From 8997a0fa79cc4d20e78fd6f0de40f7127828978a Mon Sep 17 00:00:00 2001 From: Mark Himsley Date: Sun, 30 Dec 2012 15:02:16 +0100 Subject: lavfi/tinterlace: add low-pass-filter for top/bottom interleave modes Signed-off-by: Stefano Sabatini --- doc/filters.texi | 37 ++++++++++++++++++++++++++++++++++--- 1 file changed, 34 insertions(+), 3 deletions(-) (limited to 'doc') diff --git a/doc/filters.texi b/doc/filters.texi index 56add6badc..76e8fb53bb 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -4077,9 +4077,21 @@ Perform various types of temporal field interlacing. Frames are counted starting from 1, so the first input frame is considered odd. -This filter accepts a single option @option{mode} specifying the mode, -which can be specified either by specyfing @code{mode=VALUE} either -specifying the value alone. Available values are: +This filter accepts options in the form of @var{key}=@var{value} pairs +separated by ":". +Alternatively, the @var{mode} option can be specified as a value alone, +optionally followed by a ":" and further ":" separated @var{key}=@var{value} +pairs. + +A description of the accepted options follows. + +@table @option + +@item mode +Specify the mode of the interlacing. This option can also be specified +as a value alone. See below for a list of values for this option. + +Available values are: @table @samp @item merge, 0 @@ -4119,6 +4131,25 @@ compatibility reasons. Default mode is @code{merge}. +@item flags +Specify flags influencing the filter process. + +Available value for @var{flags} is: + +@table @option +@item low_pass_filter, vlfp +Enable vertical low-pass filtering in the filter. +Vertical low-pass filtering is required when creating an interlaced +destination from a progressive source which contains high-frequency +vertical detail. Filtering will reduce interlace 'twitter' and Moire +patterning. + +Vertical low-pass filtering can only be enabled for @option{mode} +@var{interleave_top} and @var{interleave_bottom}. + +@end table +@end table + @section transpose Transpose rows with columns in the input video and optionally flip it. -- cgit v1.2.3