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gradfun: add notice from the MPlayer manual 

Add notice telling that the filter is designed for playback only.
This commit is contained in:
Stefano Sabatini 2011-03-30 00:15:34 +02:00
parent 2ccbb3428b
commit da3534b01e
1 changed files with 4 additions and 0 deletions
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doc/filters.texi
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@ -585,6 +585,10 @@ regions by truncation to 8bit colordepth.
Interpolate the gradients that should go where the bands are, and
dither them.
This filter is designed for playback only. Do not use it prior to
lossy compression, because compression tends to lose the dither and
bring back the bands.
The filter takes two optional parameters, separated by ':':
@var{strength}:@var{radius}