulou]

Hi,

I have been using Avidemux to change h.264/ac3 files from mkv to mp4. I use the build-in mp4v2 muxer, and when I open the resulting file in QuickTime the inspector shows them as "JVT/AVC coding".

The same in Subler (mkv to mp4) shows the as H.264. What's the difference?

Thank you, Vangelis

[Damiano Galassi]

The mp4 file format has a field called "name", where you can write a custom name string for the format. Some players like QuickTime reads it and displays the custom name to the user. And that's it, it's just for informative purpose.

[Vangelis Christodoulou]

Hi Damiano,

Thanks for your reply. I thought "JVT/AVC coding" in quicktime refers to the mp4v2 container, while "H.264" to mp4v1. Am I wrong?

V

[Damiano Galassi]

Yes you are wrong, it's just someone years ago decided to write by default "JVT/AVC coding" in a library and it remained so for a lot of years. But like I said it's just a name meant to be displayed to the user, there is no different in functionality.

[Vangelis Christodoulou]

You refer to the libmp4v2 library don't you? Is Subler using this library?

V