Buffer overflows recording HDTV with saa7146 and mantis DVB-C tuners

> Hello,
> 
> I've build a new VDR with h.264 xineliboutput plugin software decoding
> 
> and got a problem now with
> 
> buffer overruns and distorted recordings on all HD channels:
> 
> ...
> Nov  5 05:32:03 vdr2 vdr: [32753] ERROR: 47231 ring buffer overflows (8879240 bytes dropped)
> Nov  5 05:32:09 vdr2 vdr: [32753] ERROR: 31042 ring buffer overflows (5835896 bytes dropped)
> Nov  5 05:32:15 vdr2 vdr: [32753] ERROR: 47325 ring buffer overflows (8897100 bytes dropped)
> Nov  5 05:32:21 vdr2 vdr: [32753] ERROR: 28306 ring buffer overflows (5321528 bytes dropped)
> Nov  5 05:32:27 vdr2 vdr: [32753] ERROR: 14033 ring buffer overflows (2638204 bytes dropped)
> ...
> 
> This occurs with both saa7146 and mantis pci tuner cards.
> 
> This has not occured with the old VDR system using Broadcomm's crystalhd decoder in libxine.
> 
> LIVE TV works fine.
> 
> I've tried stable and testing minidvblinux.de VDR live systems to crosscheck, but same issue occurs.
> 
> If I increase the buffer for the saa7164 cards with module parameter it's getting worse and distorted picture and sound.
> 
> Any Ideas?
> 
> Increase VDR's buffer in source code?
> 
> What is the correct driver module debug parameter to provide a useful debog log?
> 
> Y
> tom
> 
> 

Not a DVB drivers or hardware issue.

Good old Kaffeine DVB app recordings are OK, no distorted stream.

VDR BUG!

y
tom