Re: cx88_alsa - getting loud white noise with capture card.
Roman Gaufman <[email protected]>
| Newsgroups | gmane.comp.video.video4linux |
|---|---|
| Message-ID | <[email protected]> |
It sounds like I've not tuned the channel, but there is no channel - it's a capture card with 8 inputs. When I try to change channels with mplayer 'h' key, the sound changes slightly and I can hear it turn sound off and turn it back on. Is there a specific frequency I need to set? - I tried all channels available in mplayer and all I hear is loud static/white noise. Anyone? 2009/11/10 Roman Gaufman <[email protected]>: > Tried this again on 2.6.31-14 and still not able to get audio working. > Using this command: > > mplayer -vo null tv:// -tv > driver=v4l2:device=/dev/video1:alsa:adevice=hw.2,0:amode=1:audiorate=48000:forceaudio:volume=100:immediatemode=0:norm=PAL-BG:fps=25:input=0 > > Video works but getting nothing but loud static on audio. Please help :( > > > 2008/8/3 Roman Gaufman <[email protected]>: >> Hi, >> >> I have an 8 audio + 8 video PCI-Express Conexant 23881 DVR Card I'm >> trying to get working in Linux. >> >> The video channels all work flawlessly and the audio is recognized, >> but I just get very loud white noise no matter what I try. >> >> I tried the following commands and been googling for days to no avail: >> >> for i in 0 1 2 3 4 5 6 7; do /usr/bin/mencoder tv:// -tv >> driver=v4l2:device=/dev/video$i:alsa:adevice=hw.$i,0:amode=0:audiorate=32000:volume=100:immediatemode=0:norm=PAL-DK:input=0:width=720:height=576:outfmt=yuy2 >> -oac mp3lame -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=5000 -frames >> 300 -o test$i.avi & done >> >> for i in 0 1 2 3 4 5 6 7; do arecord -d 10 -D hw:$i,0 -c 2 -f S16_LE >> --period-size=65536 --buffer-size=524288 -r 48000 test$i.wav & done >> >> I had to boot the kernel with acpi=off irqpoll for video not to give >> me input/output errors, but audio still gives me loud white noise. >> >> The only error messages I see are: >> >> [ 3758.546252] cx88[4]/1: IRQ loop detected, disabling interrupts >> [ 3758.546323] cx88[4]: irq aud [0x1000] dn_sync* >> [ 3758.546329] cx88[4]: irq aud [0x1001] dn_risci1* dn_sync* >> >> My bios Plug & Play OS setting is set to no. >> >> This is what arecord -l returns: >> >> **** List of CAPTURE Hardware Devices **** >> card 0: CX8801_1 [Conexant CX8801], device 0: CX88 Digital [CX88 Digital] >> Subdevices: 1/1 >> Subdevice #0: subdevice #0 >> card 1: CX8801 [Conexant CX8801], device 0: CX88 Digital [CX88 Digital] >> Subdevices: 1/1 >> Subdevice #0: subdevice #0 >> card 2: CX8801_2 [Conexant CX8801], device 0: CX88 Digital [CX88 Digital] >> Subdevices: 1/1 >> Subdevice #0: subdevice #0 >> card 3: CX8801_3 [Conexant CX8801], device 0: CX88 Digital [CX88 Digital] >> Subdevices: 1/1 >> Subdevice #0: subdevice #0 >> card 4: CX8801_4 [Conexant CX8801], device 0: CX88 Digital [CX88 Digital] >> Subdevices: 1/1 >> Subdevice #0: subdevice #0 >> card 5: CX8801_5 [Conexant CX8801], device 0: CX88 Digital [CX88 Digital] >> Subdevices: 1/1 >> Subdevice #0: subdevice #0 >> card 6: CX8801_6 [Conexant CX8801], device 0: CX88 Digital [CX88 Digital] >> Subdevices: 1/1 >> Subdevice #0: subdevice #0 >> card 7: CX8801_7 [Conexant CX8801], device 0: CX88 Digital [CX88 Digital] >> Subdevices: 1/1 >> Subdevice #0: subdevice #0 >> >> This is what lspci -v returns (both with and without -n) >> >> - [ ] 04:07.0 Multimedia video controller: Conexant CX23880/1/2/3 PCI >> Video and Audio Decoder (rev 05) >> Subsystem: Unknown device c180:c980 >> Flags: bus master, medium devsel, latency 64, IRQ 19 >> Memory at d0000000 (32-bit, non-prefetchable) [size=16M] >> Capabilities: [44] Vital Product Data >> Capabilities: [4c] Power Management version 2 >> - [ ] 04:07.0 0400: 14f1:8800 (rev 05) >> Subsystem: c180:c980 >> Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- >> ParErr- Stepping- SERR- FastB2B- >> Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- >> <TAbort- <MAbort- >SERR- <PERR- >> Latency: 64 (5000ns min, 13750ns max), Cache Line Size: 32 bytes >> Interrupt: pin A routed to IRQ 19 >> Region 0: Memory at d0000000 (32-bit, non-prefetchable) >> [size=16M] >> Capabilities: [44] Vital Product Data >> Capabilities: [4c] Power Management version 2 >> Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA >> PME(D0-,D1-,D2-,D3hot-,D3cold-) >> Status: D0 PME-Enable- DSel=0 DScale=0 PME- >> >> - [ ] 04:07.1 Multimedia controller: Conexant CX23880/1/2/3 PCI Video >> and Audio Decoder [Audio Port] (rev 05) >> Subsystem: Unknown device c180:c980 >> Flags: bus master, medium devsel, latency 64, IRQ 19 >> Memory at d1000000 (32-bit, non-prefetchable) [size=16M] >> Capabilities: [4c] Power Management version 2 >> - [ ] 04:07.1 0480: 14f1:8801 (rev 05) >> Subsystem: c180:c980 >> Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- >> ParErr- Stepping- SERR- FastB2B- >> Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- >> <TAbort- <MAbort- >SERR- <PERR- >> Latency: 64 (1000ns min, 63750ns max), Cache Line Size: 32 bytes >> Interrupt: pin A routed to IRQ 19 >> Region 0: Memory at d1000000 (32-bit, non-prefetchable) >> [size=16M] >> Capabilities: [4c] Power Management version 2 >> Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA >> PME(D0-,D1-,D2-,D3hot-,D3cold-) >> Status: D0 PME-Enable- DSel=0 DScale=0 PME- >> >> Any ideas at all? >> > -- video4linux-list mailing list Unsubscribe mailto:[email protected]?subject=unsubscribe https://www.redhat.com/mailman/listinfo/video4linux-list