Hi, 2014-11-30 17:08 GMT+01:00 Michael Niedermayer <michae...@gmx.at>: > On Sun, Nov 30, 2014 at 02:45:54PM +0100, Christophe Gisquet wrote: > its the inverse of the amount, so smaller numbers should result in > more noise with 1 resulting in the maximum
True, the modulo means the smaller the value, the more frequent it happens. State isn't updated from that modulo, so indeed I've mistaken it for a seed. Hopefully, the attached patch addresses both the need for correct explanation as well as Lou's comment. -- Christophe
From 7e6cc5a8c82cde93c6138081cee634deca6d8378 Mon Sep 17 00:00:00 2001 From: Christophe Gisquet <christophe.gisq...@gmail.com> Date: Sun, 30 Nov 2014 11:59:22 +0100 Subject: [PATCH 4/4] noise_bsf: mention the parameter in the docs This looks more like a seed than an amount, as the variable name could lead to think. --- doc/bitstream_filters.texi | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/doc/bitstream_filters.texi b/doc/bitstream_filters.texi index 8124238..6431ce8 100644 --- a/doc/bitstream_filters.texi +++ b/doc/bitstream_filters.texi @@ -21,7 +21,8 @@ name after a '='. ffmpeg -i INPUT -c:v copy -bsf:v filter1[=opt1=str1/opt2=str2][,filter2] OUTPUT @end example -Below is a description of the currently available bitstream filters. +Below is a description of the currently available bitstream filters, +with their parameters, if any. @section aac_adtstoasc @@ -143,9 +144,16 @@ ffmpeg -i frame_%d.jpg -c:v copy rotated.avi Damages the contents of packets without damaging the container. Can be used for fuzzing or testing error resilience/concealment. +Parameters: +A numeral string, whose value is related to how often output bytes will +be modified. Therefore, values below or equal to 0 are forbidden, and +the lower the more frequent bytes will be modified, with 1 meaning +every byte is modified. + @example -ffmpeg -i INPUT -c copy -bsf noise output.mkv +ffmpeg -i INPUT -c copy -bsf noise[=1] output.mkv @end example +applies the modification to every byte. @section remove_extra -- 1.9.2.msysgit.0
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