In fact, there are quite a few new features. This doesn’t mean macOS Mojave won’t be getting any new features though.
Mojave is a bug and fixes update for the most part before Apple announces some major features for the next update. Apple recently released the fifth beta of macOS Mojave to developers. MacOS Mojave, in case you haven’t heard, is the next operating system update to Apple’s macOS.
PNG.Dynamic Desktop Mac Apps By diccentfillfi1976 Follow | Public heic dynamic wallpaper file if you need it: and see if you can do a better quality export to. If you're up for it, try and see if you can get libheif compiled and running-here's the original. When compiled, the libheif says it includes an example progam heif-convert which "converts all images stored in an HEIF file to JPEG or PNG." The only disadvantage of that is the resulting JPGs added up to about 40mb, when the original wallpaper HEIF container is about 114mb-so I believe I may have lost some quality. I tried compiling it real fast and gave up (stuck on getting the libde265 dependency), and just used their online demo of the library which was stupidly easy. So I followed the GIMP plugin back to it's source, which is libheif. Unfortunately, every time I tried to get past that window, GIMP would crash. So I booted into a Ubuntu virtual machine, installed GIMP again, and was actually able to open the Mojave wallpaper HEIF, and got as far as the dialogue asking which image from the multi-image container I wanted to open.
So I booted into a Windows 10 virtual machine, downloaded GIMP, and then discovered that the compiled build for 2.10.2 for Windows accidentally doesn't include the HEIF plugin. But unfortunately the latest version is compiled for macOS.
Next, I found that GIMP in it's latest version (2.10.2) added native HEIF support, including support for multiple images. I was then able to dump all the individual pieces (with this command:) for i in `seq 977\` do mp4box -dump-item $i:path=mojave_dynamic_$i.hevc mojave_dynamic.heic done`īut then had what I think were malformed individual HEVC image files, because I couldn't get any program to open them.
I'm particularly interested in this (maybe Apple will document it and make it available for developers?) Particularly the apple_desktop:solar attribute is interesting (I'm guessing it contains the information on which image represents which time of day?) but I don't know what the encoding is for the value, or how to decode it. If you got the HEIC container/file correct, I don't see why macOS 10.14 wouldn't support 3rd party dynamic wallpapers. I'm guessing this XMP will be helpful to anyone trying to reverse engineer the format, so that people can make their own dynamic wallpapers.
heic file actually contained 977 different parts: 16 images, each made up of 60 individual tiles and 1 grid reference, plus one XMP metadata file. Running this command: mp4box -info mojave_dynamic.heic revealed the. I then found MP4box (part of GPAC) which I also couldn't get to export the images-but it provided loads of helpful information. Next I checked out MagickStudio which has HEIF support, but proved to be a dead end when trying to work with multi-image HEIFs. While I could get it to display the first image stored in the file, getting it to display any of the other images proved unfruitful.
I was having trouble compiling their tools, but I noticed they also provided a Javascript version of their HEIF reader (used on the example page to load the images.) I took that (actually just took the whole example page) and reverse engineered it to display the mojave_dynamic.heic file. However, the HEIF file spec allows for multiple images to be stored in one file (as is the case with this dynamic wallpaper) but is widely unsupported. So the HEIF image format is fairly well supported, especially on Mac with Quick Look, Preview, Photoshop all being able to open HEIF files.