What is it?
RealNetworks CDInfo Interface for RealMedia is part of RealPlayer, by RealNetworks, a cross-platform software product primarily used for the playing of recorded media. The media player is compatible with numerous formats within the multimedia realm, including MP3, MPEG-4, QuickTime, Windows Media, and multiple proprietary versions of RealAudio and RealVideo formats.
Description of tcdinfo.dll from RealNetworks
“RealPlayer plays more audio and video files than most other media players. And it’s free. No wonder it’s installed millions of times each month. For instance, you can download videos from thousands of websites with a single click. Transfer them to popular mobile phones and devices. Convert videos to various audio and video formats. Edit videos.”