ffmpeg | branch: master | Lou Logan <l...@lrcd.com> | Thu Feb 11 15:44:40 2016 -0900| [0b0121d7f2093367798216a37506dbd053073a60] | committer: Lou Logan
doc/filters: add geq diagonal split screen example Also remove similar but confusing and less useful example. Based on geq expression by Patrick Race <raceink at gmail>. Signed-off-by: Lou Logan <l...@lrcd.com> Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=0b0121d7f2093367798216a37506dbd053073a60 --- doc/filters.texi | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/doc/filters.texi b/doc/filters.texi index 35f5050..b776210 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -7478,12 +7478,9 @@ geq=lum=255*gauss((X/W-0.5)*3)*gauss((Y/H-0.5)*3)/gauss(0)/gauss(0),format=gray @end example @item -Create a linear gradient to use as a mask for another filter, then -compose with @ref{overlay}. In this example the video will gradually -become more blurry from the top to the bottom of the y-axis as defined -by the linear gradient: +Diagonal split screen to compare filter effect: @example -ffmpeg -i input.mp4 -filter_complex "geq=lum=255*(Y/H),format=gray[grad];[0:v]boxblur=4[blur];[blur][grad]alphamerge[alpha];[0:v][alpha]overlay" output.mp4 +ffmpeg -i input -filter_complex "[0:v]geq=lum=if(gt(X\,Y*(W/H))\,255),format=gray[alpha];[0:v][alpha]alphamerge,curves=preset=color_negative[filtered];[0:v][filtered]overlay" output @end example @end itemize _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
