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| author | Lou Logan <lou@lrcd.com> | 2016-02-11 15:44:40 -0900 |
|---|---|---|
| committer | Lou Logan <lou@lrcd.com> | 2016-02-12 09:58:11 -0900 |
| commit | 0b0121d7f2093367798216a37506dbd053073a60 (patch) | |
| tree | 62bf8be773ba754bbd9dbf44f98e25be8578ac7e /doc | |
| parent | f0a8212436c47afca997c4ce3af2da09cc30a4e4 (diff) | |
| download | ffmpeg-0b0121d7f2093367798216a37506dbd053073a60.tar.gz | |
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 <lou@lrcd.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/filters.texi | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index 35f5050bfc..b7762101a6 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 |