Getting "Unknown em28xx video grabber" to work?

Mikko Rauhala

author

2008-12-11 00:00 UTC #0 lore raw

Hello

I just noticed that my external LG DVD drive, which happens to have video input, is actually recognized by Ubuntu 8.10's kernel as a v4l device:

[   58.236269] em28xx #0: V4L2 device registered as /dev/video0
and /dev/vbi0
[   58.236272] em28xx #0: Found Unknown EM2750/28xx video grabber
[   58.236350] em28xx audio device (eb1a:2861): interface 1, class 1
[...]
[   11.640274] scsi 6:0:0:0: CD-ROM            HL-DT-ST DVD-RAM GSA-E20N

1.03 PQ: 0 ANSI: 0

Now, it could be handy sometimes to get some video input in through there, so I tried it with my pocket cam's video output (which hopefully works itself...). Nothing worked, in the end, getting blackness or sometimes blackness with the bottom of the screen including green lines (that with streamer -n pal -s 720x576 -o foo.ppm). cat /dev/video0, like other ways to try to access the device, do light up an access led on the drive.

Is there some idiot-proof way to see if it can be set up properly to receive video or is there just no support for this particular thing? I've not much experience with v4l, but see below for some stuff I tried.

mjr@phantom:~$ xawtv
This is xawtv-3.95.dfsg.1, running on Linux/x86_64 (2.6.27-9-generic)
xinerama 0: 1920x1200+1920+0
xinerama 1: 1920x1200+0+0
WARNING: No DGA direct video mode for this display.
/dev/video0 [v4l2]: no overlay support
v4l-conf had some trouble, trying to continue anyway
Warning: Cannot convert string
"-*-ledfixed-medium-r-*--39-*-*-*-c-*-*-*" to type FontStruct
ioctl: VIDIOC_S_INPUT(int=0): Invalid argument

mjr@phantom:~$ v4lctl -c /dev/video0 setinput Composite
invalid value for input: Composite
valid choices for "input":

(Yes, there's nothing there for valid choices.)

mjr@phantom:~$ dov4l -q
dov4l v0.9, (C) 2003-2006 by [email protected]

Canonical name for this interface: Unknown EM2750/28xx video grabb Type of interface:
Can capture to memory

Number of radio/tv channels if appropriate: 0
Number of audio devices if appropriate: 0
Maximum capture width in pixels: 720
Maximum capture height in pixels: 576
Minimum capture width in pixels: 48
Minimum capture height in pixels: 32

Image size (x,y): 720, 576

Brightness: 32896
Hue: 32896
Colour: 32896
Contrast: 32896
Whiteness: 0
Depth: 16
Palette: Describe me

mjr@phantom:~$ mplayer tv://
MPlayer 1.0rc2-4.3.2 (C) 2000-2007 MPlayer Team
CPU: AMD Athlon(tm) 64 X2 Dual Core Processor 4400+ (Family: 15, Model:
35, Stepping: 2)
CPUflags:  MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 1 SSE2: 1
Compiled with runtime CPU detection.
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote
control.

Playing tv://.
TV file format detected.
Selected driver: v4l2
name: Video 4 Linux 2 input
author: Martin Olschewski <[email protected]>
comment: first try, more to come ;-)
Selected device: Unknown EM2750/28xx video grabb
Capabilites: video capture audio read/write streaming supported norms: 0 = NTSC; 1 = NTSC-M; 2 = NTSC-M-JP; 3 = NTSC-M-KR; 4
= NTSC-443; 5 = PAL; 6 = PAL-BG; 7 = PAL-H; 8 = PAL-I; 9 = PAL-DK; 10 = PAL-M; 11 = PAL-N; 12 = PAL-Nc; 13 = PAL-60; 14 = SECAM; 15 = SECAM-B; 16 = SECAM-G; 17 = SECAM-H; 18 = SECAM-DK; 19 = SECAM-L; 20 = SECAM-Lc;
inputs:
Current input: 0
Current format: YUYV
v4l2: ioctl enum input failed: Invalid argument
Selected input hasn't got a tuner!
xscreensaver_disable: Could not find XScreenSaver window. GNOME screensaver disabled
==========================================================================
Opening video decoder: [raw] RAW Uncompressed Video
VDec: vo config request - 640 x 480 (preferred colorspace: Packed YUY2)
VDec: using Packed YUY2 as output csp (no 0)
Movie-Aspect is undefined - no prescaling applied.
VO: [xv] 640x480 => 640x480 Packed YUY2
Selected video codec: [rawyuy2] vfm: raw (RAW YUY2)
==========================================================================
Audio: no sound
Starting playback...
^C

mjr@phantom:~$ cat /dev/video0 | od -x
0000000 8010 8010 8010 8010 8010 8010 8010 8010
*
^C
mjr@phantom:~$ cat /dev/video0 | od -x
[...]
3075400 0000 0000 0000 0000 0000 0000 0000 0000
*
3100240 8010 8010 8010 8010 8010 8010 8010 8010
*
3103100 0000 0000 0000 0000 0000 0000 0000 0000
*
3105740 8010 8010 8010 8010 8010 8010 8010 8010
[...]

And so forth; any suggestions?

Signature · 10 lines

Mikko Rauhala <[email protected]>       - http://www.iki.fi/mjr/blog/  
The Finnish Pirate Party         - http://piraattipuolue.fi/  
World Transhumanist Association  - http://transhumanism.org/  
Singularity Institute            - http://singinst.org/  


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Ben Klein

2008-12-11 01:09 UTC #1 lore raw

I've personally had a lot of trouble with xawtv and mplayer. I use tvtime as my v4l viewing program (and playing around with vlc).

If you can find the vendor and product id's for the video capture component of the DVD drive, that's probably going to be useful for the v4l devs :) You should be able to identify the device with lsusb.

It may also be helpful to describe what A/V connections the DVD drive has (composite, svideo, etc).

2008/12/11 Mikko Rauhala <[email protected]>:

Quoted 133 lines

Hello
I just noticed that my external LG DVD drive, which happens to have video input, is actually recognized by Ubuntu 8.10's kernel as a v4l device:
[   58.236269] em28xx #0: V4L2 device registered as /dev/video0
and /dev/vbi0
[   58.236272] em28xx #0: Found Unknown EM2750/28xx video grabber
[   58.236350] em28xx audio device (eb1a:2861): interface 1, class 1
[...]
[   11.640274] scsi 6:0:0:0: CD-ROM            HL-DT-ST DVD-RAM GSA-E20N
1.03 PQ: 0 ANSI: 0
Now, it could be handy sometimes to get some video input in through there, so I tried it with my pocket cam's video output (which hopefully works itself...). Nothing worked, in the end, getting blackness or sometimes blackness with the bottom of the screen including green lines (that with streamer -n pal -s 720x576 -o foo.ppm). cat /dev/video0, like other ways to try to access the device, do light up an access led on the drive.
Is there some idiot-proof way to see if it can be set up properly to receive video or is there just no support for this particular thing? I've not much experience with v4l, but see below for some stuff I tried.
mjr@phantom:~$ xawtv
This is xawtv-3.95.dfsg.1, running on Linux/x86_64 (2.6.27-9-generic)
xinerama 0: 1920x1200+1920+0
xinerama 1: 1920x1200+0+0
WARNING: No DGA direct video mode for this display.
/dev/video0 [v4l2]: no overlay support
v4l-conf had some trouble, trying to continue anyway
Warning: Cannot convert string
"-*-ledfixed-medium-r-*--39-*-*-*-c-*-*-*" to type FontStruct
ioctl: VIDIOC_S_INPUT(int=0): Invalid argument
mjr@phantom:~$ v4lctl -c /dev/video0 setinput Composite
invalid value for input: Composite
valid choices for "input":
(Yes, there's nothing there for valid choices.)
mjr@phantom:~$ dov4l -q
dov4l v0.9, (C) 2003-2006 by [email protected]
Canonical name for this interface: Unknown EM2750/28xx video grabb Type of interface:
Can capture to memory
Number of radio/tv channels if appropriate: 0
Number of audio devices if appropriate: 0
Maximum capture width in pixels: 720
Maximum capture height in pixels: 576
Minimum capture width in pixels: 48
Minimum capture height in pixels: 32
Image size (x,y): 720, 576
Brightness: 32896
Hue: 32896
Colour: 32896
Contrast: 32896
Whiteness: 0
Depth: 16
Palette: Describe me
mjr@phantom:~$ mplayer tv://
MPlayer 1.0rc2-4.3.2 (C) 2000-2007 MPlayer Team
CPU: AMD Athlon(tm) 64 X2 Dual Core Processor 4400+ (Family: 15, Model:
35, Stepping: 2)
CPUflags:  MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 1 SSE2: 1
Compiled with runtime CPU detection.
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote
control.
Playing tv://.
TV file format detected.
Selected driver: v4l2
name: Video 4 Linux 2 input
author: Martin Olschewski <[email protected]>
comment: first try, more to come ;-)
Selected device: Unknown EM2750/28xx video grabb
Capabilites: video capture audio read/write streaming supported norms: 0 = NTSC; 1 = NTSC-M; 2 = NTSC-M-JP; 3 = NTSC-M-KR; 4
= NTSC-443; 5 = PAL; 6 = PAL-BG; 7 = PAL-H; 8 = PAL-I; 9 = PAL-DK; 10 = PAL-M; 11 = PAL-N; 12 = PAL-Nc; 13 = PAL-60; 14 = SECAM; 15 = SECAM-B; 16 = SECAM-G; 17 = SECAM-H; 18 = SECAM-DK; 19 = SECAM-L; 20 = SECAM-Lc;
inputs:
Current input: 0
Current format: YUYV
v4l2: ioctl enum input failed: Invalid argument
Selected input hasn't got a tuner!
xscreensaver_disable: Could not find XScreenSaver window. GNOME screensaver disabled
==========================================================================
Opening video decoder: [raw] RAW Uncompressed Video
VDec: vo config request - 640 x 480 (preferred colorspace: Packed YUY2)
VDec: using Packed YUY2 as output csp (no 0)
Movie-Aspect is undefined - no prescaling applied.
VO: [xv] 640x480 => 640x480 Packed YUY2
Selected video codec: [rawyuy2] vfm: raw (RAW YUY2)
==========================================================================
Audio: no sound
Starting playback...
^C
mjr@phantom:~$ cat /dev/video0 | od -x
0000000 8010 8010 8010 8010 8010 8010 8010 8010
*
^C
mjr@phantom:~$ cat /dev/video0 | od -x
[...]
3075400 0000 0000 0000 0000 0000 0000 0000 0000
*
3100240 8010 8010 8010 8010 8010 8010 8010 8010
*
3103100 0000 0000 0000 0000 0000 0000 0000 0000
*
3105740 8010 8010 8010 8010 8010 8010 8010 8010
[...]
And so forth; any suggestions?
--
Mikko Rauhala <[email protected]>       - http://www.iki.fi/mjr/blog/
The Finnish Pirate Party         - http://piraattipuolue.fi/
World Transhumanist Association  - http://transhumanism.org/
Singularity Institute            - http://singinst.org/

Quoted 5 lines

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Mikko Rauhala

author

2008-12-11 10:56 UTC #2 lore raw

to, 2008-12-11 kello 12:08 +1100, Ben Klein kirjoitti:

Quoted 2 lines

I've personally had a lot of trouble with xawtv and mplayer. I use tvtime as my v4l viewing program (and playing around with vlc).

tvtime complains "No inputs available" on /dev/video0, consistent with when I tried to set the input manually.

Quoted 3 lines

If you can find the vendor and product id's for the video capture component of the DVD drive, that's probably going to be useful for the v4l devs :) You should be able to identify the device with lsusb.

Ah, the earlier the em28xx init (which I frankly just overlooked there) says among other things "Your board has no unique USB ID and thus need a hint to be detected":

[   54.945777] em28xx v4l2 driver version 0.1.0 loaded
[   54.946119] em28xx new video device (eb1a:2861): interface 0, class 255
[   54.946124] em28xx Has usb audio class
[   54.946126] em28xx #0: Alternate settings: 8
[   54.946128] em28xx #0: Alternate setting 0, max size= 0
[   54.946130] em28xx #0: Alternate setting 1, max size= 0
[   54.946132] em28xx #0: Alternate setting 2, max size= 1448
[   54.946134] em28xx #0: Alternate setting 3, max size= 2048
[   54.946136] em28xx #0: Alternate setting 4, max size= 2304
[   54.946137] em28xx #0: Alternate setting 5, max size= 2580
[   54.946139] em28xx #0: Alternate setting 6, max size= 2892
[   54.946141] em28xx #0: Alternate setting 7, max size= 3072
[   54.946535] em28xx #0: chip ID is em2860
[   55.022407] dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer.
[   55.237669] em28xx #0: found i2c device @ 0xb8 [tvp5150a]
[   55.251924] em28xx #0: Your board has no unique USB ID and thus need a hint to be detected.
[   55.251929] em28xx #0: You may try to use card=<n> insmod option to workaround that.
[   55.251931] em28xx #0: Please send an email with this log to:
[   55.251933] em28xx #0: 	V4L Mailing List <[email protected]>
[   55.251935] em28xx #0: Board eeprom hash is 0x00000000
[   55.251936] em28xx #0: Board i2c devicelist hash is 0x77800080
[   55.251938] em28xx #0: Here is a list of valid choices for the card=<n> insmod option:
[   55.251941] em28xx #0:     card=0 -> Unknown EM2800 video grabber
[   55.251943] em28xx #0:     card=1 -> Unknown EM2750/28xx video grabber

[...]

Here's the relevant lsusb as far as I can see:

Bus 001 Device 009: ID eb1a:2861 eMPIA Technology, Inc. Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00

  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0xeb1a eMPIA Technology, Inc.
  idProduct          0x2861 
  bcdDevice            1.00
  iManufacturer           0 
  iProduct                0 
  iSerial                 0 
  bNumConfigurations      1

Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 555
bNumInterfaces 3
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 255
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0001 1x 1 bytes
bInterval 11
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0000 1x 0 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0000 1x 0 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 1
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 255
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0001 1x 1 bytes
bInterval 11
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0000 1x 0 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0000 1x 0 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 2
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 255
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0001 1x 1 bytes
bInterval 11
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0ad4 2x 724 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0000 1x 0 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 3
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 255
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0001 1x 1 bytes
bInterval 11
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0c00 2x 1024 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0000 1x 0 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 4
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 255
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0001 1x 1 bytes
bInterval 11
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x1300 3x 768 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0000 1x 0 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 5
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 255
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0001 1x 1 bytes
bInterval 11
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x135c 3x 860 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0000 1x 0 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 6
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 255
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0001 1x 1 bytes
bInterval 11
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x13c4 3x 964 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0000 1x 0 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 7
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 255
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0001 1x 1 bytes
bInterval 11
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x1400 3x 1024 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0000 1x 0 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 1 Audio
bInterfaceSubClass 1 Control Device
bInterfaceProtocol 0
iInterface 0
AudioControl Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 1 (HEADER)
bcdADC 1.00
wTotalLength 39
bInCollection 1
baInterfaceNr( 0) 2
AudioControl Interface Descriptor:
bLength 12
bDescriptorType 36
bDescriptorSubtype 2 (INPUT_TERMINAL)
bTerminalID 1
wTerminalType 0x0603 Line Connector
bAssocTerminal 0
bNrChannels 2
wChannelConfig 0x0003
Left Front (L)
Right Front (R)
iChannelNames 0
iTerminal 0
AudioControl Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 6 (FEATURE_UNIT)
bUnitID 2
bSourceID 1
bControlSize 1
bmaControls( 0) 0x03
Mute
Volume
bmaControls( 1) 0x00
iFeature 0
AudioControl Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 3 (OUTPUT_TERMINAL)
bTerminalID 3
wTerminalType 0x0101 USB Streaming
bAssocTerminal 0
bSourceID 2
iTerminal 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 0
iInterface 0
AudioStreaming Interface Descriptor:
bLength 7
bDescriptorType 36
bDescriptorSubtype 1 (AS_GENERAL)
bTerminalLink 3
bDelay 1 frames
wFormatTag 1 PCM
AudioStreaming Interface Descriptor:
bLength 11
bDescriptorType 36
bDescriptorSubtype 2 (FORMAT_TYPE)
bFormatType 1 (FORMAT_TYPE_I)
bNrChannels 2
bSubframeSize 2
bBitResolution 16
bSamFreqType 1 Discrete
tSamFreq[ 0] 0
Endpoint Descriptor:
bLength 9
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0000 1x 0 bytes
bInterval 4
bRefresh 0
bSynchAddress 0
AudioControl Endpoint Descriptor:
bLength 7
bDescriptorType 37
bDescriptorSubtype 1 (EP_GENERAL)
bmAttributes 0x00
bLockDelayUnits 0 Undefined
wLockDelay 0 Undefined
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 1
bNumEndpoints 1
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 0
iInterface 0
AudioStreaming Interface Descriptor:
bLength 7
bDescriptorType 36
bDescriptorSubtype 1 (AS_GENERAL)
bTerminalLink 3
bDelay 1 frames
wFormatTag 1 PCM
AudioStreaming Interface Descriptor:
bLength 11
bDescriptorType 36
bDescriptorSubtype 2 (FORMAT_TYPE)
bFormatType 1 (FORMAT_TYPE_I)
bNrChannels 2
bSubframeSize 2
bBitResolution 16
bSamFreqType 1 Discrete
tSamFreq[ 0] 48000
Endpoint Descriptor:
bLength 9
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x00c4 1x 196 bytes
bInterval 4
bRefresh 0
bSynchAddress 0
AudioControl Endpoint Descriptor:
bLength 7
bDescriptorType 37
bDescriptorSubtype 1 (EP_GENERAL)
bmAttributes 0x00
bLockDelayUnits 0 Undefined
wLockDelay 0 Undefined
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 2
bNumEndpoints 1
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 0
iInterface 0
AudioStreaming Interface Descriptor:
bLength 7
bDescriptorType 36
bDescriptorSubtype 1 (AS_GENERAL)
bTerminalLink 3
bDelay 1 frames
wFormatTag 1 PCM
AudioStreaming Interface Descriptor:
bLength 11
bDescriptorType 36
bDescriptorSubtype 2 (FORMAT_TYPE)
bFormatType 1 (FORMAT_TYPE_I)
bNrChannels 2
bSubframeSize 2
bBitResolution 16
bSamFreqType 1 Discrete
tSamFreq[ 0] 44100
Endpoint Descriptor:
bLength 9
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x00b4 1x 180 bytes
bInterval 4
bRefresh 0
bSynchAddress 0
AudioControl Endpoint Descriptor:
bLength 7
bDescriptorType 37
bDescriptorSubtype 1 (EP_GENERAL)
bmAttributes 0x00
bLockDelayUnits 0 Undefined
wLockDelay 0 Undefined
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 3
bNumEndpoints 1
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 0
iInterface 0
AudioStreaming Interface Descriptor:
bLength 7
bDescriptorType 36
bDescriptorSubtype 1 (AS_GENERAL)
bTerminalLink 3
bDelay 1 frames
wFormatTag 1 PCM
AudioStreaming Interface Descriptor:
bLength 11
bDescriptorType 36
bDescriptorSubtype 2 (FORMAT_TYPE)
bFormatType 1 (FORMAT_TYPE_I)
bNrChannels 2
bSubframeSize 2
bBitResolution 16
bSamFreqType 1 Discrete
tSamFreq[ 0] 32000
Endpoint Descriptor:
bLength 9
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0084 1x 132 bytes
bInterval 4
bRefresh 0
bSynchAddress 0
AudioControl Endpoint Descriptor:
bLength 7
bDescriptorType 37
bDescriptorSubtype 1 (EP_GENERAL)
bmAttributes 0x00
bLockDelayUnits 0 Undefined
wLockDelay 0 Undefined
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 4
bNumEndpoints 1
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 0
iInterface 0
AudioStreaming Interface Descriptor:
bLength 7
bDescriptorType 36
bDescriptorSubtype 1 (AS_GENERAL)
bTerminalLink 3
bDelay 1 frames
wFormatTag 1 PCM
AudioStreaming Interface Descriptor:
bLength 11
bDescriptorType 36
bDescriptorSubtype 2 (FORMAT_TYPE)
bFormatType 1 (FORMAT_TYPE_I)
bNrChannels 2
bSubframeSize 2
bBitResolution 16
bSamFreqType 1 Discrete
tSamFreq[ 0] 16000
Endpoint Descriptor:
bLength 9
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0044 1x 68 bytes
bInterval 4
bRefresh 0
bSynchAddress 0
AudioControl Endpoint Descriptor:
bLength 7
bDescriptorType 37
bDescriptorSubtype 1 (EP_GENERAL)
bmAttributes 0x00
bLockDelayUnits 0 Undefined
wLockDelay 0 Undefined
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 5
bNumEndpoints 1
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 0
iInterface 0
AudioStreaming Interface Descriptor:
bLength 7
bDescriptorType 36
bDescriptorSubtype 1 (AS_GENERAL)
bTerminalLink 3
bDelay 1 frames
wFormatTag 1 PCM
AudioStreaming Interface Descriptor:
bLength 11
bDescriptorType 36
bDescriptorSubtype 2 (FORMAT_TYPE)
bFormatType 1 (FORMAT_TYPE_I)
bNrChannels 2
bSubframeSize 2
bBitResolution 16
bSamFreqType 1 Discrete
tSamFreq[ 0] 8000
Endpoint Descriptor:
bLength 9
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0024 1x 36 bytes
bInterval 4
bRefresh 0
bSynchAddress 0
AudioControl Endpoint Descriptor:
bLength 7
bDescriptorType 37
bDescriptorSubtype 1 (EP_GENERAL)
bmAttributes 0x00
bLockDelayUnits 0 Undefined
wLockDelay 0 Undefined
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00

  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0

bMaxPacketSize0 64
bNumConfigurations 1
Device Status: 0x0000
(Bus Powered)

Quoted 2 lines

It may also be helpful to describe what A/V connections the DVD drive has (composite, svideo, etc).

Yes, s-video and composite rca (and two rca inputs for sound).

Will maybe see later about that mcentral driver.

Signature · 10 lines

Mikko Rauhala <[email protected]>       - http://www.iki.fi/mjr/blog/  
The Finnish Pirate Party         - http://piraattipuolue.fi/  
World Transhumanist Association  - http://transhumanism.org/  
Singularity Institute            - http://singinst.org/  


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