I too have been hampered by this error. I did update my ATI drivers but to no avail. Also, turning off hardware acceleration yielded the exact same error message (I did remember to restart the program after making the change).
However, I did find that a quickly constructed scene rendered fine. So, I'm thinking there must be something about my file that causes the error.
Perhaps you can shed light on what "Could not find an acceptable pixel format! - Can't create OpenGL context" refers to to help us trouble shoot our scenes in the meantime.
ive been plagued with this on/off,i have 3.0.4 latest drivers,tried on older drivers,some fixes that dont always work is create non intensive alpha,save alpha,remove black bg from rgb chanels selection in pi render,the weird part is if i drag project into pirender it works,where as if i open project n pi then choose record/render it wont work even tho either way it uses pi render,makes no sense,ive tried with/without hardware eceleration ,& on several diff pcs,windows,ive also tried past pi trials,to see if that worked ,nothing,sometimes rendering in smaller resolution also works,tho not at moment,its really weird,cause even tho same issues,wants diff solution every time,its also not specific to any format
i will try this the weird part is pirender uses wat ever project settings was last used,even if the project loaded isnt that one for example say i have project a and b and load b a will render,also testes 720 480 works anything hier has issues ,but i will try ur suggestion tho
ive tried this no sucess,it will render project but only if directly draged to pirender,not if i open project then click record/render,which is the werid part,a couple days ago it wasnt working,i installed driver,it worked,then stoped,i also just did resotr,not recovery,and will be rolling back my video driver even tho it lates,and not beta,im going to see if rollback helps