[mythtv-users] Max number of DVB channels per usb tuner

[Mark Perkins]

Thanks everyone for the great responses. Am looking into it now and it looks promising.

>   dmesg | grep dvb
> [   10.662763] usbcore: registered new interface driver dvb_usb_af9015
> [   10.663089] usb 1-3: dvb_usb_v2: found a 'TwinHan AzureWave 
> AD-TU700(704J)' in warm state
> [   10.880631] usb 1-3: dvb_usb_v2: will pass the complete MPEG2 
> transport stream to the software demuxer
> 
> I use that device only when the PCI cards are already in use.  Project-X 
> often reports packets out of order from it, and also blocks of this:
> 
> [202034.369192] usb 1-3: dvb_usb_af9015: rc query failed=-71
> [202034.516313] usb 1-3: dvb_usb_v2: 2nd usb_bulk_msg() failed=-75
> 
> So... some are more equal than others.
> 
> John
> 

John, I get very similar messages from all my USB tuners. The rc query failed and usb_bulk_msg failed have always given me concern but I have never been able to put my finger on a problem that I can attribute to the errors so have let them go for now (that and I haven't been able to fix them...)

But I have also often noticed that when fine tuning commflag markers and moving frame-by-frame that the picture often seems to jump backwards / forwards in an odd fashion. Again nothing that I notice while actually watching recordings but again has given me concern that all is not well.

And then recently in digging into other problems I have noticed that when doing fifo transcodes with verbose all that mythtranscode seems to be continuously reordering packets.

I wonder if this all ties together to suggest that I have a deeper, more intrinsic problem with my usb tuners?
 		 	   		  
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