I'm trying to get some info on the soldiers in [this picture] (https://i.imgur.com/VYT58QX.jpg). I'm pretty sure that they're Austro-Hungarian based on the uniforms, particularly the cloth field caps that some of them are wearing. I'm not 100% sure, but I've never seen that type issued elsewhere.
I don't know whether Austrian and Hungarian uniforms were distinct from one another, and I don't know what information, if any the facings on the soldiers' collars convey, or what kind of unit these guys were likely assigned to. Any information would be appreciated.
Short before WWI it was already clear to A-H, that the formerly used multi coloured uniforms are obsolote. Here is an illustrated article (in Hungarian) with the new uniforms, that were used form 1908. The soldiers on your photo do look like soldiers of the A-H army.
The next problem the Monarchy faced was the fast development of weapons in WWI. In the first years of war it was hard to tell the difference between granadiers, machinegunners or artillery infantrymen. Thats why they started to use (temporary) sewed linen squad insignias on the neckpieces, and later the metal insignias, to identify the branches.
Sorry but the photo is too blurry to see the insignias and identify the branches, but im almost sure the picture was taken between 1908 and 1917.