Although gpac handled well heic images, and gives extensive documentation on image extraction, no information is given to reconstruct a multi-pid images in heic into a single image. Example of these images can be found
here, e.g. image1.heic.
It seems from the documentation that only extraction of single items can be currently done.
This is correct, we currently don't support HEIF grid reconstruction or other multi-pids images. Any help on this is welcome, as we don't plan on supporting this in the near future...
Although gpac handled well heic images, and gives extensive documentation on image extraction, no information is given to reconstruct a multi-pid images in heic into a single image. Example of these images can be found here, e.g. image1.heic.
It seems from the documentation that only extraction of single items can be currently done.