On Tue, Aug 16, 2016, 1:47 AM Paul B Mahol <one...@gmail.com> wrote: > On 8/15/16, Davinder Singh <ds.mud...@gmail.com> wrote: > > On Tue, Aug 16, 2016 at 1:40 AM Davinder Singh <ds.mud...@gmail.com> > wrote: > > > >> On Sat, Aug 13, 2016 at 8:05 PM Paul B Mahol <one...@gmail.com> wrote: > >> > >>> [...] > >> > >> > >>> Also, why is there no code for scene change detection? > >>> If scene changes abruptly it will give bad frame. > >>> > >> > >> added scene change detection from framerate filter: > >> > >> > https://github.com/dsmudhar/FFmpeg/commit/1ad01c530569dfa1f085a31b6435597a97001a78 > >> > >> On Sat, Aug 13, 2016 at 10:41 PM Michael Niedermayer > >> <mich...@niedermayer.cc> wrote: > >> > >>> [...] > >> > >> > >>> the motion estimation should already produce a "matching score" of some > >>> kind for every block, its sum is probably a good indication how > >>> similar frames are > >>> the sum probably would need to be compared to some meassure of variance > >>> for the frame so near black frames dont get better matches > >>> a bit like a correlation coefficient > >>> you can also look at > >>> git grep scene libavcodec/mpegvideo* libavcodec/motion_es* > >>> > >> > >> i also tested comparing sum of SBAD score but it gave me mostly false > >> detection. > >> vf_framerate one works even with dark scenes (i reduced threshold from 7 > >> to 5) correctly, though it doesn't consider any motion. > >> > > > > i currently duplicate the frames for one loop of interpolations (until > next > > frame arrives), blending can also be done. > > > https://github.com/dsmudhar/FFmpeg/blob/1ad01c530569dfa1f085a31b6435597a97001a78/libavfilter/vf_minterpolate.c#L1101 > > which one you think would be better? frame dup seems perfect to me > > What about artifacts with UMH? > See for example this sample: > https://media.xiph.org/video/derf/y4m/in_to_tree_420_720p50.y4m
Trying to improve the quality of frames. The "smoothness" term, suggested by Michael, should reduce the artifacts. > > _______________________________________________ > 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