从PerlMagick获得Blob jp2格式？

Question

I tried to convert png files withing a script using Image::Magick but it seems that it does not work for me (although I have an image in the $file, after the ImageToBlob command is executed, I have an empty blob):

my $image = $file->ImageToBlob(magick => 'jp2', quality => 90);

Can anyone tell me what's the correct format to obtain a jpeg2000 file? It works with other parameters for magick => 'png' / magick=>'jpg';

Answer 1

You probably don't have the JPEG2000 delegate installed, check by typing

identify -version

or

configure -list delegates | grep -i delegates