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Diffstat (limited to 'doc/filters.texi')
| -rw-r--r-- | doc/filters.texi | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index fa8f69be44..13cd99bc2a 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -1801,16 +1801,22 @@ the position in the file if known or -1 and the timestamp in seconds. In order to display the output lines, you need to set the loglevel at least to the AV_LOG_INFO value. -The filter accepts the syntax: -@example -blackframe[=@var{amount}:[@var{threshold}]] -@end example +The filter accepts parameters as a list of @var{key}=@var{value} +pairs, separated by ":". If the key of the first options is omitted, +the arguments are interpreted according to the syntax +blackframe[=@var{amount}[:@var{threshold}]]. -@var{amount} is the percentage of the pixels that have to be below the -threshold, and defaults to 98. +A description of the accepted options follows. + +@table @option +@item amount +Set the percentage of pixels that have to be below the +threshold to enable black detection. Default value is 98. -@var{threshold} is the threshold below which a pixel value is -considered black, and defaults to 32. +@item threshold +Set the threshold below which a pixel value is considered +black. Default value is 32. +@end table @section blend |