Hello,
I am desperately trying to grab audio from TV, but nothing works. I am a *not so young* Unix sysadmin, but I don't know much about multimedia. Could somebody at least help me in finding clues ?
Tell me if I am not posting on the right list. Generally, I can find solutions on my own or with Google, but here I really don't now where to search ...
here are my technical configuration and tests :
(shortly)
Mandrake 10 on i686
kernel 2.6.3-16mdk
bttv0: using: Pinnacle PCTV Studio/Rave [card=39,autodetected]
the PCTV audio output is connected through an external wire to the audio line-input (on the motherboard)
(all tests performed without sound server, but starting artsd does not seem to change anything)
every TV viewer works (i.e., I can see and hear the TV within a window): xawtv, xawdecode, zapping, tvtime and mplayer
If I try to grab TV, I succeed in grabbing the video, but never the audio : tools used :
ffmpeg
xawdecode
mplayer
I read somewhere that the module btaudio could help : I loaded it with modprobe, but I still did not get the sound.
When I discovered lavrec (one hour ago) here is what I got :
[EMAIL PROTECTED] ~/tmp]$ lavrec tst.avi
**ERROR: [lavrec] Error initializing Audio: Audio task died. Reason: Error setting mono/stereo
++ WARN: [lavrec] Not ready for capture (state = 0)!
Press enter to start recording>Segmentation fault
[EMAIL PROTECTED] ~/tmp]$ lavrec -v 2 -R l -U tst.avi
INFO: [lavrec] Recording parameters:
INFO: [lavrec] Output format: AVI
INFO: [lavrec] Input Source: Auto detect
INFO: [lavrec] Decimation: 4
INFO: [lavrec] Quality: 50
INFO: [lavrec] Recording time: -1 sec
INFO: [lavrec]
INFO: [lavrec] MJPEG buffer size: 256 KB
INFO: [lavrec] # of MJPEG buffers: 64
INFO: [lavrec] Audio parameters:
INFO: [lavrec] Audio sample size: 16 bit
INFO: [lavrec] Audio sampling rate: 44100 Hz
INFO: [lavrec] Audio is MONO
INFO: [lavrec] Audio input recording level: Use mixer setting
INFO: [lavrec] Level of correction for Audio/Video synchronization:
INFO: [lavrec] Lost frame compensation and frame drop/insert
--DEBUG: [lavrec] Maximum size per file will be 1739 MB
INFO: [lavrec] Using read(2) system call for capture
**ERROR: [lavrec] Error initializing Audio: Audio task died. Reason: Error setting mono/stereo
++ WARN: [lavrec] Not ready for capture (state = 0)!
Press enter to start recording>Segmentation fault
Now, may the output of testec be of help ? (with or without btaudio loaded)
[EMAIL PROTECTED] ~/tmp]$ testrec -R l
Audio parameters:
Audio sample size: 16 bit
Audio sampling rate: 44100 Hz
Audio is MONO
Audio input recording level: 100 %
Don't mute audio output during recording
Recording source: l
Error: Error initializing Audio
Error: audio sample size not 8 or 16
[EMAIL PROTECTED] ~/tmp]$ testrec -a 8 -R l
Audio parameters:
Audio sample size: 8 bit
Audio sampling rate: 44100 Hz
Audio is MONO
Audio input recording level: 100 %
Don't mute audio output during recording
Recording source: l
Error: Error initializing Audio
Error: audio sample size not 8 or 16
here is the full dmesg listing from bttv :
bttv: driver version 0.9.12 loaded
bttv: using 4 buffers with 2080k (520 pages) each for capture
bttv: Bt8xx card found (0).
PCI: Found IRQ 5 for device 0000:02:09.0
PCI: Sharing IRQ 5 with 0000:00:1f.3
PCI: Sharing IRQ 5 with 0000:00:1f.5
PCI: Sharing IRQ 5 with 0000:02:09.1
bttv0: Bt878 (rev 17) at 0000:02:09.0, irq: 5, latency: 32, mmio: 0xe0000000
bttv0: detected: Pinnacle PCTV [card=39], PCI subsystem ID is 11bd:0012
bttv0: using: Pinnacle PCTV Studio/Rave [card=39,autodetected]
bttv0: gpio: en=00000000, out=00000000 in=00fff3ff [init]
bttv0: i2c: checking for MSP34xx @ 0x80... not found
bttv0: pinnacle/mt: id=4 info="PAL+SECAM / mono" radio=no
bttv0: using tuner=33
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,tea6420,tda8425,pic16c54 (PV951),ta8874z
tda9887: chip found @ 0x86
tuner: chip found @ 0xc0
tuner: type set to 33 (MT20xx universal)
tuner: microtune: companycode=4d54 part=04 rev=04
tuner: microtune MT2032 found, OK
bttv0: registered device video0
bttv0: registered device vbi0
bttv0: PLL: 28636363 => 35468950 .. ok
my sound chipset is ICH2 810 Chipset AC'97 Audio Controller : trying to configure artsd, it does not seem to support full-duplex (following a suggestion of the mplayer doc) I don't know whether it can be important ...
I perfomed all these tests using the sound card OSS driver - I changed to the Alsa driver (and rebooted), now artsd can be set to full-duplex, but I still cannot grab the audio, and testrec still outputs the same error ...
I hope that somebody could lead me towards the solution ...
Robert
