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Diffstat (limited to 'doc/filters.texi')
| -rw-r--r-- | doc/filters.texi | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index 712e70833c..0b80fd116a 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -6682,7 +6682,12 @@ The time at which the filter is running, expressed in the local time zone. It can accept an argument: a strftime() format string. @item metadata -Frame metadata. It must take one argument specifying metadata key. +Frame metadata. Takes one or two arguments. + +The first argument is mandatory and specifies the metadata key. + +The second argument is optional and specifies a default value, used when the +metadata key is not found or empty. @item n, frame_num The frame number, starting from 0. |