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-rw-r--r--doc/filters.texi6
1 files changed, 6 insertions, 0 deletions
diff --git a/doc/filters.texi b/doc/filters.texi
index 6c5003f207..8f4dcea111 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -8526,6 +8526,12 @@ Float representation of @code{value} from metadata key.
@item VALUE2
Float representation of @code{value} as supplied by user in @code{value} option.
@end table
+
+@item file
+If specified in @code{print} mode, output is written to the named file. When
+filename equals "-" data is written to standard output.
+If @code{file} option is not set, output is written to the log with AV_LOG_INFO
+loglevel.
@end table
@subsection Examples