Freecom DVB-T stick - software demux

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Just wondered if I'm missing something here, my VDR setup is a single USB DVB-T receiver:

Bus 004 Device 003: ID 14aa:022b AVerMedia (again) or C&E

and I intend to use the streamdev-server plugin, but *almost* every time I try to call a stream, I get

Jun 2 10:04:37 telly vdr[29321]: Streamdev: Accepted new client (HTTP) 10.0.0.100:58530 Jun 2 10:04:37 telly vdr[29321]: ERROR: can't open filter handle on '/dev/dvb/adapter0/demux0' Jun 2 10:04:37 telly vdr[29321]: ERROR: /dev/dvb/adapter0/demux0: Too many open files Jun 2 10:04:37 telly vdr[29321]: ERROR (dvbdevice.c,650): Too many open files
Jun  2 10:04:37 telly vdr[29321]: ERROR: can't set PID 640 on device 1
Jun 2 10:04:37 telly vdr[29321]: ERROR (dvbdevice.c,665): Bad file descriptor

My VDR setup seems to open 8 demux connections, and I wondered if this is the cause of the error:

vdr 29321 root 5u CHR 212,4 620660 /dev/dvb/adapter0/demux0 vdr 29321 root 8u CHR 212,4 620660 /dev/dvb/adapter0/demux0 vdr 29321 root 9u CHR 212,4 620660 /dev/dvb/adapter0/demux0 vdr 29321 root 10u CHR 212,4 620660 /dev/dvb/adapter0/demux0 vdr 29321 root 11u CHR 212,4 620660 /dev/dvb/adapter0/demux0 vdr 29321 root 12u CHR 212,4 620660 /dev/dvb/adapter0/demux0 vdr 29321 root 13u CHR 212,4 620660 /dev/dvb/adapter0/demux0 vdr 29321 root 14u CHR 212,4 620660 /dev/dvb/adapter0/demux0

Is it possible to run this USB device in 'budget mode' where the full TS is passed onto a software demuxer rather than relying on a very limited hardware PID filter in the device?

The device is definitely connected to a USB2.0 port as evidenced by the dmesg output, but I can't find any facility to switch the device to pass a full TS :(

[43040343.800000] dvb-usb: found a 'WideView WT-220U PenType Receiver (based on ZL353)' in cold state, will try to load a firmware [43040343.840000] dvb-usb: downloading firmware from file 'dvb-usb-wt220u-zl0353-01.fw'

[output from other drivers snipped]...

[43040345.030000] usb 4-1: USB disconnect, address 5
[43040345.030000] dvb-usb: generic DVB-USB module successfully deinitialized and disconnected. [43040346.060000] usb 4-1: new high speed USB device using ehci_hcd and address 6 [43040346.210000] dvb-usb: found a 'WideView WT-220U PenType Receiver (based on ZL353)' in warm state. [43040346.210000] dvb-usb: will use the device's hardware PID filter (table count: 15). [43040346.210000] DVB: registering new adapter (WideView WT-220U PenType Receiver (based on ZL353)).
[43040346.210000] attaching frontend dtt200u
[43040346.210000] DVB: registering frontend 0 (WideView USB DVB-T)...
[43040346.210000] input: IR-receiver inside an USB DVB receiver as /class/input/input9
[43040346.210000] dvb-usb: schedule remote query interval to 300 msecs.
[43040346.210000] dvb-usb: WideView WT-220U PenType Receiver (based on ZL353) successfully initialized and connected.
[43040348.510000] dvb-usb: recv bulk message failed: -110
[43040348.520000] key: 98 0 0 0 e1

Cheers,
Gavin.

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