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author | Stefano Sabatini <stefasab@gmail.com> | 2012-12-15 18:36:30 +0400 |
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committer | Stefano Sabatini <stefasab@gmail.com> | 2012-12-22 19:15:53 +0400 |
commit | 0824aa67436d4c90fb71330d97ba4a20b44ddedb (patch) | |
tree | c4995c94eeb1b0c49872d6ec3f1f2949042a4e65 | |
parent | 35b97ad7c09ed3c9553985bbbc2d27705cd1db78 (diff) |
doc/filters: add overlay daisy-chaining example
-rw-r--r-- | doc/filters.texi | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index 259a5e5efb..ac5eece3c4 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -3214,8 +3214,8 @@ to pass the two inputs through a @var{setpts=PTS-STARTPTS} filter to have them begin in the same zero timestamp, as it does the example for the @var{movie} filter. -You can chain together more overlays but the efficiency of such -approach is yet to be tested. +You can chain together more overlays but you should test the +efficiency of such approach. @subsection Examples @@ -3264,6 +3264,18 @@ The above command is the same as: @example ffplay input.avi -vf 'split[b], pad=iw*2[src], [b]deshake, [src]overlay=w' @end example + +@item +Chain several overlays in cascade: +@example +nullsrc=s=200x200 [bg]; +testsrc=s=100x100, split=4 [in0][in1][in2][in3]; +[in0] lutrgb=r=0, [bg] overlay=0:0 [mid0]; +[in1] lutrgb=g=0, [mid0] overlay=100:0 [mid1]; +[in2] lutrgb=b=0, [mid1] overlay=0:100 [mid2]; +[in3] null, [mid2] overlay=100:100 [out0] +@end example + @end itemize @section pad |