Record from USB Device

[Storken]

Hi there, I have a Dazzle DVC90 and I am trying to record an old video cassette.
However, I can't figure out how to record sound from it, video looks perfectly fine with mplayer and VLC.

dmesg | grep em28xx:

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em28xx: New device Pinnacle Systems GmbH DVC90 @ 480 Mbps (2304:0207, interface 0, class 0)
em28xx #0: chip ID is em2820 (or em2710)
em28xx #0: i2c eeprom 00: 1a eb 67 95 04 23 07 02 12 00 11 03 98 0e 6a 2e
em28xx #0: i2c eeprom 10: 00 00 06 57 4e 00 00 00 60 00 00 00 02 00 00 00
em28xx #0: i2c eeprom 20: 02 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00
em28xx #0: i2c eeprom 30: 00 00 20 40 20 80 02 20 10 01 00 00 00 00 00 00
em28xx #0: i2c eeprom 40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
em28xx #0: i2c eeprom 50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
em28xx #0: i2c eeprom 60: 00 00 00 00 00 00 00 00 00 00 2e 03 50 00 69 00
em28xx #0: i2c eeprom 70: 6e 00 6e 00 61 00 63 00 6c 00 65 00 20 00 53 00
em28xx #0: i2c eeprom 80: 79 00 73 00 74 00 65 00 6d 00 73 00 20 00 47 00
em28xx #0: i2c eeprom 90: 6d 00 62 00 48 00 00 00 0e 03 44 00 56 00 43 00
em28xx #0: i2c eeprom a0: 39 00 30 00 00 00 28 03 32 00 30 00 33 00 35 00
em28xx #0: i2c eeprom b0: 36 00 30 00 37 00 35 00 31 00 33 00 34 00 31 00
em28xx #0: i2c eeprom c0: 30 00 32 00 30 00 30 00 30 00 31 00 00 00 32 00
em28xx #0: i2c eeprom d0: 33 00 31 00 32 00 33 00 00 00 00 00 00 00 00 00
em28xx #0: i2c eeprom e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
em28xx #0: i2c eeprom f0: 00 00 00 00 00 00 00 00 0c 22 17 86 03 44 87 99
em28xx #0: EEPROM ID= 0x9567eb1a, EEPROM hash = 0x298d1592
em28xx #0: EEPROM info:
em28xx #0:   AC97 audio (5 sample rates)
em28xx #0:   300mA max power
em28xx #0:   Table at 0x06, strings=0x0e98, 0x2e6a, 0x0000
em28xx #0: Identified as Pinnacle Dazzle DVC 90/100/101/107 / Kaiser Baas Video to DVD maker / Kworld DVD Maker 2 (card=9)
saa7115 2-0025: saa7113 found (1f7113d0e100000) @ 0x4a (em28xx #0)
em28xx #0: Config register raw data: 0x12
em28xx #0: AC97 vendor ID = 0xffffffff
em28xx #0: AC97 features = 0x6a90
em28xx #0: Empia 202 AC97 audio processor detected
em28xx #0: v4l2 driver version 0.1.2
em28xx #0: V4L2 video device registered as video1
usbcore: registered new interface driver em28xx
em28xx driver loaded
Modules linked in: oss_usb oss_hdaudio osscore saa7115 em28xx v4l2_common ir_common videobuf_vmalloc videobuf_core ir_core tveeprom aes_i586 aes_generic sr_mod cdrom loop ipv6 nls_cp437 vfat fat arc4 btusb ecb bluetooth uvcvideo videodev v4l1_compat usbhid hid joydev ath9k ath9k_common mac80211 i915 drm_kms_helper ath9k_hw drm eeepc_laptop ath i2c_algo_bit iTCO_wdt sparse_keymap cfg80211 uhci_hcd rfkill i2c_core intel_agp video iTCO_vendor_support ehci_hcd battery ac pci_hotplug vhba led_class atl1e agpgart sg output button pcspkr processor thermal usbcore evdev psmouse serio_raw rtc_cmos rtc_core rtc_lib ext4 mbcache jbd2 crc16 sd_mod ata_piix pata_acpi ata_generic libata scsi_mod [last unloaded: osscore]

ossinfo -a -v3:

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Audio devices
HD Audio play pcm1                /dev/oss/oss_hdaudio0/pcm0  (device index 0)
    Legacy device /dev/dsp0
    Caps: DUPLEX TRIGGER MMAP
    Modes: IN/OUT
      Out engine  1: 0/HD Audio play pcm1
                     Available for use
      Engine      2: 4/HD Audio play pcm1 (vmix)
                     Available for use
      Engine      3: 5/HD Audio play pcm1 (vmix)
                     Available for use
      Engine      4: 6/HD Audio play pcm1 (vmix)
                     Available for use
      Engine      5: 7/HD Audio play pcm1 (vmix)
                     Available for use
    Input formats (0x00001010):
      AFMT_S16_LE   - 16 bit signed little endian
      AFMT_S32_LE   - 32 bit signed little endian
    Output formats (0x00001010):
      AFMT_S16_LE   - 16 bit signed little endian
      AFMT_S32_LE   - 32 bit signed little endian
    Device handle: PCI834a1043-0000:00:1b.0-au01
    Related mixer dev: 0
    Sample rate source: 0
    Preferred channel configuration: Not indicated
    Supported number of channels (min - max): 2 - 8
    Native sample rates (min - max): 44100 - 192000 (44100,48000,96000,192000)
    HW Type: Not indicated.
    Minimum latency: Not indicated

HD Audio play pcm2                /dev/oss/oss_hdaudio0/pcm1  (device index 1)
    Legacy device /dev/dsp1
    Caps: TRIGGER MMAP
    Modes: OUTPUT
      Out engine  1: 1/HD Audio play pcm2
                     Available for use
    Input formats (0x00001010):
      AFMT_S16_LE   - 16 bit signed little endian
      AFMT_S32_LE   - 32 bit signed little endian
    Output formats (0x00001010):
      AFMT_S16_LE   - 16 bit signed little endian
      AFMT_S32_LE   - 32 bit signed little endian
    Device handle: PCI834a1043-0000:00:1b.0-au02
    Related mixer dev: 0
    Sample rate source: 0
    Preferred channel configuration: Not indicated
    Supported number of channels (min - max): 2 - 2
    Native sample rates (min - max): 44100 - 192000 (44100,48000,96000,192000)
    HW Type: Not indicated.
    Minimum latency: Not indicated

HD Audio rec mix4                 /dev/oss/oss_hdaudio0/pcmin0  (device index 2)
    Legacy device /dev/dsp2
    Caps: DUPLEX TRIGGER MMAP
    Modes: IN/OUT
      In engine   1: 2/HD Audio rec mix4
                     Available for use
      Engine      2: 4/HD Audio play pcm1 (vmix)
                     Available for use
      Engine      3: 5/HD Audio play pcm1 (vmix)
                     Available for use
      Engine      4: 6/HD Audio play pcm1 (vmix)
                     Available for use
      Engine      5: 7/HD Audio play pcm1 (vmix)
                     Available for use
    Input formats (0x00001010):
      AFMT_S16_LE   - 16 bit signed little endian
      AFMT_S32_LE   - 32 bit signed little endian
    Output formats (0x00001010):
      AFMT_S16_LE   - 16 bit signed little endian
      AFMT_S32_LE   - 32 bit signed little endian
    Device handle: PCI834a1043-0000:00:1b.0-au03
    Related mixer dev: 0
    Sample rate source: 0
    Preferred channel configuration: Not indicated
    Supported number of channels (min - max): 2 - 2
    Native sample rates (min - max): 44100 - 96000 (44100,48000,96000)
    HW Type: Not indicated.
    Minimum latency: Not indicated

HD Audio rec select               /dev/oss/oss_hdaudio0/pcmin1  (device index 3)
    Legacy device /dev/dsp3
    Caps: TRIGGER MMAP
    Modes: INPUT 
      In engine   1: 3/HD Audio rec select
                     Available for use
    Input formats (0x00001010):
      AFMT_S16_LE   - 16 bit signed little endian
      AFMT_S32_LE   - 32 bit signed little endian
    Output formats (0x00001010):
      AFMT_S16_LE   - 16 bit signed little endian
      AFMT_S32_LE   - 32 bit signed little endian
    Device handle: PCI834a1043-0000:00:1b.0-au04
    Related mixer dev: 0
    Sample rate source: 0
    Preferred channel configuration: Not indicated
    Supported number of channels (min - max): 2 - 2
    Native sample rates (min - max): 44100 - 96000 (44100,48000,96000)
    HW Type: Not indicated.
    Minimum latency: Not indicated

(USB sound device rec              /dev/oss/usb23040207-1/pcmin0 ) (device index 4)
    Legacy device /dev/dsp4
    Caps: TRIGGER MMAP
    Modes: INPUT 
   ******* DEVICE NOT PLUGGED IN *******
    Input formats (0x00000010):
      AFMT_S16_LE   - 16 bit signed little endian
    Output formats (0x00000010):
      AFMT_S16_LE   - 16 bit signed little endian
    Device handle: USB-usb23040207-1-au01
    Related mixer dev: 1
    Sample rate source: 8
    Preferred channel configuration: STEREO
    Supported number of channels (min - max): 2 - 2
    Native sample rates (min - max): 44100 - 44100 (44100)
    HW Type: Not indicated.
    Minimum latency: Not indicated


Nodes
  /dev/dsp -> /dev/oss/oss_hdaudio0/pcm0
  /dev/dsp_in -> /dev/oss/oss_hdaudio0/pcm0
  /dev/dsp_out -> /dev/oss/oss_hdaudio0/pcm0
  /dev/dsp_mmap -> /dev/oss/oss_hdaudio0/pcm0
  /dev/dsp_multich -> /dev/oss/oss_hdaudio0/pcm0

So /dev/oss/usb23040207-1/pcmin0 is the device I'm looking for.
In ossxmix, I can adjust the device with rec-altset. It appears there as "USB sound device". However, when rec-altset is OFF and I'm trying to record from /dev/oss/usb23040207-1/pcmin0, it sais

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/dev/oss/usb23040207-1/pcmin0: Resource temporarily unavailable

If I set it to anything else than OFF (1 - 5 are possible), it complains with

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/dev/oss/usb23040207-1/pcmin0: Input/output error

So, the tape is running and it worked with ALSA the other day. What am I doing wrong?

[cesium]

USB recording is flaky with OSS4 and often doesn't work under Linux. You can try updating to latest OSS from mercurial which has this change which might help...

[Storken]

Still no luck, same problem on a mercurial compile.
Is it possible to do so with JACK?

[cesium]

JACK isn't a driver suit - so it won't help you.

[Storken]

it works now, thanks to this file cesium sent me:
http://www.fileupyours.com/files/77985/usb-diff.txt

for those who have to figure out how to use it (like me), you can patch the necessary files by executing

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patch -p1 < usb-diff.txt

in the root dir of the source code.

thanks a lot!