From 35f5b481931082ee038e7c4742b9463c4d544eff Mon Sep 17 00:00:00 2001 From: rfelker Date: Wed, 11 Jun 2003 02:28:13 +0000 Subject: [PATCH] document vf_decimate git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@10280 b3059339-0415-0410-9bf9-f77b7e298cf2 --- DOCS/en/mplayer.1 | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/DOCS/en/mplayer.1 b/DOCS/en/mplayer.1 index 34606fbeef..2e1e2fb46e 100644 --- a/DOCS/en/mplayer.1 +++ b/DOCS/en/mplayer.1 @@ -2583,6 +2583,23 @@ This filter packs the planar 4:2:0 data into YUY2 (4:2:2) format with the chroma lines in their proper locations, so that in any given scanline, the luma and chroma data both come from the same field. .TP +.B decimate[=max:hi:lo:frac] +Drops frames that don't differ greatly from the previous frame in +order to reduce framerate. +The argument max (if positive) sets the maximum number of consecutive +frames which can be dropped, or (if negative) the minimum interval +between dropped frames. +A frame is a candidate for dropping if no 8x8 region differs by more +than a threshold of hi, and if not more than frac portion (1 meaning +the whole image) differs by more than a threshold of lo. +Values of hi and lo are for 8x8 pixel blocks and represent actual +pixel value differences, so a threshold of 64 corresponds to 1 unit of +difference for each pixel, or the same spread out differently over the +block. +The main use of this filter is for very-low-bitrate encoding (e.g. +streaming over dialup modem), but it could in theory be used for +fixing movies that were inverse-telecined incorrectly. +.TP .B dint[=sense:level] Detects and drops first of interlaced frames in video stream. Values can be from 0.0 to 1.0 - first (default 0.1) is relative difference