From 2f24290c8edd14262ee8a674a64b1223e1cbbf41 Mon Sep 17 00:00:00 2001 From: Anton Khirnov Date: Tue, 28 Mar 2023 11:48:50 +0200 Subject: fftools/ffmpeg: disable and deprecate -qphist This option adds a long string of numbers to the progress line, where i-th number contains the base-2 logarithm of the number of times a frame with this QP value was seen by print_report(). There are multiple problems with this feature: * despite this existing since 2005, web search shows no indication that it was ever useful for any meaningful purpose; * the format of what is printed is entirely undocumented, one has to find it out from the source code; * QP values above 31 are silently ignored; * it only works with one video stream; * as it relies on global state, it is in conflict with ongoing architectural changes. It then seems that the nontrivial cost of maintaining this option is not worth its negligible (or possibly negative - since it pollutes the already large option space) value. Users who really need similar functionality can also implement it themselves using -vstats. --- doc/ffmpeg.texi | 2 -- 1 file changed, 2 deletions(-) (limited to 'doc') diff --git a/doc/ffmpeg.texi b/doc/ffmpeg.texi index d433d60ce9..cb8aa13df2 100644 --- a/doc/ffmpeg.texi +++ b/doc/ffmpeg.texi @@ -1051,8 +1051,6 @@ Specify which version of the vstats format to use. Default is @code{2}. See the top=1/bottom=0/auto=-1 field first @item -vtag @var{fourcc/tag} (@emph{output}) Force video tag/fourcc. This is an alias for @code{-tag:v}. -@item -qphist (@emph{global}) -Show QP histogram @item -vbsf @var{bitstream_filter} Deprecated see -bsf -- cgit v1.2.1