Pinnacle Linux image worse than Windows

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I just got my Pinnacle PCTV pro card working under Linux, but unfortunately 
the image quality is a lot worse than under Windows. I've experimented with 
various filter and deinterlacing settings in MPlayer, which helps a bit, but 
still the image is more noisy and not as crisp as under Windows.

Do I configure my drivers wrongly or is it some other software issue?

Thanks!

Peter

kernel 2.4.19-gentoo-r10

options bttv            card=52 radio=1 gbuffers=4 automute=0
options tuner           type=33

bttv: driver version 0.7.101 loaded
bttv: using 4 buffers with 2080k (8320k total) for capture
bttv: Host bridge is PCI device 8086:2560 (Intel Corp.)
bttv: Bt8xx card found (0).
PCI: Found IRQ 9 for device 02:0a.0
PCI: Sharing IRQ 9 with 02:0a.1
bttv0: Bt878 (rev 17) at 02:0a.0, irq: 9, latency: 32, mmio: 0xe6800000
bttv0: detected: Pinnacle PCTV [card=39], PCI subsystem ID is 11bd:0012
bttv0: using: BT878(Pinnacle PCTV Studio Pr) [card=52,insmod option]
i2c-algo-bit.o: Adapter: bt848 #0 scl: 1  sda: 1 -- testing...
i2c-algo-bit.o:1 scl: 1  sda: 0
i2c-algo-bit.o:2 scl: 1  sda: 1
i2c-algo-bit.o:3 scl: 0  sda: 1
i2c-algo-bit.o:4 scl: 1  sda: 1
i2c-algo-bit.o: bt848 #0 passed test.
tda9887: probing bt848 #0 i2c adapter [id=0x10005]
tda9887: chip found @ 0x86
bttv0: i2c attach [client=tda9887,ok]
i2c-core.o: client [tda9887] registered to adapter [bt848 #0](pos. 0).
msp34xx: init: chip=MSP3450G-B8, has NICAM support
msp3410: daemon started
bttv0: i2c attach [client=MSP3450G-B8,ok]
i2c-core.o: client [MSP3450G-B8] registered to adapter [bt848 #0](pos. 1).
i2c-dev.o: Registered 'bt848 #0' as minor 0
i2c-core.o: adapter bt848 #0 registered as adapter 0.
bttv0: i2c: checking for MSP34xx @ 0x80... found
bttv0: pinnacle/mt: id=2 info="PAL+SECAM / stereo" radio=yes
bttv0: using tuner=33
bttv0: i2c: checking for MSP34xx @ 0x80... found
bttv0: i2c: checking for TDA9875 @ 0xb0... not found
bttv0: i2c: checking for TDA7432 @ 0x8a... not found
i2c-core.o: driver i2c TV tuner driver registered.
tuner: probing bt848 #0 i2c adapter [id=0x10005]
tuner: chip found @ 0xc0
tuner(bttv): type forced to 33 (MT2032 universal) [insmod]
tuner: type already set (33)
bttv0: i2c attach [client=MT2032 universal,ok]
i2c-core.o: client [MT2032 universal] registered to adapter [bt848 #0](pos. 
2).
MT2032: Companycode=4d54 Part=04 Revision=04
bttv0: PLL: 28636363 => 35468950 ... ok
bttv0: registered device video0
bttv0: registered device vbi0
bttv0: registered device radio0





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