* Re: NTSC/PAL resolution support for "EasyCap" device
[not found] <1464691129.3878.59.camel@hadess.net>
@ 2016-06-02 22:37 ` Laurent Pinchart
2016-06-03 10:53 ` Bastien Nocera
0 siblings, 1 reply; 4+ messages in thread
From: Laurent Pinchart @ 2016-06-02 22:37 UTC (permalink / raw)
To: Bastien Nocera; +Cc: linux-media
Hi Bastien,
(CC'ing the linux-media mailing list)
On Tuesday 31 May 2016 12:38:49 Bastien Nocera wrote:
> Hey,
>
> I saw your commits to add quirks for Arkmicro "webcams". I recently
> bought a dirt cheap "EasyCap" device on eBay, but it only seems to
> support 640x480 instead of the native "NRSC" resolution as mentioned on
> the device's box.
>
> $ v4l2-ctl --list-formats-ext -d /dev/video0
> ioctl: VIDIOC_ENUM_FMT
> Index : 0
> Type : Video Capture
> Pixel Format: 'MJPG' (compressed)
> Name : Motion-JPEG
> Size: Discrete 640x480
> Interval: Discrete 0.017s (60.000 fps)
> Interval: Discrete 0.033s (30.000 fps)
> Interval: Discrete 0.067s (15.000 fps)
> Interval: Discrete 0.200s (5.000 fps)
> Size: Discrete 352x288
> Interval: Discrete 0.017s (60.000 fps)
> Interval: Discrete 0.033s (30.000 fps)
> Interval: Discrete 0.067s (15.000 fps)
> Interval: Discrete 0.200s (5.000 fps)
>
> Device is:
> Bus 003 Device 066: ID 18ec:5850 Arkmicro Technologies Inc.
>
> In your professional opinion, should I try using UVC_QUIRK_PROBE_DEF
> or UVC_QUIRK_PROBE_MINMAX as a quirk for this device? Is there a stand-
> alone driver somewhere that I can use for testing (rather than
> recompiling a whole kernel)?
Those quirks will not affect the available resolutions.
UVC devices expose a list of resolutions they support through the USB
descriptors, and the uvcvideo device merely uses that list to expose supported
resolutions to userspace.
If the device doesn't expose resolutions other than the above two, the box
could be lying, or the device could use non-standard extensions to UVC to
support additional resolutions. The first step would be to try the camera in a
Windows machine to see if additional resolutions are available (without
installing any additional device-specific software).
> Let me know if you prefer that I send this to the media list.
Done :-)
--
Regards,
Laurent Pinchart
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: NTSC/PAL resolution support for "EasyCap" device
2016-06-02 22:37 ` NTSC/PAL resolution support for "EasyCap" device Laurent Pinchart
@ 2016-06-03 10:53 ` Bastien Nocera
2016-06-03 11:08 ` Laurent Pinchart
0 siblings, 1 reply; 4+ messages in thread
From: Bastien Nocera @ 2016-06-03 10:53 UTC (permalink / raw)
To: Laurent Pinchart; +Cc: linux-media
On Fri, 2016-06-03 at 01:37 +0300, Laurent Pinchart wrote:
> Hi Bastien,
>
> (CC'ing the linux-media mailing list)
>
> On Tuesday 31 May 2016 12:38:49 Bastien Nocera wrote:
> > Hey,
> >
> > I saw your commits to add quirks for Arkmicro "webcams". I recently
> > bought a dirt cheap "EasyCap" device on eBay, but it only seems to
> > support 640x480 instead of the native "NRSC" resolution as
> > mentioned on
> > the device's box.
> >
> > $ v4l2-ctl --list-formats-ext -d /dev/video0
> > ioctl: VIDIOC_ENUM_FMT
> > Index : 0
> > Type : Video Capture
> > Pixel Format: 'MJPG' (compressed)
> > Name : Motion-JPEG
> > Size: Discrete 640x480
> > Interval: Discrete 0.017s (60.000 fps)
> > Interval: Discrete 0.033s (30.000 fps)
> > Interval: Discrete 0.067s (15.000 fps)
> > Interval: Discrete 0.200s (5.000 fps)
> > Size: Discrete 352x288
> > Interval: Discrete 0.017s (60.000 fps)
> > Interval: Discrete 0.033s (30.000 fps)
> > Interval: Discrete 0.067s (15.000 fps)
> > Interval: Discrete 0.200s (5.000 fps)
> >
> > Device is:
> > Bus 003 Device 066: ID 18ec:5850 Arkmicro Technologies Inc.
> >
> > In your professional opinion, should I try using
> > UVC_QUIRK_PROBE_DEF
> > or UVC_QUIRK_PROBE_MINMAX as a quirk for this device? Is there a
> > stand-
> > alone driver somewhere that I can use for testing (rather than
> > recompiling a whole kernel)?
>
> Those quirks will not affect the available resolutions.
OK. I also made my own testing tree to copy/paste those devices.
> UVC devices expose a list of resolutions they support through the USB
> descriptors, and the uvcvideo device merely uses that list to expose supported
> resolutions to userspace.
Full lsusb below.
> If the device doesn't expose resolutions other than the above two, the box
> could be lying, or the device could use non-standard extensions to UVC to
> support additional resolutions. The first step would be to try the camera in a
> Windows machine to see if additional resolutions are available (without
> installing any additional device-specific software).
I should be able to find a Windows somewhere, but which application
should I use to see if those resolutions are indeed available?
BTW, given the price of the device, I'd be fine getting one for you to
test (6€ from eBay, shipping included).
> > Let me know if you prefer that I send this to the media list.
>
> Done :-)
Bus 003 Device 009: ID 18ec:5850 Arkmicro Technologies Inc.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2
bDeviceProtocol 1 Interface Association
bMaxPacketSize0 64
idVendor 0x18ec Arkmicro Technologies Inc.
idProduct 0x5850
bcdDevice 1.00
iManufacturer 1 ARKMICRO
iProduct 2 USB2.0 PC CAMERA
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 516
bNumInterfaces 4
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 200mA
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 0
bInterfaceCount 2
bFunctionClass 14 Video
bFunctionSubClass 3 Video Interface Collection
bFunctionProtocol 0
iFunction 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 1 Video Control
bInterfaceProtocol 0
iInterface 0
VideoControl Interface Descriptor:
bLength 13
bDescriptorType 36
bDescriptorSubtype 1 (HEADER)
bcdUVC 1.00
wTotalLength 51
dwClockFrequency 48.000000MHz
bInCollection 1
baInterfaceNr( 0) 1
VideoControl Interface Descriptor:
bLength 18
bDescriptorType 36
bDescriptorSubtype 2 (INPUT_TERMINAL)
bTerminalID 1
wTerminalType 0x0201 Camera Sensor
bAssocTerminal 0
iTerminal 0
wObjectiveFocalLengthMin 0
wObjectiveFocalLengthMax 0
wOcularFocalLength 0
bControlSize 3
bmControls 0x00000000
VideoControl Interface Descriptor:
bLength 11
bDescriptorType 36
bDescriptorSubtype 5 (PROCESSING_UNIT)
Warning: Descriptor too short
bUnitID 2
bSourceID 1
wMaxMultiplier 0
bControlSize 2
bmControls 0x0000063f
Brightness
Contrast
Hue
Saturation
Sharpness
Gamma
Gain
Power Line Frequency
iProcessing 0
bmVideoStandards 0x 9
None
SECAM - 625/50
VideoControl Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 3 (OUTPUT_TERMINAL)
bTerminalID 3
wTerminalType 0x0101 USB Streaming
bAssocTerminal 0
bSourceID 2
iTerminal 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0010 1x 16 bytes
bInterval 10
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceProtocol 0
iInterface 0
VideoStreaming Interface Descriptor:
bLength 14
bDescriptorType 36
bDescriptorSubtype 1 (INPUT_HEADER)
bNumFormats 1
wTotalLength 133
bEndPointAddress 131
bmInfo 0
bTerminalLink 3
bStillCaptureMethod 2
bTriggerSupport 1
bTriggerUsage 0
bControlSize 1
bmaControls( 0) 11
VideoStreaming Interface Descriptor:
bLength 11
bDescriptorType 36
bDescriptorSubtype 6 (FORMAT_MJPEG)
bFormatIndex 1
bNumFrameDescriptors 2
bFlags 1
Fixed-size samples: Yes
bDefaultFrameIndex 1
bAspectRatioX 0
bAspectRatioY 0
bmInterlaceFlags 0x00
Interlaced stream or variable: No
Fields per frame: 1 fields
Field 1 first: No
Field pattern: Field 1 only
bCopyProtect 0
VideoStreaming Interface Descriptor:
bLength 42
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 1
bmCapabilities 0x00
Still image unsupported
wWidth 640
wHeight 480
dwMinBitRate 128000
dwMaxBitRate 11059200
dwMaxVideoFrameBufferSize 614400
dwDefaultFrameInterval 333333
bFrameIntervalType 4
dwFrameInterval( 0) 166666
dwFrameInterval( 1) 333333
dwFrameInterval( 2) 666666
dwFrameInterval( 3) 2000000
VideoStreaming Interface Descriptor:
bLength 42
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 2
bmCapabilities 0x00
Still image unsupported
wWidth 352
wHeight 288
dwMinBitRate 128000
dwMaxBitRate 11059200
dwMaxVideoFrameBufferSize 202752
dwDefaultFrameInterval 333333
bFrameIntervalType 4
dwFrameInterval( 0) 166666
dwFrameInterval( 1) 333333
dwFrameInterval( 2) 666666
dwFrameInterval( 3) 2000000
VideoStreaming Interface Descriptor:
bLength 18
bDescriptorType 36
bDescriptorSubtype 3 (STILL_IMAGE_FRAME)
bEndpointAddress 0
bNumImageSizePatterns 2
wWidth( 0) 640
wHeight( 0) 480
wWidth( 1) 352
wHeight( 1) 288
bNumCompressionPatterns 2
bCompression( 0) 1
bCompression( 1) 2
bCompression( 2) 5
bCompression( 3) 14
VideoStreaming Interface Descriptor:
bLength 6
bDescriptorType 36
bDescriptorSubtype 13 (COLORFORMAT)
bColorPrimaries 0 (Unspecified)
bTransferCharacteristics 0 (Unspecified)
bMatrixCoefficients 0 (Unspecified)
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 1
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x00c0 1x 192 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 2
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x0180 1x 384 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 3
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 4
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x0280 1x 640 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 5
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x0320 1x 800 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 6
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x03c0 1x 960 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 7
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x0a80 2x 640 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 8
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x0b20 2x 800 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 9
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x0be0 2x 992 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 10
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x1380 3x 896 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 11
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x13e8 3x 1000 bytes
bInterval 1
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 2
bInterfaceCount 2
bFunctionClass 1 Audio
bFunctionSubClass 1 Control Device
bFunctionProtocol 0
iFunction 4 USB2.0 MIC
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 1 Audio
bInterfaceSubClass 1 Control Device
bInterfaceProtocol 0
iInterface 4 USB2.0 MIC
AudioControl Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 1 (HEADER)
bcdADC 1.00
wTotalLength 40
bInCollection 1
baInterfaceNr( 0) 3
AudioControl Interface Descriptor:
bLength 12
bDescriptorType 36
bDescriptorSubtype 2 (INPUT_TERMINAL)
bTerminalID 1
wTerminalType 0x0201 Microphone
bAssocTerminal 0
bNrChannels 2
wChannelConfig 0x0003
Left Front (L)
Right Front (R)
iChannelNames 0
iTerminal 0
AudioControl Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 3 (OUTPUT_TERMINAL)
bTerminalID 3
wTerminalType 0x0101 USB Streaming
bAssocTerminal 0
bSourceID 2
iTerminal 0
AudioControl Interface Descriptor:
bLength 10
bDescriptorType 36
bDescriptorSubtype 6 (FEATURE_UNIT)
bUnitID 2
bSourceID 1
bControlSize 1
bmaControls( 0) 0x00
bmaControls( 1) 0x03
Mute Control
Volume Control
bmaControls( 2) 0x03
Mute Control
Volume Control
iFeature 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 0
iInterface 4 USB2.0 MIC
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 1
bNumEndpoints 1
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 0
iInterface 4 USB2.0 MIC
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 1
bSubframeSize 2
bBitResolution 16
bSamFreqType 1 Discrete
tSamFreq[ 0] 48000
Endpoint Descriptor:
bLength 9
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x0060 1x 96 bytes
bInterval 4
bRefresh 0
bSynchAddress 0
AudioControl Endpoint Descriptor:
bLength 7
bDescriptorType 37
bDescriptorSubtype 1 (EP_GENERAL)
bmAttributes 0x01
Sampling Frequency
bLockDelayUnits 0 Undefined
wLockDelay 0 Undefined
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2
bDeviceProtocol 1 Interface Association
bMaxPacketSize0 64
bNumConfigurations 1
can't get debug descriptor: Resource temporarily unavailable
Device Status: 0x0000
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: NTSC/PAL resolution support for "EasyCap" device
2016-06-03 10:53 ` Bastien Nocera
@ 2016-06-03 11:08 ` Laurent Pinchart
2016-06-03 11:35 ` Bastien Nocera
0 siblings, 1 reply; 4+ messages in thread
From: Laurent Pinchart @ 2016-06-03 11:08 UTC (permalink / raw)
To: Bastien Nocera; +Cc: linux-media
Hi Bastien,
On Friday 03 Jun 2016 12:53:31 Bastien Nocera wrote:
> On Fri, 2016-06-03 at 01:37 +0300, Laurent Pinchart wrote:
> > On Tuesday 31 May 2016 12:38:49 Bastien Nocera wrote:
> >> Hey,
> >>
> >> I saw your commits to add quirks for Arkmicro "webcams". I recently
> >> bought a dirt cheap "EasyCap" device on eBay, but it only seems to
> >> support 640x480 instead of the native "NRSC" resolution as
> >> mentioned on the device's box.
> >>
> >> $ v4l2-ctl --list-formats-ext -d /dev/video0
> >> ioctl: VIDIOC_ENUM_FMT
> >>
> >> Index : 0
> >> Type : Video Capture
> >> Pixel Format: 'MJPG' (compressed)
> >> Name : Motion-JPEG
> >>
> >> Size: Discrete 640x480
> >>
> >> Interval: Discrete 0.017s (60.000 fps)
> >> Interval: Discrete 0.033s (30.000 fps)
> >> Interval: Discrete 0.067s (15.000 fps)
> >> Interval: Discrete 0.200s (5.000 fps)
> >>
> >> Size: Discrete 352x288
> >>
> >> Interval: Discrete 0.017s (60.000 fps)
> >> Interval: Discrete 0.033s (30.000 fps)
> >> Interval: Discrete 0.067s (15.000 fps)
> >> Interval: Discrete 0.200s (5.000 fps)
> >>
> >> Device is:
> >> Bus 003 Device 066: ID 18ec:5850 Arkmicro Technologies Inc.
> >>
> >> In your professional opinion, should I try using
> >> UVC_QUIRK_PROBE_DEF or UVC_QUIRK_PROBE_MINMAX as a quirk for this device?
> >> Is there a stand-alone driver somewhere that I can use for testing
> >> (rather than recompiling a whole kernel)?
> >
> > Those quirks will not affect the available resolutions.
>
> OK. I also made my own testing tree to copy/paste those devices.
>
> > UVC devices expose a list of resolutions they support through the USB
> > descriptors, and the uvcvideo device merely uses that list to expose
> > supported resolutions to userspace.
>
> Full lsusb below.
Thanks. The device only advertises two resolutions, 640x480 and 352x288.
> > If the device doesn't expose resolutions other than the above two, the
> > box could be lying, or the device could use non-standard extensions to UVC
> > to support additional resolutions. The first step would be to try the
> > camera in a Windows machine to see if additional resolutions are
> > available (without installing any additional device-specific software).
>
> I should be able to find a Windows somewhere, but which application
> should I use to see if those resolutions are indeed available?
My (lack of) Windows knowledge doesn't allow me to answer that question, but
I'm sure searching online will give you answers.
> BTW, given the price of the device, I'd be fine getting one for you to
> test (6€ from eBay, shipping included).
Thanks, but I'm already overwhelmed with work, I'd rather have you performing
the tests. Beside, I have no Windows machine :-)
--
Regards,
Laurent Pinchart
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: NTSC/PAL resolution support for "EasyCap" device
2016-06-03 11:08 ` Laurent Pinchart
@ 2016-06-03 11:35 ` Bastien Nocera
0 siblings, 0 replies; 4+ messages in thread
From: Bastien Nocera @ 2016-06-03 11:35 UTC (permalink / raw)
To: Laurent Pinchart; +Cc: linux-media
On Fri, 2016-06-03 at 14:08 +0300, Laurent Pinchart wrote:
>
<snip>
> > Full lsusb below.
>
> Thanks. The device only advertises two resolutions, 640x480 and
> 352x288.
As I read.
> > > If the device doesn't expose resolutions other than the above
> > > two, the
> > > box could be lying, or the device could use non-standard
> > > extensions to UVC
> > > to support additional resolutions. The first step would be to try
> > > the
> > > camera in a Windows machine to see if additional resolutions are
> > > available (without installing any additional device-specific
> > > software).
> >
> > I should be able to find a Windows somewhere, but which application
> > should I use to see if those resolutions are indeed available?
>
> My (lack of) Windows knowledge doesn't allow me to answer that
> question, but
> I'm sure searching online will give you answers.
"AMCap" seems to be the simplest software for that purpose, and it only
shows "640x480".
> > BTW, given the price of the device, I'd be fine getting one for you
> > to
> > test (6€ from eBay, shipping included).
>
> Thanks, but I'm already overwhelmed with work, I'd rather have you
> performing
> the tests. Beside, I have no Windows machine :-)
I've started the process of yelling at the vendor.
Cheers
^ permalink raw reply [flat|nested] 4+ messages in thread
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[not found] <1464691129.3878.59.camel@hadess.net>
2016-06-02 22:37 ` NTSC/PAL resolution support for "EasyCap" device Laurent Pinchart
2016-06-03 10:53 ` Bastien Nocera
2016-06-03 11:08 ` Laurent Pinchart
2016-06-03 11:35 ` Bastien Nocera
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