Update README.md

README.md

@@ -23,11 +23,17 @@ PS> MotionPhoto2.ps1 -imageFile ImageFile.HEIC -videoFile VideoFile.MOV -outputF
 
 ## Limitations
 
-If the source image is a HDR HEIC image, Google Photo will say that the resulting photo is not HDR. This is not true - if you save the photo back to iPhone camera roll, you'll see the photo is HDR. Google Photos _will_ actually show it too, but only when it is stored in local photos. Unfortunately the same place where Motion Photos are defined (in XMP object GCamera - `http://ns.google.com/photos/1.0/camera/`) is also the place where Google/Android JPEG/R HDR information is stored. It appears that the server-side processing of Google Photos does not check for Apple HDR once it finds Google Camera header. The two formats appear to be significantly different, thus an easy conversion is not possible. See [Issue #2](https://github.com/PetrVys/MotionPhoto2/issues/2) for more details.
+If the source image is a HDR HEIC image, Google Photos will say that the resulting photo is not HDR. This is not true - if you save the photo back to iPhone camera roll, you'll see the photo is HDR.
+
+Google Photos _will_ actually show it too, but only when it is stored in local photos.
+
+The reason is probably directly related to Motion Photos -  the same place where Motion Photos are defined (in XMP object GCamera - `http://ns.google.com/photos/1.0/camera/`) is also the place where Google/Android stores JPEG/R HDR information.
+
+It appears that the server-side processing of Google Photos does not check for Apple HDR once it finds Google Camera header in XMP tags. The two formats appear to be significantly different, thus an easy conversion is not possible. See [Issue #2](https://github.com/PetrVys/MotionPhoto2/issues/2) for more details.
 
 ## About
 
-The script is written with Windows in mind, but it should be possible to use it on Linux and MacOS too (possibly with some tweaking of the used .Net objects). Patches for this are welcome.
+The script is written with Windows in mind, but it should be possible to use it on Linux and MacOS PowerShell too (possibly with some tweaking of the used .Net objects). Patches for this are welcome.
 
 Photos are created to mimic the way Galaxy S20 FE phones create HEIC motion photos. This format internally refers to itself as mpv2, which is referred to in this document as Motion Photo version 2 (even though the XMP tag still says it's version 1).
 Thanks to [@tribut](https://github.com/tribut) for uploading a sample photo [here](https://github.com/photoprism/photoprism/issues/1739#issuecomment-1216457652). Without it, this project would never start, as this format is very different from original Motion Photo spec and seems to be amalgamation of Google and Samsung ideas on how to store image and video in the same file.