Updated filters for Recoll
The following describe new and updated filters, which will be part of the next release, but can be installed on the current release if you need them.
For updated filters, you just need to copy the script to the filters directory which may be typically either /usr/share/recoll/filters, or /usr/local/share/recoll/filters. Please check that the script is executable after copying it, and make it so if needed (chmod a+x scriptname)
For new filters, you'll need to copy the script file as above, possibly install the supporting application, and usually edit the mimemap, mimeview and mimeconf files, either in the shared directory ( /usr[/local]/share/recoll/examples), or in your personal configuration directory ($HOME/.recoll or $RECOLL_CONFDIR).
There is a new rclepub filter for EPUB ebooks. It is new for all recoll versions before 1.18.0.
rclchm needs to be updated for all Recoll versions up to and including 1.17.1.
If you are running an older Recoll version, you really should upgrade.
Updated Open Document filter
The new filter will correctly handle exported Google Docs documents and also Open/LibreOffice ones in some cases. The previous filters concatenated all the text inside the exported Google docs without any spacing...
New rcltar filter for tar archives. The indexing of tar archives is disabled by default in the sample configuration (stored here). You'll need to add an application/x-tar = execm rcltar line in the [index] section of your $HOME/mimeconf to enable it.
By default, the current recoll version does not index xml content (except for known formats like dia, svg etc.). This new rclxml filter will extract the data from any xml file. Only text data is extracted, no attribute values. The other option is to treat xml file as plain text one (see comment in mimeconf), and index everything, including a lot of garbage.
rclchm. The previous version of the filter mishandled files which had encoded internal URLs (not very frequent, but happens).
rclokulnote. Okular lets you create annotations for PDF documents and stores them in xml format somewhere under ~/.kde. This filter does not do a nice job to format the data, but will at least let you find it...
rclgnm. Needs xsltproc and gunzip. As .gnumeric was in the list of explicitely ignored suffixes, you can't just add the mime and indexer script lines to your local mimemap and mimeconf, you also need to define recoll_noindex in the local mimemap (to override the system one which contains .gnumeric). The simplest approach may be to just replace the system files with those above.
Rar archive support
rclrar. This is up to date in Recoll 1.16.2 but may be added to Recoll 1.15. It needs the Python rarfile module.
This is based on the internal mail filter, you just need to download and install the configuration files (mimemap and mimeconf. Will only work with 1.15 and later.
Konqueror webarchive (.war) filter
Updated zip archive filter
The filter is corrected to handle utf-8 paths in zip archives: rclzip. Up to date in Recoll 1.16, but may be useful with Recoll 1.15
Updated audio tag filter
The mutagen-based rclaudio filter delivered with recoll 1.14.2 used a very recent mutagen interface which will only work with mutagen versions after 1.17 (probably. at least works with 1.19, doesn't with 1.15). You can download the corrected script here. Not useful with Recoll 1.5 or 1.6.