heif-test.go can not decode example image

[adrium]

Hi, I tried to use the heif-test.go program of tagged version 1.16.2, but it failed with the following message:

libheif version: 1.16.2
Performing lowlevel conversion of example.heic
Number of top level images: 2
List of top level image IDs: []int{20004, 20006}
Primary image: 20004
Image size: 1280 × 854
Could not decode image: Unsupported feature: Unsupported codec

Performing highlevel conversion of example.heic
Could not decode image: Unsupported feature: Unsupported codec

failed to decode image: Unsupported feature: Unsupported codec
Done.

I am using libheif-dev from Ubuntu which is at version 1.16.2-2ubuntu1.

What could be the issue?