not at my computer now, but if I remember right, that shows you whether HW acceleration could in theory work for some video or not at all. The second case is a

not at my computer now, but if I remember right, that shows you whether HW acceleration could in theory work for some video or not at all. The second case is a clear one. But in the first case you still don't know whether it is actually used for a certain video or not. I understand there can be many parameters preventing usage.