I am thinking of upgrading to Sony a7iv so I downloaded few sample raw files from imaging resource, dpreview etc and found that DT is unable to open few of the raw files. This camera is available for quite some time now and the files were lossless variety so What is the status of support for such files?
Lossless is not supported yet: https://github.com/darktable-org/darktable/issues/8523
Uncompressed and lossy are.
See also Can't open Ī±7Sā ¢ RAW images in darktable and RawTherapee and Sony Alpha 1 (ILCE-1) support
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Similarly, RawTherapee does not yet support lossless compressed raw for similar reasons (e.g. people havenāt gotten around to it yet).
I have an A7M4 so itās on my TODO list but since the workaround is easy (shoot lossy compressed or uncompressed) itās been low priority for me.
ART probably handles it since it now uses libraw. Iām half tempted to just forget about bodging support into RT for the camera vs. just moving RT to libraw after 5.9 gets outā¦
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It seems that lossless compressed for the A7 Mark IV is now supported!!! Hopefully this will be released in DT 4.4 (couldnāt find mention of that in the release notes for 4.4).
Thanks to the developers 
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