Gilbin,
Do you mean media-redirection using freerdp. If so, it’s similar as just using freerdp directly (https://github.com/FreeRDP/FreeRDP/wiki/Multimedia-Redirection), user just need to add option --xfreerdpOptions="--plugin drdynvc --data tsmf --" while setting up freerdp session. BTW, the remote desktop must support media-redirection for RDP protocol such as Windows 7 Enterprise version.