Add support for "Motion Photos"

[lbdroid]

GCam creates a small video around the shutter moment in mp4 format and appends it to the end of the jpeg file. They also add a few EXIF tags describing the video, example as follows;

Motion Photo                    : 1
Motion Photo Version            : 1
Motion Photo Presentation Timestamp Us: 1166199
Directory Item Mime             : image/jpeg
Directory Item Semantic         : Primary
Directory Item Length           : 0
Directory Item Padding          : 0
Directory Item Mime             : video/mp4
Directory Item Semantic         : MotionPhoto
Directory Item Length           : 3774306
Directory Item Padding          : 0

The video, in this case, is 3,774,306 bytes at the end of the file. The format of the video is an actual mp4 video. It can be copied into an mp4 file directly using "dd" as; dd bs={filelen-3774306} skip=1 if=file.MP.jpg of=file.MP.mp4

[ghost]

Just to add a bit of information in case anyone's confused:

This is the equivalent to Apple iOS's "Live Photo" pictures.

[realpixelcode]

How could one view such motion photos on ungoogled devices?

[lbdroid]

This link has details about how a viewer can be implemented; https://medium.com/android-news/working-with-motion-photos-da0aa49b50c

[realpixelcode]

@lbdroid Do you know of any OSS apps that have such a viewer included?

[lbdroid]

@realpixelcode : That's out of scope. This issue is about CREATING the files.

[realpixelcode]

Sure, but why bother creating fancy motion photos if the user isn't even able to view them in the first place (or has to rely on proprietary Google apps)?

[lbdroid]

1 step at a time. Feel free to create another issue for that. Please stop polluting this issue.

[thestinger]

The camera's gallery would need to be able to display them.

[realpixelcode]

The camera's gallery would need to be able to display them.

Yeah, exactly. Otherwise, it wouldn't make sense to implement motion photos.

[lbdroid]

@realpixelcode : No, you completely missed the point. The camera's gallery is IN THE CAMERA APPLICATION.

[realpixelcode]

Yes. I know that. Graphene camera's internal gallery must be able to view motion photos. Otherwise it does not make sense to implement the option to take motion photos.

[lbdroid]

Are you quite finished now that you've contributed absolutely nothing?

[thestinger]

@lbdroid Why are you doing this across a bunch of issues?

[lbdroid]

This is an issue that I brought forward, you think its inappropriate to be slightly defensive when someone tries to side track it?

[meichthys]

@lbdroid Do you know of any OSS apps that have such a viewer included?

@realpixelcode Ideally the gallery would support this 👍 There are also other applications that support this including Immich, Nextcloud Memories (no native app yet), Photoprism, and others.

[meichthys]

Just for reference, there currently does not seem to be any open source cameras that implement motion/live photos although there are some viewers like Aves and others.

If GrapheneOS Camera implemented this, it would be the first open source camera to do so AFAIK.