diff options
Diffstat (limited to 'doc/filters.texi')
-rw-r--r-- | doc/filters.texi | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index 853d047998..0f1fd39a5e 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -1235,6 +1235,36 @@ a float number which specifies chroma temporal strength, defaults to @var{luma_tmp}*@var{chroma_spatial}/@var{luma_spatial} @end table +@section interlace + +Simple interlacing filter from progressive contents. This interleaves upper (or +lower) lines from odd frames with lower (or upper) lines from even frames, +halving the frame rate and preserving image height. + +@example + Original Original New Frame + Frame 'j' Frame 'j+1' (tff) + ========== =========== ================== + Line 0 --------------------> Frame 'j' Line 0 + Line 1 Line 1 ----> Frame 'j+1' Line 1 + Line 2 ---------------------> Frame 'j' Line 2 + Line 3 Line 3 ----> Frame 'j+1' Line 3 + ... ... ... +New Frame + 1 will be generated by Frame 'j+2' and Frame 'j+3' and so on +@end example + +It accepts the following optional parameters: + +@table @option +@item scan +determines whether the interlaced frame is taken from the even (tff - default) +or odd (bff) lines of the progressive frame. + +@item lowpass +Enable (default) or disable the vertical lowpass filter to avoid twitter +interlacing and reduce moire patterns. +@end table + @section lut, lutrgb, lutyuv Compute a look-up table for binding each pixel component input value |