I want to ask,I shoot in Canon5d2 raw, if I select profile Alexa log c in mlv app camera profile and I transcode in to dng file after transcoding again through aftereffects to premiere pro, In premiere pro do I need to use the lut of Alexa log c to restitute the footage ??
Profiles doesn't effect raw files when you export as DNGs from any app. DNG's is still raw data. Your hole color workflow is inside aftereffects and adobe camera raw inside there.
But premirere cannot edit the raw file isn't ?
Premiere cannot edit really edit the DNG sequence (raw). You totally could use premiere to grade the footage, but the debayering of the DNG's in premiere is atrocious. I suggest you try importing the DNG sequence in premiere and after effets. You'll see that the difference is night and day in terms of colour accuracy, edit-ability and control. The price you pay however, is that after effects renders extremely slowly. I suggest you do a bit more digging on the raw post processing section of this forum to get a better idea.