Options in svndumpfilter are global, just as they are in svn and svnadmin:
If filtering causes any revision to be empty (i.e., causes no change to the repository), removes these revisions from the final dump file.
Renumbers revisions that remain after filtering.
Skips merge sources that have been removed as part of the filtering. Without this option, svndumpfilter will exit with an error if the merge source for a retained path is removed by filtering.
If all nodes in a revision are removed by filtering and
--drop-empty-revs is not passed, the default
behavior of svndumpfilter is to
remove all revision properties except for the date and the log
message (which will merely indicate that the revision is empty).
Passing this option will preserve existing revision properties
(which may or may not make sense, since the related content is no
longer present in the dump file).
Does not display filtering statistics.