Hi Moitz, any tips how to procede with this issue if i get no feedback soon? Should i report this as a bug somewhere? Or is the user mailing list the right place for a developer to pick it up?
Thanks, Andy On Tue, Aug 26, 2014 at 2:11 PM, Moritz Barsnick <[email protected]> wrote: > Hi James, > > On Tue, Aug 26, 2014 at 12:43:53 +0200, James Darnley wrote: >> Did you try adding yuvj420p? What about the other yuvj* "colourspaces"? > > I didn't try, but I reckoned that if the target format PNG implies > non-YUV colorspaces (does it?) and RGB24 is quite common (is it?), > there would be a conversion from yuvj420p -> rbg24 somewhere along the > way in the chain anyway. > > But indeed there's no obvious reason for me to omit those. > >> I'm not familiar the filter at all but using interleaved RGB data could >> be very wrong if it treats neighbouring samples as separate pixels. > > That's why I noted that I have no idea what I am doing. ;-) > > Indeed, now I tried adding those AV_PIX_FMTs to the delogo source as > well. The "scaler" is now auto-inserted behind delogo with this log: > > [auto-inserted scaler 0 @ 0xb3db7e0] w:854 h:480 fmt:yuvj420p sar:1/1 -> > w:854 h:480 fmt:rgb24 sar:1/1 flags:0x4 > > Using the delogo filter (with w=0:h=0), the result of these conversions > is still identical whether the filter uses yuvj420p or rgb24. > > By the way, trying this hint with the original unhacked filter: > > https://trac.ffmpeg.org/ticket/225#comment:9 > >> A way to skirt this "problem", which I don't know if it is one >> actually, is to use the option >> >> -vf mp=eq=0:0 >> >> It's an equaliser filter used to adjust brightness and contrast >> ported from mplayer. >> As you can see it does no modification to the values of contrast and >> brightness but helps leaving untouched the pixel values range. > > did not help with the result. (This was an attempt to find a way to > preserve the contrast despite the colorspace conversion, regardless of > the delogo filter "hack".) > > Moritz > _______________________________________________ > ffmpeg-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/ffmpeg-user _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user
