On Sun, Aug 10, 2014 at 08:36:37PM +0200, Daniel Oberhoff wrote: > > > Von meinem iPhone gesendet > > > Am 10.08.2014 um 17:50 schrieb Michael Niedermayer <michae...@gmx.at>: > > > >> On Sun, Aug 10, 2014 at 03:36:04PM +0200, Nicolas George wrote: > >> Le tridi 23 thermidor, an CCXXII, Paul B Mahol a écrit : > >>> It is not mandatory(but it would be nice) to add other methods to have > >>> this filter included into libavfilter. > >> > >> Is it really a good idea? We would end up with various interpolation / > >> anti-aliasing algorithms implemented in each filter that needs it, none of > >> them with the same set of architecture optimizations and each with its own > >> set of bugs and misfeatures. > > > >> Until someone comes up with a really satisfactory solution, I believe the > >> simple solution of suggesting users to upscale before the filter and > >> downscale after, using the optimized lswr scalers, is better. > > > > thats not practical > > a 1024x768 image would need to be upscaled to 262144x196608 to get > > 8bit precission from a nearest neighbor resampler as basis > > > > also see vf_perspective.c which supports bilinear and bicubic > > interpolation, these surely could be shared and exist already. > > > > of course we could push it with just nearest neighbor and work on that > > later, but i dont think only nearest neighbor and leaving it at that > > is a reasonable choice, its too poor quality wise > > I would like to push now, and try to generate a refactoring patch possibly > within the week.
sure, feel free to push and send a pull request, or if you prefer i can allso apply the patch if you post the latest verision Thanks [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Dictatorship naturally arises out of democracy, and the most aggravated form of tyranny and slavery out of the most extreme liberty. -- Plato
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