Exiv2

The likely cause of both problems is unprotected access to non-existing values: Both images have several empty tags like these two:

Exif.Image.Orientation                       Short       0
Exif.Image.XResolution                       Rational    0

I.e., an orientation tag of type Short with 0 elements and an X-resolution tag of type Rational with no elements either. Accessing the non-existing value of such a tag typically through Exifdatum::toLong() or Exifdatum::toRational() results in undefined behaviour, usually a segfault.

Please check if your application ensures that the value has at least one element before it calls toLong() or toRational() etc. The usual way to do this is with a count() > 0 test, something like this:

Exiv2::ExifKey key("Exif.Image.Orientation");
Exiv2::ExifData::const_iterator it = exifData.findKey(key);
if (it != exifData.end() && it->count() > 0) {
    long orientation = it->toLong();
}

Thank's, looks like it was what you expected. Should be fixed now on our code.