On Mon, Dec 11, 2017 at 12:09:33PM -0500, Vittorio Giovara wrote: > >* On 12/8/17, Paul B Mahol <onemda at gmail.com <http://gmail.com>>* > >> On 12/8/17, Vittorio Giovara <vittorio.giovara at gmail.com > >> <http://ffmpeg.org/mailman/listinfo/ffmpeg-devel>> wrote: > >*> If we were to break this feature, I'd suggest going the full route of > *>*> adding a PixelFormaton and work on a sws alternative (one is allowed to > *>*> dream no?). > *> > > This is step to right direction, why would adding yet another API be better > > solution? > > > > J formats are hack - misfeature - most obvious reason why nobody added > > 10bit J formats, or one of alpha. Calling it otherwise, points to severe > > lack of understanding of problem. > > I am perfectly aware that the J formats are a hack, that's why it would be > nice to avoid introducing more hacks to get rid of them. > As it has been pointed out in the other thread, simply adding .color_range > does not properly solve this problem, it is a breaking change without > proper deprecation period, and in general it seems like not a good idea > API-wise to add an endless number of fields to AVCodec. > Like I said, having dealt with the problem in the past, the only way I > suggest to go forward is decoupling codec/filter negotiation from pixel > formats and use a different scaling/color conversion library.
The problem is completely unrelated to the scaling/color conversion library. Its difficult to remove them from libavcodec and libavfilter. And i belive paul is doing good and hard work here. If there is a issue in swscale from spliting range out, iam happy to look into fixing that if someone gives me a reproduceable test case thx [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Asymptotically faster algorithms should always be preferred if you have asymptotical amounts of data
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