Some avif files not properly supported

[eugenesvk]

I've checked a few images from these AOM examples and some images aren't displayed at all:

• animals_00_multilayer.avif is not displayed at all (though Chrome also fails on this one, though some other viewers view this fine)
• animals_00_multilayer_a1lx.avif is displayed fine

Also, the first file has two "items", how would I switch between them if the file were supported, what's the name of tha "action", would this be "frameStep"?

Stream is embedded in a HEIF container as two items. Item 1: ispe = 1024x768 iloc points to layer 0 only Item 2: ispe = 2048x1535 iloc points to layer 0 and layer 1, separated in two extents

Then some HDR images hdr_cosmos01000_cicp9-16-0_lossless are displayed differently vs how Chrome displays them — rather dull and ugly in qimgv and rather bright and shiny in Chrome, though this is on a non-HDR enabled Windows system (but then so is Chrome)

Thank you

[easymodo]

multi-page heif does not work yet

vs how Chrome displays them

this is probably due to missing color management support in qimgv..