Merge commit '928061670e873e816daa14827853b7e11221ff5f'

[ffmpeg] / doc / filters.texi

diff --git a/doc/filters.texi b/doc/filters.texi
index 261fd2468219629a3e4d61dd9e06df607eed7f64..154508cfff135d556d703d442ca2412350412c50 100644 (file)
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -3303,8 +3303,10 @@ It accepts the following parameters:
 
 @item limit
 Set higher black value threshold, which can be optionally specified
-from nothing (0) to everything (255). An intensity value greater
-to the set value is considered non-black. It defaults to 24.
+from nothing (0) to everything (255 for 8bit based formats). An intensity
+value greater to the set value is considered non-black. It defaults to 24.
+You can also specify a value between 0.0 and 1.0 which will be scaled depending
+on the bitdepth of the pixel format.
 
 @item round
 The value which the width/height should be divisible by. It defaults to
@@ -5758,6 +5760,13 @@ Number of frames after which a given frame's contribution to the
 statistics is halved (i.e., it contributes only 0.5 to it's
 classification). The default of 0 means that all frames seen are given
 full weight of 1.0 forever.
+@item analyze_interlaced_flag
+When this is not 0 then idet will use the specified number of frames to determine
+if the interlaced flag is accurate, it will not count undetermined frames.
+If the flag is found to be accurate it will be used without any further
+computations, if it is found to be inaccuarte it will be cleared without any
+further computations. This allows inserting the idet filter as a low computational
+method to clean up the interlaced flag
 @end table
 
 @section il
@@ -6230,7 +6239,6 @@ The list of the currently supported filters follows:
 @item eq2
 @item eq
 @item ilpack
-@item pp7
 @item softpulldown
 @end table
 
@@ -7184,6 +7192,32 @@ pp=hb|y/vb|a
 @end example
 @end itemize
 
+@section pp7
+Apply Postprocessing filter 7. It is variant of the @ref{spp} filter,
+similar to spp = 6 with 7 point DCT, where only the center sample is
+used after IDCT.
+
+The filter accepts the following options:
+
+@table @option
+@item qp
+Force a constant quantization parameter. It accepts an integer in range
+0 to 63. If not set, the filter will use the QP from the video stream
+(if available).
+
+@item mode
+Set thresholding mode. Available modes are:
+
+@table @samp
+@item hard
+Set hard thresholding.
+@item soft
+Set soft thresholding (better de-ringing effect, but likely blurrier).
+@item medium
+Set medium thresholding (good results, default).
+@end table
+@end table
+
 @section psnr
 
 Obtain the average, maximum and minimum PSNR (Peak Signal to Noise
@@ -7317,6 +7351,38 @@ telecine NTSC input:
 ffmpeg -i input -vf pullup -r 24000/1001 ...
 @end example
 
+@section qp
+
+Change video quantization parameters (QP).
+
+The filter accepts the following option:
+
+@table @option
+@item qp
+Set expression for quantization parameter.
+@end table
+
+The expression is evaluated through the eval API and can contain, among others,
+the following constants:
+
+@table @var
+@item known
+1 if index is not 129, 0 otherwise.
+
+@item qp
+Sequentional index starting from -129 to 128.
+@end table
+
+@subsection Examples
+
+@itemize
+@item
+Some equation like:
+@example
+qp=2+2*sin(PI*qp)
+@end example
+@end itemize
+
 @section removelogo
 
 Suppress a TV station logo, using an image file to determine which