[FFmpeg-cvslog] doc/filters: restore entry for libvmaf option pool

[Gyan Doshi]

ffmpeg | branch: master | Gyan Doshi <ffmpeg at gyani.pro> | Sun Nov 26 16:21:22 2023 +0530| [0ea9e26636387336c48d6d20872ddd277479817b] | committer: Gyan Doshi

doc/filters: restore entry for libvmaf option pool

3d29724c00 removed the doc entry for the option pool while adding
a parser function for it at the same time!

The option remains available and undeprecated.

Fixes trac #10693

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=0ea9e26636387336c48d6d20872ddd277479817b
---

 doc/filters.texi | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/doc/filters.texi b/doc/filters.texi
index 5268b2003c..80ffbb2c65 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -16864,6 +16864,10 @@ Set the file path to be used to store log files.
 @item log_fmt
 Set the format of the log file (xml, json, csv, or sub).
 
+ at item pool
+Set the pool method to be used for computing vmaf.
+Options are @code{min}, @code{harmonic_mean} or @code{mean} (default).
+
 @item n_threads
 Set number of threads to be used when initializing libvmaf.
 Default value: @code{0}, no threads.