In case you are not following us on Twitter, you may have missed some of the news from yesterday. Basically all the essential (and new) tools we maintain supported webm from the date it was introduced.
- Haali's Media Splitter has been updated and can now demux and mux webm files within DirectShow programs (and maybe IE9?)
- mkvtoolnix can also mux and read webm files, either by using --webm in the command line or by using the .Webm extension.
- mkvalidator will tell you if the files you produce are valid webm files (v1 and v2)
- mkclean can clean webm files, remux them or even turn a webm file into matroska and vice versa (as long as the codec are VP8 and Vorbis)