MPC - searching docs about mplayerc.ini tweaks

[LigH]

One user had problems playing RealMedia streams from URLs using Media Player Classic. Another one found that the "QT/Real Alternative" versions differ slightly in the mplayerc.ini file - they have a "\1" instead of "\0" after "[File formats] Real media file=...". And there are even \2 and \3, occasionally.

Is there an official documentation which covers the meaning of those added numbers?

[clsid]

\0 = DirectShow
\1 = RealMedia
\2 = QuickTime
\3 = Flash ???

Don't know if there are more.

[LigH]

Thank you much!