HEIF files (HEIC extension)

[Spectre5]

Per this comment, my understanding is that HEIC files should be supported now. However, it does not work for me, see below. I'm running Linux.

exiv2 does support it:

$ exiv2 --version
exiv2 0.27.5

$ exiv2 IMG_4236.HEIC
File name       : IMG_4236.HEIC
File size       : 2006004 Bytes
MIME type       : image/heic
Image size      : 4032 x 3024
Thumbnail       : None
Camera make     : Apple
Camera model    : iPhone SE (2nd generation)
Image timestamp : 2020:07:29 12:59:24
File number     : 
Exposure time   : 1/60 s
Aperture        : F1.8
Exposure bias   : 0 EV
Flash           : No, auto
Flash bias      : 
Focal length    : 4.0 mm
Subject distance: 
ISO speed       : 125
Exposure mode   : Auto
Metering mode   : Multi-segment
Macro mode      : 
Image quality   : 
White balance   : Auto
Copyright       : 
Exif comment    :

But when I use pyexiv2 (2.8.0), it does not work correctly:

>>> import sys
>>> sys.version
'3.9.12 (main, Aug  6 2022, 20:04:53) \n[GCC 11.2.0]'
>>> import pyexiv2
>>> pyexiv2.__version__
'2.8.0'
>>> pyexiv2.Image('IMG_4236.HEIC').read_exif()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/scott/.local/lib/python3.9/site-packages/pyexiv2/core.py", line 15, in __init__
    self.img = exiv2api.Image(filename.encode(encoding))
RuntimeError: IMG_4236.HEIC: The file contains data of an unknown image type

[Spectre5]

Maybe related: https://github.com/Exiv2/exiv2#support-for-bmff-files-cr3-heif-heic-and-avif

I see that you download a specific release and build it using pybind11 to link to Python, so maybe in the distributed version on PyPI the build does not include bmff support. My separate exiv2 does:

$ exiv2 -Vv
...
enable_bmff=1
...

[LeoHsiao1]

Exiv2 does not enable BMFF by default, because of copyright risk, so I do the same. https://github.com/LeoHsiao1/pyexiv2/blob/master/docs/Tutorial.md#bmff

[Spectre5]

So is building/installing pyexiv2 from source with the appropriate changes the only way then?

[LeoHsiao1]

No, pyexiv2 adds BMFF when compiling Exiv2. https://github.com/LeoHsiao1/pyexiv2/blob/087c4eb22898ecbba86c69e5257bca6b8333f23d/.github/workflows/build_exiv2.yml#L45

Users can enable it by calling a function: https://github.com/LeoHsiao1/pyexiv2/blob/master/docs/Tutorial.md#bmff

[Spectre5]

A, I see, thanks!