Please find another implementation for bilinear https://github.com/HazemSamir/FFmpeg/commit/6a62f6db30bed37323d70eb7d66d6c33fa8f00c3
Please let me know your thoughts. On 3/14/18, Paul B Mahol <one...@gmail.com> wrote: > On 3/14/18, Hazem Ashmawy <hazem.s.ashm...@gmail.com> wrote: >> So I'm still looking into using bilinear instead of nearest. Most of >> the online discussions are in the context of computer graphics and >> using things like openGL shaders. >> >> One solution I found and may try to implement is to add padding pixels >> around each face tile in the input frame. This should help in handling >> sampling near cube edges and corners. However, I'm not sure about the >> complexity of this or its effect on the performance. WDYT? > > Either that or doing it hard way, by picking different pixels for each face. > Anyway that (padding) solution doesn't sound that bad, and is much simpler > than > above mentioned alternative. > >> >> Meanwhile this is a hacky/lazy way to use bilinear, but I can barely >> notice any improvements >> over using nearest by my bare eyes, are there any systematic way to >> evaluate the quality? > > Not realy. One could compare with another projection conversion utility, > there are at least two freely available AFAIK. > >> https://github.com/HazemSamir/FFmpeg/commit/fcd82b9782b5f32072d9b0516b275fe3d4f4a163 >> >> On 3/12/18, Paul B Mahol <one...@gmail.com> wrote: >>> On 3/12/18, Hazem Ashmawy <hazem.s.ashm...@gmail.com> wrote: >>>> On 3/12/18, Paul B Mahol <one...@gmail.com> wrote: >>>>> On 3/12/18, Hazem Ashmawy <hazem.s.ashm...@gmail.com> wrote: >>>>>> Sorry about that! Here is github branch >>>>>> >>>>>> https://github.com/FFmpeg/FFmpeg/compare/master...HazemSamir:panorama_youtube >>>>> >>>>> Good, now can you look at how to use bilinear instead of nearest >>>>> interpolation >>>>> for cubemap to equirectangular conversion. >>>>> >>>>> Nearest is extremly ugly. >>>>> >>>> Sure, will look into that. Just to take that into my consideration, >>>> why didn't you use it at the first place? Were there any obstacles? >>> >>> It was non-trivial to do. >>> _______________________________________________ >>> ffmpeg-devel mailing list >>> ffmpeg-devel@ffmpeg.org >>> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel >>> >> _______________________________________________ >> ffmpeg-devel mailing list >> ffmpeg-devel@ffmpeg.org >> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel >> > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel > _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
