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| -rw-r--r-- | doc/filters.texi | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index e5bf3a294f..485efcbe59 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -7026,6 +7026,21 @@ visible pattern for less banding, and higher value means less visible pattern at the cost of more banding. The option must be an integer value in the range [0,5]. Default is @var{2}. + +@item diff_mode +If set, define the zone to process + +@table @samp +@item rectangle +Only the changing rectangle will be reprocessed. This is similar to GIF +cropping/offsetting compression mechanism. This option can be useful for speed +if only a part of the image is changing, and has use cases such as limiting the +scope of the error diffusal @option{dither} to the rectangle that bounds the +moving scene (it leads to more deterministic output if the scene doesn't change +much, and as a result less moving noise and better GIF compression). +@end table + +Default is @var{none}. @end table @subsection Examples |