My build of -current is a few days old. I'm having problems recording
with aucat on a particular device.
The system has an integrated "Intel 82891DB AC97" audio chipset and has
three physical jacks: one output (headphone/hp) and two inputs
(mic/line-in). All the OpenBSD audio toys work perfectly with the
integrated device.
The system also has a "Logitech QuickCam Pro 9000" USB web cam and in
addition to the camera, it also contains a fairly limited audio device,
basically a cheap, mono microphone with a fixed frequency (16,000Hz).
The dmesg and output of `audioctl -f /dev/audio1` are at the end.
uvideo(4) /dev/video0
uaudio(4) /dev/audio1
With OpenBSD 4.4-Stable, I can record with the cheap microphone using
either ffmpeg or aucat but aucat on 4.4-stable requires user ('-u')
settings for the device to record properly.
recording
$ ffmpeg -f oss -ar 16000 -i /dev/audio1 out-ffmpeg-4.4.wav
$ aucat -u -c 0:0 -r 16000 -f /dev/audio1 -o out-aucat-4.4.wav
$ aucat -u -e u8 -c 0:0 -r 16000 -f /dev/audio1 -o test44.raw
playing
$ mplayer out-ffmpeg-4.4.wav
$ mplayer out-aucat-4.4.wav
$ aucat -u -e u8 -c 0:0 -r 16000 -i test44.raw
Doing the same tests above on OpenBSD 4.5-current shows both ffmpeg and
aucat no longer work for recording audio through the webcam mic. I'm
sure there is a rate/frequency problem (i.e. playing too fast), but
also there seems to be a lot of distortion.
Q: Could the ffmpeg record/playback issue be due to the use of 'oss' as
the format? And if so, is there a "better" choice for recording
formats with ffmpeg given the improvements in OpenBSD audio?
Yes, I know the easy answer is to just use the perfectly working
microphone in the integrated sound card on the main board (audio0), but
getting this funky, cheap microphone on the webcam working properly
with the new aucat seems useful... mainly because it worked fine with
4.4-stable, and the quirks of the device makes for a good test of aucat.
Without the "-u" switch on aucat(1), it will try to auto configure
itself, but on the cheap webcam microphone, aucat is ignoring the
number of channels (1) and ignoring the fixed rate (16,000Hz).
The most strange part of aucat on this microphone is the "-c" switch
channel control somehow effects speed. The default number of channels is
two (stereo) according to the man page for aucat, but the device itself
only has one channel.
Using the -c switch along with rate plays close to normal speed but with
lots of distortion.
$ aucat -d /dev/audio1 -u -e s16le -c 0:0 -r 16000 -o out-wcam.raw
$ aucat -u -e s16le -c 0:0 -r 16000 -i out-wcam.raw
But not using the -c switch plays far too fast (with distortion)
$ aucat -d /dev/audio1 -u -e s16le -r 16000 -o out-wcam.raw
$ aucat -u -e s16le -r 16000 -i out-wcam.raw
Q: I don't understand why/how the number of channels affects the rate?
If I turn on debugging and let aucat auto-configure itself (without
forcing the issue with the '-u' switch), you can see it's actually
trying to resample from 16000 to 441000Hz, but the resulting file plays
too fast and with lots of distortion.
$ aucat -f /dev/audio1 -o out-wcam-plain.raw
out-wcam-plain.raw: assuming headerless file
safile_new: using 5872(2936) fpb
file_new: sndio:hdl
dev_init: hw recording s16le,0:0,16000Hz
dev_init: using 8808 fpb
safile_start: play/rec started
file_new: wav:out-wcam-plain.raw
cmap_new: out-wcam-plain.raw: s16le,0:0,16000Hz -> s16le,0:1,44100Hz
resamp_new: 2936/8092
^Cdev_done: dev_mix = 0x0, dev_sub = 0x89665500
safile_stop: play/rec stopped
aproc_del: rpipe(hdl): terminating...
file_del: sndio:hdl <>: delayed
sub_hup: sub: eof
aproc_del: sub(sub): terminating...
aproc_del: resamp(out-wcam-plain.raw): terminating...
aproc_del: cmap(out-wcam-plain.raw): terminating...
aproc_del: wpipe(out-wcam-plain.raw): terminating...
file_del: wav:out-wcam-plain.raw <WOK>: immediate
aproc_del: wpipe(out-wcam-plain.raw): freed
aproc_del: cmap(out-wcam-plain.raw): freed
aproc_del: resamp(out-wcam-plain.raw): freed
aproc_del: sub(sub): freed
aproc_del: rpipe(hdl): has refs
file_del: sndio:hdl <>: immediate
aproc_del: rpipe(hdl): terminating...
aproc_del: rpipe(hdl): freed
I'm not sure what else I can test or try. If there is any further
information that might be useful, just let me know.
Kind Regards,
JCR
**********************************************************
$ audioctl -f /dev/audio1
name=USB audio
version=
config=uaudio
encodings=ulinear:8*,mulaw:8*,alaw:8*,slinear:8*,slinear_le:16,ulinear_le:16*,slinear_be:16*,ulinear_be:16*
properties=full_duplex,independent
full_duplex=0
fullduplex=0
blocksize=2288
hiwat=28
lowat=21
output_muted=0
monitor_gain=0
mode=record
play.rate=8000
play.channels=1
play.precision=8
play.encoding=mulaw
play.gain=127
play.balance=32
play.port=0x0
play.avail_ports=0x0
play.seek=0
play.samples=0
play.eof=0
play.pause=0
play.error=0
play.waiting=0
play.open=0
play.active=0
play.buffer_size=65536
play.block_size=2288
play.errors=0
record.rate=16000
record.channels=1
record.precision=8
record.encoding=mulaw
record.gain=127
record.balance=32
record.port=0x0
record.avail_ports=0x0
record.seek=0
record.samples=0
record.eof=0
record.pause=0
record.error=0
record.waiting=0
record.open=1
record.active=1
record.buffer_size=32768
record.block_size=1144
record.errors=0
**********************************************************
$ dmesg
OpenBSD 4.5-beta (GENERIC) #0: Thu Feb 19 19:32:43 PST 2009
j...@vid.foo.bar:/usr/src/sys/arch/i386/compile/GENERIC
cpu0: Intel(R) Pentium(R) 4 CPU 2.40GHz ("GenuineIntel" 686-class) 2.40
GHz cpu0:
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,SBF,CNXT-ID,xTPR
real mem = 2137550848 (2038MB) avail mem = 2058645504 (1963MB)
mainbus0 at root
bios0 at mainbus0: AT/286+ BIOS, date 04/17/03, BIOS32 rev. 0 @
0xfd844, SMBIOS rev. 2.31 @ 0xf0240 (51 entries) bios0: vendor IBM
version "24KT41AUS" date 04/17/2003 bios0: IBM 8310XXS
acpi0 at bios0: rev 0
acpi0: tables DSDT FACP TCPA APIC BOOT
acpi0: wakeup devices USB1(S3) USB2(S3) USB3(S3) USBE(S3) SLOT(S5) KBC_
(S3) COMA(S5) COMB(S5) acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: apic clock running at 132MHz
ioapic0 at mainbus0: apid 1 pa 0xfec00000, version 20, 24 pins
acpiprt0 at acpi0: bus 0 (PCI0)
acpiprt1 at acpi0: bus 2 (SLOT)
acpiprt2 at acpi0: bus -1 (AGP_)
acpicpu0 at acpi0
acpitz0 at acpi0: critical temperature 105 degC
acpibtn0 at acpi0: PWRB
bios0: ROM list: 0xc0000/0xb400 0xe0000/0x10000!
pci0 at mainbus0 bus 0: configuration mode 1 (bios)
pchb0 at pci0 dev 0 function 0 "Intel 82845G Host" rev 0x01
vga1 at pci0 dev 2 function 0 "Intel 82845G Video" rev 0x01
wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
intagp0 at vga1
agp0 at intagp0: aperture at 0x88000000, size 0x8000000
inteldrm0 at vga1: apic 1 int 16 (irq 11)
drm0 at inteldrm0
uhci0 at pci0 dev 29 function 0 "Intel 82801DB USB" rev 0x01: apic 1
int 16 (irq 11) uhci1 at pci0 dev 29 function 1 "Intel 82801DB USB" rev
0x01: apic 1 int 19 (irq 10) uhci2 at pci0 dev 29 function 2 "Intel
82801DB USB" rev 0x01: apic 1 int 18 (irq 5) ehci0 at pci0 dev 29
function 7 "Intel 82801DB USB" rev 0x01: apic 1 int 23 (irq 9) usb0 at
ehci0: USB revision 2.0 uhub0 at usb0 "Intel EHCI root hub" rev
2.00/1.00 addr 1 ppb0 at pci0 dev 30 function 0 "Intel 82801BA
Hub-to-PCI" rev 0x81 pci1 at ppb0 bus 2
fxp0 at pci1 dev 8 function 0 "Intel PRO/100 VE" rev 0x81, i82562: apic
1 int 20 (irq 11), address 00:09:6b:f3:41:ad inphy0 at fxp0 phy 1:
i82562EM 10/100 PHY, rev. 0 cbb0 at pci1 dev 10 function 0 "Ricoh 5C475
CardBus" rev 0x81: apic 1 int 22 (irq 9) cardslot0 at cbb0 slot 0 flags
0 cardbus0 at cardslot0: bus 3 device 0 cacheline 0x0, lattimer 0x20
pcmcia0 at cardslot0
ichpcib0 at pci0 dev 31 function 0 "Intel 82801DB LPC" rev 0x01
pciide0 at pci0 dev 31 function 1 "Intel 82801DB IDE" rev 0x01: DMA,
channel 0 configured to compatibility, channel 1 configured to
compatibility wd0 at pciide0 channel 0 drive 0: < 6Y250L6> wd0:
16-sector PIO, LBA48, 239372MB, 490234752 sectors wd0(pciide0:0:0):
using PIO mode 4, Ultra-DMA mode 5 atapiscsi0 at pciide0 channel 1
drive 0 scsibus0 at atapiscsi0: 2 targets
cd0 at scsibus0 targ 0 lun 0: <LITE-ON, LTR-48246S, SUS5> ATAPI 5/cdrom
removable wd1 at pciide0 channel 1 drive 1: <IC35L040AVER07-0>
wd1: 16-sector PIO, LBA, 39266MB, 80418240 sectors
cd0(pciide0:1:0): using PIO mode 4, Ultra-DMA mode 2
wd1(pciide0:1:1): using PIO mode 4, Ultra-DMA mode 5
ichiic0 at pci0 dev 31 function 3 "Intel 82801DB SMBus" rev 0x01: apic
1 int 17 (irq 9) iic0 at ichiic0
admtemp0 at iic0 addr 0x4c: adm1032
spdmem0 at iic0 addr 0x50: 1GB DDR SDRAM non-parity PC2700CL2.5
spdmem1 at iic0 addr 0x51: 1GB DDR SDRAM non-parity PC2700CL2.5
auich0 at pci0 dev 31 function 5 "Intel 82801DB AC97" rev 0x01: apic 1
int 17 (irq 9), ICH4 AC97 ac97: codec id 0x41445374 (Analog Devices
AD1981B) ac97: codec features headphone, 20 bit DAC, No 3D Stereo
audio0 at auich0
usb1 at uhci0: USB revision 1.0
uhub1 at usb1 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb2 at uhci1: USB revision 1.0
uhub2 at usb2 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb3 at uhci2: USB revision 1.0
uhub3 at usb3 "Intel UHCI root hub" rev 1.00/1.00 addr 1
isa0 at ichpcib0
isadma0 at isa0
com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
com1 at isa0 port 0x2f8/8 irq 3: ns16550a, 16 byte fifo
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pms0 at pckbc0 (aux slot)
pckbc0: using irq 12 for aux slot
wsmouse0 at pms0 mux 0
pcppi0 at isa0 port 0x61
midi0 at pcppi0: <PC speaker>
spkr0 at pcppi0
lpt0 at isa0 port 0x378/4 irq 7
npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16
fdc0 at isa0 port 0x3f0/6 irq 6 drq 2
fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec
mtrr: Pentium Pro MTRR support
uvideo0 at uhub0 port 6 configuration 1 interface 0 "Logitech QuickCam
Pro 9000" rev 2.00/0.08 addr 2 video0 at uvideo0
uaudio0 at uhub0 port 6 configuration 1 interface 2 "Logitech QuickCam
Pro 9000" rev 2.00/0.08 addr 2 uaudio0: audio rev 1.00, 2 mixer controls
audio1 at uaudio0
softraid0 at root
root on wd0a swap on wd0b dump on wd0b
auich0: measured ac97 link rate at 47765 Hz, will use 48000 Hz
video0 detached
uvideo0 detached
audio1 detached
uaudio0 detached
uvideo0 at uhub0 port 5 configuration 1 interface 0 "Logitech QuickCam
Pro 9000" rev 2.00/0.08 addr 2 video0 at uvideo0
uaudio0 at uhub0 port 5 configuration 1 interface 2 "Logitech QuickCam
Pro 9000" rev 2.00/0.08 addr 2 uaudio0: audio rev 1.00, 2 mixer controls
audio1 at uaudio0
--
J.C. Roberts
