I'm just getting started with video on Linux, so my appologies if this is a FAQ -- I looked through the last couple of months archives and didn't find a solution :( My goal is to record video and audio from the TV card -- eventually from multiple TV cards. I have a Hauppage WinTV 190 labeled "NTSC 38101 rev B410." I'm using mencoder 0.90pre9-3.2 to grab and encode to MPEG4. If I use "/dev/dsp" which reads the audio from the sound card, the sound quality it fine. If I use "/dev/dsp2" which should be the "digital" output from the TV card, I get nothing -- it confuses mencoder and I have to kill the process. If I use "/dev/dsp3" which should be the "analog" output from the TV card I get really noisy audio. It sounds like something is "overdriving" something. I've tried fiddling with "aumix-minimal -d /dev/mixer1" which should control the output levels on the TV card, but it doesn't. I've tried fudging the channel frequency up and down in 0.1mHz increments without success. I've tried mencoder's "-tv" "volume" option which I hoped would control the output level, but it doesn't. How can I get sound from dsp2? How can I get "clean" sound from dsp3? Any clues will be greatly appreciated :) Here's some more (relevant?) details: uname -r: 2.4.19 mencoder command line using "dsp3:" /usr/local/bin/mencoder -endpos 60 -o t.avi -oac mp3lame\ -lameopts cbr:br=48 -ovc lavc\ -lavcopts keyint=300:vcodec=mpeg4:vhq:vqmax=31:vbitrate=500\ -sws 1 -vop scale=352:240,pp=tn/lb,crop=704:480:0:0\ -tv adevice=/dev/dsp3\ -tv chanlist=us-cable\ -tv channel=10\ -tv device=/dev/video0\ -tv driver=v4l\ -tv norm=NTSC\ -tv on\ -tv width=704:height=480\ -sws 1\ -vop scale=352:240,pp=tn/lb,crop=704:480:0:0 /etc/modules.conf: # # i2c alias char-major-89 i2c-dev options i2c-core i2c_debug=1 options i2c-algo-bit bit_test=1 # # bttv alias char-major-81 videodev alias char-major-81-0 bttv options bttv autoload=1 card=2 radio=0 tuner=2 options tuner debug=1 options tvmixer debug=1 devnr=1 options btaudio debug-2 # alias sound-slot-1 btaudio dmesg output: Linux video capture interface: v1.00 i2c-core.o: i2c core module i2c-algo-bit.o: i2c bit algorithm module bttv: driver version 0.7.91 loaded bttv: using 2 buffers with 2080k (4160k total) for capture bttv: Host bridge is VIA Technologies, Inc. VT82C693A/694x [Apollo PRO133x] bttv: Host bridge is VIA Technologies, Inc. VT82C596 Power Management bttv: Bt8xx card found (0). PCI: Enabling device 00:0b.0 (0004 -> 0006) PCI: Assigned IRQ 9 for device 00:0b.0 PCI: Sharing IRQ 9 with 00:0b.1 bttv0: Bt878 (rev 17) at 00:0b.0, irq: 9, latency: 32, memory: 0xe1000000 bttv0: detected: Hauppauge WinTV [card=10], PCI subsystem ID is 0070:13eb bttv0: using: BT878(Hauppauge (bt848)) [card=2,insmod option] bttv0: Hauppauge/Voodoo msp34xx: reset line init [5] 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. i2c-core.o: adapter bt848 #0 registered as adapter 0. bttv0: Hauppauge eeprom: model=38101, tuner=Philips FI1236 MK2 (2), radio=no bttv0: i2c: checking for MSP34xx @ 0x80... not found bttv0: i2c: checking for TDA9875 @ 0xb0... not found bttv0: i2c: checking for TDA7432 @ 0x8a... not found tvaudio: TV audio decoder + audio/video mux driver tvaudio: known chips: tda9840,tda9873h,tda9874h/a,tda9850,tda9855,tea6300,tea642 0,tda8425,pic16c54 (PV951) i2c-core.o: driver generic i2c audio driver registered. i2c-core.o: driver i2c TV tuner driver registered. tuner: probing bt848 #0 i2c adapter [id=0x10005] tuner: chip found @ 0xc2 tuner: type set to 2 (Philips NTSC) bttv0: i2c attach [client=Philips NTSC,ok] i2c-core.o: client [Philips NTSC] registered to adapter [bt848 #0](pos. 0). bttv0: registered device video0 bttv0: registered device vbi0 tuner: tv freq set to 139.25 btaudio: driver version 0.6 loaded [digital+analog] PCI: Found IRQ 9 for device 00:0b.1 PCI: Sharing IRQ 9 with 00:0b.0 btaudio: Bt878 (rev 17) at 00:0b.1, irq: 9, latency: 32, memory: 0xe0800000 btaudio: registered device dsp2 [digital] btaudio: registered device dsp3 [analog] btaudio: registered device mixer1 tuner: tv freq set to 193.25 Thanks in advance, ------------------------------------------------------------------------ Steve Edwards redhat.com@xxxxxxxxxxxx Voice: +1-760-468-3867 PST
