Hi there. The program's name is nona, and it is distributed in source code form with Hugin. http://hugin.sourceforge.net/docs/manual/Nona.html
The source code and descritpions is available here: http://hugin.sourceforge.net/docs/html/index.html I hope it helps? On 27 August 2017 at 13:35, Paul B Mahol <one...@gmail.com> wrote: > On 8/27/17, Evert Vorster <evors...@gmail.com> wrote: > > Hi there. > > Hi, > > > > > I have asked this question on the ffmpeg-users list, but it's been oddly > > quiet on this front. > > > > I am trying to create a ffmpeg command line that re-maps and stitches > > together footage from the Samsung Gear 360 camera. The basic methodoly > can > > be applied to any 360 view camera. The reason I am doing this is that the > > software that is available to do this is closed source and extremely > > expensive. For a hobbiest, this is a bad situation. > > > > First thing I do, is to load a specially crafted series of frames in > Hugin, > > and perfectly map the lenses. > > Then I make the remap files that the ffmpeg remap filter uses with nona > -c. > > I hand craft a alpha map to do the blending between the lenses, and the > > results are really good. > > > > Unfortunately I have a real problem with vignetting. > > The vignette filter in ffmpeg seems to have some room for improvement. > > In Ffmpeg there is only one variable, and the x,y center. This allows for > > only one type of vignetting correction with the "backward" option set. > > > > In Hugin (and the panotools) the lens is described with 3 variables, and > an > > x,y center. This enables the vignetting strength to be described as a > > custom curve. > > > > If you are curious about the project, this is the github page, with > > examples. > > https://github.com/evertvorster/dualfisheye2equirectangular_ffmpeg_remap > > There are example .pto files, that when loaded in Hugin show the lens > > chataristics of the Samsung Gear 360 lenses, and some sample footage to > > test on. > > > > How difficult would it be to port the panotools' vignetting correcting > > filter into ffmpeg? > > How it is actually named? > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel > -- Evert Vorster Isometrix Acquistion Superchief _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
