(sorry, dropped the list off this)
On 03/22/11 10:55, Hans Petter Selasky wrote:
On Tuesday 22 March 2011 15:16:56 Jimmie James wrote:
Camera works fine with skype, emesene work wonderfully, mplayer gives me
an image, but it flashes between green screen and the actual images.
Full vlc -vv output is here, http://pastebin.com/MaEP6f6R (highlights
below) Anyone have a suggestion/hint/tip?
VLC is unable to open the MRL 'v4l://'. Check the log for details.
Hi,
I think VLC removed support for Webcams. Only video streaming devices and DVB-
X devices are supported.
Flickering pictures might be due to lack of buffering in webcamd.
Could you dump the config descriptor with usbconfig for your device?
Which version of webcamd are you using?
--HPS
That's interesting with VLC, googling around seems to suggest it works
with V4L2
usbconfig -u 2 -a 2 dump_curr_config_desc is at the end of this message.
webcamd-0.1.20_1
gstreamer-plugins-v4l2-0.10.27,3 Gstreamer Video 4 Linux 2 source plugin
libv4l-0.8.1 Video4Linux library
v4l_compat-1.0.20101027_1 Video4Linux IOCTL header files
As for mplayer, I'm going to "assuME" it's more user error/command line
options after playing a bit more with it.
Mplayer called like mplayer tv:// -tv driver=v4l:device=/dev/video0 is
clear.
Playing tv://.
TV file format detected.
Selected driver: v4l
name: Video 4 Linux input
author: Alex Beregszaszi
comment: under development
=================================================================
WARNING: YOU ARE USING V4L DEMUXER WITH V4L2 DRIVERS!!!
As the V4L1 compatibility layer is broken, this may not work.
If you encounter any problems, use driver=v4l2 instead.
Bugreports on driver=v4l with v4l2 drivers will be ignored.
=================================================================
Selected device: Logitech QuickCam Pro 4000
Capabilities: capture teletext overlay clipping frameram mjpeg-encoder
Device type: 1917853805
Supported sizes: 160x120 => 640x480
Inputs: 1
0: usb: (tuner:0, norm:pal)
Called like tv:// -tv driver=v4l2:device=/dev/video0 is all flickery.
MPlayer SVN-r32577-snapshot-4.2.1 (C) 2000-2010 MPlayer Team
Playing tv://.
TV file format detected.
Selected driver: v4l2
name: Video 4 Linux 2 input
author: Martin Olschewski <olschew...@zpr.uni-koeln.de>
comment: first try, more to come ;-)
Selected device: Logitech QuickCam Pro 4000
Capabilities: video capture read/write streaming
supported norms: 0 = webcam;
inputs: 0 = usb;
Current input: 0
Current format: YUV420
tv.c: norm_from_string(pal): Bogus norm parameter, setting default.
Selected input hasn't got a tuner!
v4l2: Cannot get fps
v4l2: ioctl set mute failed: Invalid argument
v4l2: ioctl query control failed: Invalid argument
==========================================================================
Opening video decoder: [raw] RAW Uncompressed Video
Movie-Aspect is undefined - no prescaling applied.
VO: [x11] 640x480 => 640x480 Planar YV12
[swscaler @ 0x2aa3f010] using unscaled yuv420p -> bgra special converter
Selected video codec: [rawyv12] vfm: raw (RAW YV12)
ugen2.2: <product 0x08b2 vendor 0x046d> at usbus2, cfg=0 md=HOST
spd=FULL (12Mbps) pwr=ON
Configuration index 0
bLength = 0x0009
bDescriptorType = 0x0002
wTotalLength = 0x01fd
bNumInterfaces = 0x0003
bConfigurationValue = 0x0001
iConfiguration = 0x0000 <no string>
bmAttributes = 0x00a0
bMaxPower = 0x00fa
Interface 0
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0000
bAlternateSetting = 0x0000
bNumEndpoints = 0x0002
bInterfaceClass = 0x000a
bInterfaceSubClass = 0x00ff
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Endpoint 0
bLength = 0x0007
bDescriptorType = 0x0005
bEndpointAddress = 0x0082 <IN>
bmAttributes = 0x0003 <INTERRUPT>
wMaxPacketSize = 0x0001
bInterval = 0x0064
bRefresh = 0x0000
bSynchAddress = 0x0000
Endpoint 1
bLength = 0x0007
bDescriptorType = 0x0005
bEndpointAddress = 0x0085 <IN>
bmAttributes = 0x0001 <ISOCHRONOUS>
wMaxPacketSize = 0x0000
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Interface 0 Alt 1
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0000
bAlternateSetting = 0x0001
bNumEndpoints = 0x0002
bInterfaceClass = 0x000a
bInterfaceSubClass = 0x00ff
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Endpoint 0
bLength = 0x0007
bDescriptorType = 0x0005
bEndpointAddress = 0x0082 <IN>
bmAttributes = 0x0003 <INTERRUPT>
wMaxPacketSize = 0x0001
bInterval = 0x0064
bRefresh = 0x0000
bSynchAddress = 0x0000
Endpoint 1
bLength = 0x0007
bDescriptorType = 0x0005
bEndpointAddress = 0x0085 <IN>
bmAttributes = 0x0001 <ISOCHRONOUS>
wMaxPacketSize = 0x00c4
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Interface 0 Alt 2
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0000
bAlternateSetting = 0x0002
bNumEndpoints = 0x0002
bInterfaceClass = 0x000a
bInterfaceSubClass = 0x00ff
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Endpoint 0
bLength = 0x0007
bDescriptorType = 0x0005
bEndpointAddress = 0x0082 <IN>
bmAttributes = 0x0003 <INTERRUPT>
wMaxPacketSize = 0x0001
bInterval = 0x0064
bRefresh = 0x0000
bSynchAddress = 0x0000
Endpoint 1
bLength = 0x0007
bDescriptorType = 0x0005
bEndpointAddress = 0x0085 <IN>
bmAttributes = 0x0001 <ISOCHRONOUS>
wMaxPacketSize = 0x0124
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Interface 0 Alt 3
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0000
bAlternateSetting = 0x0003
bNumEndpoints = 0x0002
bInterfaceClass = 0x000a
bInterfaceSubClass = 0x00ff
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Endpoint 0
bLength = 0x0007
bDescriptorType = 0x0005
bEndpointAddress = 0x0082 <IN>
bmAttributes = 0x0003 <INTERRUPT>
wMaxPacketSize = 0x0001
bInterval = 0x0064
bRefresh = 0x0000
bSynchAddress = 0x0000
Endpoint 1
bLength = 0x0007
bDescriptorType = 0x0005
bEndpointAddress = 0x0085 <IN>
bmAttributes = 0x0001 <ISOCHRONOUS>
wMaxPacketSize = 0x01c0
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Interface 0 Alt 4
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0000
bAlternateSetting = 0x0004
bNumEndpoints = 0x0002
bInterfaceClass = 0x000a
bInterfaceSubClass = 0x00ff
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Endpoint 0
bLength = 0x0007
bDescriptorType = 0x0005
bEndpointAddress = 0x0082 <IN>
bmAttributes = 0x0003 <INTERRUPT>
wMaxPacketSize = 0x0001
bInterval = 0x0064
bRefresh = 0x0000
bSynchAddress = 0x0000
Endpoint 1
bLength = 0x0007
bDescriptorType = 0x0005
bEndpointAddress = 0x0085 <IN>
bmAttributes = 0x0001 <ISOCHRONOUS>
wMaxPacketSize = 0x0250
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Interface 0 Alt 5
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0000
bAlternateSetting = 0x0005
bNumEndpoints = 0x0002
bInterfaceClass = 0x000a
bInterfaceSubClass = 0x00ff
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Endpoint 0
bLength = 0x0007
bDescriptorType = 0x0005
bEndpointAddress = 0x0082 <IN>
bmAttributes = 0x0003 <INTERRUPT>
wMaxPacketSize = 0x0001
bInterval = 0x0064
bRefresh = 0x0000
bSynchAddress = 0x0000
Endpoint 1
bLength = 0x0007
bDescriptorType = 0x0005
bEndpointAddress = 0x0085 <IN>
bmAttributes = 0x0001 <ISOCHRONOUS>
wMaxPacketSize = 0x02c0
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Interface 0 Alt 6
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0000
bAlternateSetting = 0x0006
bNumEndpoints = 0x0002
bInterfaceClass = 0x000a
bInterfaceSubClass = 0x00ff
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Endpoint 0
bLength = 0x0007
bDescriptorType = 0x0005
bEndpointAddress = 0x0082 <IN>
bmAttributes = 0x0003 <INTERRUPT>
wMaxPacketSize = 0x0001
bInterval = 0x0064
bRefresh = 0x0000
bSynchAddress = 0x0000
Endpoint 1
bLength = 0x0007
bDescriptorType = 0x0005
bEndpointAddress = 0x0085 <IN>
bmAttributes = 0x0001 <ISOCHRONOUS>
wMaxPacketSize = 0x0308
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Interface 0 Alt 7
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0000
bAlternateSetting = 0x0007
bNumEndpoints = 0x0002
bInterfaceClass = 0x000a
bInterfaceSubClass = 0x00ff
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Endpoint 0
bLength = 0x0007
bDescriptorType = 0x0005
bEndpointAddress = 0x0082 <IN>
bmAttributes = 0x0003 <INTERRUPT>
wMaxPacketSize = 0x0001
bInterval = 0x0064
bRefresh = 0x0000
bSynchAddress = 0x0000
Endpoint 1
bLength = 0x0007
bDescriptorType = 0x0005
bEndpointAddress = 0x0085 <IN>
bmAttributes = 0x0001 <ISOCHRONOUS>
wMaxPacketSize = 0x0348
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Interface 0 Alt 8
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0000
bAlternateSetting = 0x0008
bNumEndpoints = 0x0002
bInterfaceClass = 0x000a
bInterfaceSubClass = 0x00ff
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Endpoint 0
bLength = 0x0007
bDescriptorType = 0x0005
bEndpointAddress = 0x0082 <IN>
bmAttributes = 0x0003 <INTERRUPT>
wMaxPacketSize = 0x0001
bInterval = 0x0064
bRefresh = 0x0000
bSynchAddress = 0x0000
Endpoint 1
bLength = 0x0007
bDescriptorType = 0x0005
bEndpointAddress = 0x0085 <IN>
bmAttributes = 0x0001 <ISOCHRONOUS>
wMaxPacketSize = 0x0380
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Interface 0 Alt 9
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0000
bAlternateSetting = 0x0009
bNumEndpoints = 0x0002
bInterfaceClass = 0x000a
bInterfaceSubClass = 0x00ff
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Endpoint 0
bLength = 0x0007
bDescriptorType = 0x0005
bEndpointAddress = 0x0082 <IN>
bmAttributes = 0x0003 <INTERRUPT>
wMaxPacketSize = 0x0001
bInterval = 0x0064
bRefresh = 0x0000
bSynchAddress = 0x0000
Endpoint 1
bLength = 0x0007
bDescriptorType = 0x0005
bEndpointAddress = 0x0085 <IN>
bmAttributes = 0x0001 <ISOCHRONOUS>
wMaxPacketSize = 0x03c0
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Interface 0 Alt 10
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0000
bAlternateSetting = 0x000a
bNumEndpoints = 0x0002
bInterfaceClass = 0x000a
bInterfaceSubClass = 0x00ff
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Endpoint 0
bLength = 0x0007
bDescriptorType = 0x0005
bEndpointAddress = 0x0082 <IN>
bmAttributes = 0x0003 <INTERRUPT>
wMaxPacketSize = 0x0001
bInterval = 0x0064
bRefresh = 0x0000
bSynchAddress = 0x0000
Endpoint 1
bLength = 0x0007
bDescriptorType = 0x0005
bEndpointAddress = 0x0085 <IN>
bmAttributes = 0x0001 <ISOCHRONOUS>
wMaxPacketSize = 0x03c0
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Interface 1
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0001
bAlternateSetting = 0x0000
bNumEndpoints = 0x0000
bInterfaceClass = 0x0001
bInterfaceSubClass = 0x0001
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Additional Descriptor
bLength = 0x09
bDescriptorType = 0x24
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x09, 0x24, 0x01, 0x00, 0x01, 0x26, 0x00, 0x01,
0x08 | 0x02
Additional Descriptor
bLength = 0x0c
bDescriptorType = 0x24
bDescriptorSubType = 0x02
RAW dump:
0x00 | 0x0c, 0x24, 0x02, 0x01, 0x01, 0x02, 0x00, 0x01,
0x08 | 0x00, 0x00, 0x00, 0x00
Additional Descriptor
bLength = 0x08
bDescriptorType = 0x24
bDescriptorSubType = 0x06
RAW dump:
0x00 | 0x08, 0x24, 0x06, 0x02, 0x01, 0x01, 0x03, 0x00
Additional Descriptor
bLength = 0x09
bDescriptorType = 0x24
bDescriptorSubType = 0x03
RAW dump:
0x00 | 0x09, 0x24, 0x03, 0x03, 0x01, 0x01, 0x00, 0x02,
0x08 | 0x00
Interface 2
bLength = 0x000b
bDescriptorType = 0x0004
bInterfaceNumber = 0x0002
bAlternateSetting = 0x0000
bNumEndpoints = 0x0001
bInterfaceClass = 0x0001
bInterfaceSubClass = 0x0002
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Endpoint 0
bLength = 0x0009
bDescriptorType = 0x0005
bEndpointAddress = 0x0084 <IN>
bmAttributes = 0x0001 <ISOCHRONOUS>
wMaxPacketSize = 0x0000
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Interface 2 Alt 1
bLength = 0x000b
bDescriptorType = 0x0004
bInterfaceNumber = 0x0002
bAlternateSetting = 0x0001
bNumEndpoints = 0x0001
bInterfaceClass = 0x0001
bInterfaceSubClass = 0x0002
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x24
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x24, 0x01, 0x03, 0x01, 0x01, 0x00
Additional Descriptor
bLength = 0x0b
bDescriptorType = 0x24
bDescriptorSubType = 0x02
RAW dump:
0x00 | 0x0b, 0x24, 0x02, 0x01, 0x01, 0x02, 0x10, 0x01,
0x08 | 0x44, 0xac, 0x00
Endpoint 0
bLength = 0x0009
bDescriptorType = 0x0005
bEndpointAddress = 0x0084 <IN>
bmAttributes = 0x0001 <ISOCHRONOUS>
wMaxPacketSize = 0x005a
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x25
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x25, 0x01, 0x00, 0x00, 0x00, 0x00
Interface 2 Alt 2
bLength = 0x000b
bDescriptorType = 0x0004
bInterfaceNumber = 0x0002
bAlternateSetting = 0x0002
bNumEndpoints = 0x0001
bInterfaceClass = 0x0001
bInterfaceSubClass = 0x0002
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x24
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x24, 0x01, 0x03, 0x01, 0x01, 0x00
Additional Descriptor
bLength = 0x0b
bDescriptorType = 0x24
bDescriptorSubType = 0x02
RAW dump:
0x00 | 0x0b, 0x24, 0x02, 0x01, 0x01, 0x02, 0x10, 0x01,
0x08 | 0x22, 0x56, 0x00
Endpoint 0
bLength = 0x0009
bDescriptorType = 0x0005
bEndpointAddress = 0x0084 <IN>
bmAttributes = 0x0001 <ISOCHRONOUS>
wMaxPacketSize = 0x002e
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x25
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x25, 0x01, 0x00, 0x00, 0x00, 0x00
Interface 2 Alt 3
bLength = 0x000b
bDescriptorType = 0x0004
bInterfaceNumber = 0x0002
bAlternateSetting = 0x0003
bNumEndpoints = 0x0001
bInterfaceClass = 0x0001
bInterfaceSubClass = 0x0002
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x24
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x24, 0x01, 0x03, 0x01, 0x01, 0x00
Additional Descriptor
bLength = 0x0b
bDescriptorType = 0x24
bDescriptorSubType = 0x02
RAW dump:
0x00 | 0x0b, 0x24, 0x02, 0x01, 0x01, 0x02, 0x10, 0x01,
0x08 | 0x11, 0x2b, 0x00
Endpoint 0
bLength = 0x0009
bDescriptorType = 0x0005
bEndpointAddress = 0x0084 <IN>
bmAttributes = 0x0001 <ISOCHRONOUS>
wMaxPacketSize = 0x0019
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x25
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x25, 0x01, 0x00, 0x00, 0x00, 0x00
Interface 2 Alt 4
bLength = 0x000b
bDescriptorType = 0x0004
bInterfaceNumber = 0x0002
bAlternateSetting = 0x0004
bNumEndpoints = 0x0001
bInterfaceClass = 0x0001
bInterfaceSubClass = 0x0002
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x24
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x24, 0x01, 0x03, 0x01, 0x01, 0x00
Additional Descriptor
bLength = 0x0b
bDescriptorType = 0x24
bDescriptorSubType = 0x02
RAW dump:
0x00 | 0x0b, 0x24, 0x02, 0x01, 0x01, 0x02, 0x10, 0x01,
0x08 | 0x40, 0x1f, 0x00
Endpoint 0
bLength = 0x0009
bDescriptorType = 0x0005
bEndpointAddress = 0x0084 <IN>
bmAttributes = 0x0001 <ISOCHRONOUS>
wMaxPacketSize = 0x0010
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x25
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x25, 0x01, 0x00, 0x00, 0x00, 0x00
--
I am currently away on leave, traveling through time and will be
returning last week.
Life is tough, but it's tougher when you're stupid.
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