Tvheadend

Hi

I'm wondering if there's some way to speed up encrypted channels zapping. FTA chans zapping is really fast, but encrypted channels takes around 3 sec to tune in.

Perhaps using the same scheme as vdr-sc does with ecm caching is the way to go.
After you tune to a channel for the first time, vdr-sc pulls this information for a particular SID from the datastream , and stores the ecm information for that channel in this file. For quicker channel changing information, vdr-sc then recalls this information from the ecm.cache whenever you tune back to that particular channel at a later time---which makes the channel changes much quicker in subsequent tune-ins.

code is in sc/cam.c on the VDR-SC plugin

regards.