On Fri, Sep 11, 2015 at 1:15 PM, Heiner Mueller <ffm...@mxwendler.net> wrote: > >>>> i found this in the DXVA code, and i would like >>>> to optimize it a bit: >>> >>> >>> Then please send your tested patch (made with git >>> format-patch) to the development mailing list >>> where it can be reviewed. >>> >> >> I can save you the trouble though. First of all, gop_size is an >> encoding parameter, and not useful here at all. >> Secondly, there is unfortunately no parameter that conveys this >> information that is both (1) accurate, and (2) known early enough to >> be useful. > > > Yes, i was asking for the correctness of this assumption. > So the assumption is not correct =/ > > If we decode 4K video, saving four surfaces is a considerable > amount of memory. Is there a later point where we can re-set the > amount of surfaces? We can check for I-frame distances, but > this does not guarantee that we find the maximum - this may change > at any time in the stream i think.
You cannot change the number of reference frames available without re-creating the entire decoder and invalidating all old references, which would result in a serious playback disruption. I'm afraid there is no real 100% solution here. - Hendrik _______________________________________________ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
