Unsupported Transcoder Codecs

The following video codecs are currently unsupported by FFmpeg, and therefore can't be used as source videos.

RealVideo 8 and Up: Please make sure you have FFmpeg 0.5 or greater installed.

Windows Media Audio 9 Voice: This requires FFmpeg 0.6 or greater installed.  See notes below.
Windows Media Audio 9 Professional: This requires FFmpeg 0.6 or greater installed.  See notes below.
On2 VP8: This requires FFmpeg 0.6 or greater installed.

Windows Media Audio 9 Lossless: Unsupported.
On2 VP5: Unsupported.
On2 VP6: Unsupported.
On2 VP7: Unsupported.

This list will be updated as new versions of FFmpeg are released.

Which build of FFmpeg should I use?
Currently, we recommend you use FFmpeg 0.5 if you plan on using the system to watermark your videos.  FFmpeg 0.6's implementation of video watermarking is currently broken.

If you don't plan on using the system to watermark videos, we recommend FFmpeg 0.6.