On Sat, Aug 13, 2016 at 12:18:56PM +0000, Davinder Singh wrote: > On Thu, Aug 11, 2016 at 12:10 AM Davinder Singh <[email protected]> wrote: > > > [...] > > > > latest changes: > https://github.com/dsmudhar/FFmpeg/blob/dev/libavfilter/vf_minterpolate.c > uses shared motion estimation code now, added options, improved vsbmc > i tried to make filter options as flexible as possible so that multiple > algorithms are be supported. > > @Ronald: > have a look: > https://github.com/dsmudhar/FFmpeg/blob/dev/libavfilter/motion_estimation.c > i think if penalty factor can be moved into cost function, motion > estimation can be shared with encoders. we can start work on this after > GSoC? > > TODO: > frame border motion estimation. > add scene change threshold. roughness check doesn't work so well and > introduce artifacts. > add docs. > > > > here's another idea: dynamic block size selection for MC-FRUC > > since it's not video encoding, using 16x16 block with fixed search window > > may not work same for all resolution videos. what if we automatic resize > > block depending on resolution? like if 16x16, P=20 works fine for 1280x720 > > video, we can scale it according to width, e.g for 1920x1080 which 1.5x > > 1280, we use 24x24 block and also scale P accordingly? i haven't tested it > > yet though. > > > > i tested this. quality was improved with 1080p but not with smaller > resolution. > > I tried to scale best settings of 720p. UMH. 1080p same video. > scale nothing: mb16 p18 > stddev: 1.16 PSNR: 46.80 MAXDIFF: 197 bytes:1085529600/1073088000 > scale search window: mb16, p27 > stddev: 1.21 PSNR: 46.47 MAXDIFF: 193 bytes:1085529600/1073088000 > scale both: mb24 p18 > stddev: 1.14 PSNR: 46.93 MAXDIFF: 181 bytes:1085529600/1073088000 > > ESA > mb16 p16: > stddev: 1.18 PSNR: 46.65 MAXDIFF: 181 bytes:1085529600/1073088000 > mb24 p24: > stddev: 1.16 PSNR: 46.77 MAXDIFF: 181 bytes:1085529600/1073088000 > > 640p ESA > m16 p16: > stddev: 1.01 PSNR: 47.97 MAXDIFF: 160 bytes:119577600/118540800 > scale p: mb16 p8: > stddev: 1.02 PSNR: 47.95 MAXDIFF: 148 bytes:119577600/118540800 > scale both: m8 p8: > stddev: 1.05 PSNR: 47.63 MAXDIFF: 187 bytes:119577600/118540800 > > i think quality can be further improved, generated test window weights were > not perfect. > should i keep this feature? since block-size won't be log2 int, that will > break vsbmc which use quadtree division for smaller blocks. > > > > [1]: JVT-F017.pdf by Z Chen <http://akuvian.org/src/x264/JVT-F017.pdf.gz> > > > > > On Thu, Aug 11, 2016 at 9:09 PM Paul B Mahol <[email protected]> wrote: > > > Could you please squash your commits and attach patches that add > > vf_mestimate > > and vf_minterpolate filters? > > > > patch attached.
> doc/filters.texi | 25 > libavfilter/Makefile | 2 > libavfilter/allfilters.c | 2 > libavfilter/motion_estimation.c | 451 +++++++++++++ > libavfilter/motion_estimation.h | 76 ++ > libavfilter/vf_mestimate.c | 376 +++++++++++ > libavfilter/vf_minterpolate.c | 1332 > ++++++++++++++++++++++++++++++++++++++++ > 7 files changed, 2264 insertions(+) > c09f35d9a5d564abb4dc3227872fd757c493ccb0 > 0001-added-motion-estimation-and-interpolation-filters.patch > From 19fa6a20f017bf4712ca8a63126e59552efdeb9c Mon Sep 17 00:00:00 2001 > From: dsmudhar <[email protected]> > Date: Sat, 2 Apr 2016 23:33:17 +0530 > Subject: [PATCH] added motion estimation and interpolation filters this builds with some compiler warnings, please fix them here gcc produces: libavfilter/vf_mestimate.c: In function ‘filter_frame’: libavfilter/vf_mestimate.c:147:15: warning: unused variable ‘mv_y’ [-Wunused-variable] libavfilter/vf_mestimate.c:147:9: warning: unused variable ‘mv_x’ [-Wunused-variable] libavfilter/vf_minterpolate.c:1166:22: warning: "VSBMC_T1" is not defined [-Wundef] libavfilter/vf_minterpolate.c: In function ‘search_mv’: libavfilter/vf_minterpolate.c:417:15: warning: unused variable ‘mb_i’ [-Wunused-variable] libavfilter/vf_minterpolate.c: In function ‘bilateral_me’: libavfilter/vf_minterpolate.c:476:9: warning: unused variable ‘count’ [-Wunused-variable] libavfilter/vf_minterpolate.c:475:9: warning: unused variable ‘changed’ [-Wunused-variable] libavfilter/vf_minterpolate.c:474:15: warning: unused variable ‘mv_y’ [-Wunused-variable] libavfilter/vf_minterpolate.c:474:9: warning: unused variable ‘mv_x’ [-Wunused-variable] libavfilter/vf_minterpolate.c: In function ‘var_size_bme’: libavfilter/vf_minterpolate.c:563:5: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement] libavfilter/vf_minterpolate.c:563:15: warning: unused variable ‘T’ [-Wunused-variable] libavfilter/vf_minterpolate.c: In function ‘inject_frame’: libavfilter/vf_minterpolate.c:700:23: warning: variable ‘frame’ set but not used [-Wunused-but-set-variable] libavfilter/vf_minterpolate.c: In function ‘interpolate’: libavfilter/vf_minterpolate.c:1179:13: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement] libavfilter/vf_minterpolate.c:1089:39: warning: unused variable ‘dy’ [-Wunused-variable] libavfilter/vf_minterpolate.c:1089:35: warning: unused variable ‘dx’ [-Wunused-variable] libavfilter/vf_minterpolate.c: At top level: libavfilter/vf_minterpolate.c:353:17: warning: ‘get_sbad2’ defined but not used [-Wunused-function] libavfilter/vf_minterpolate.c:378:17: warning: ‘search_mv_esa’ defined but not used [-Wunused-function] [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB No great genius has ever existed without some touch of madness. -- Aristotle
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