From cd374b05a5d602bf68aa07c38540463d8e49fa0b Mon Sep 17 00:00:00 2001 From: corey Date: Sun, 29 Jan 2006 19:56:35 +0000 Subject: [PATCH] More detailed description of brd_scale. git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@17507 b3059339-0415-0410-9bf9-f77b7e298cf2 --- DOCS/man/en/mplayer.1 | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/DOCS/man/en/mplayer.1 b/DOCS/man/en/mplayer.1 index e83887ff66..8124d39e79 100644 --- a/DOCS/man/en/mplayer.1 +++ b/DOCS/man/en/mplayer.1 @@ -6897,8 +6897,13 @@ option brd_scale. .TP .B brd_scale=<0\-10> Downscales frames for dynamic B-frame decision (default: 0). -Speed should increase by a factor of 4 every time brd_scale is increased -by 1. +Each time brd_scale is increased by one, the frame dimensions are +divided by two, which improves speed by a factor of four. +Both dimensions of the fully downscaled frame must be even numbers, so +brd_scale=1 requires the original dimensions to be multiples of four, +brd_scale=2 requires multiples of eight, etc. +In other words, the dimensions of the original frame must both be +divisible by 2^(brd_scale+1) with no remainder. . .TP .B bidir_refine=<0\-4>