DV Camera Panasonic NV-GS180 as a webcam on Suse 10.3
Frage von Eckart Pluennecke: Juli 2020
Hello
I've run out while Langer probiert, my video camera NV-GS 180 as a webcam under Suse 10.3 to run. The camera is in USB port in the Webcam mode. After connecting the camera and installing the module uvcvideo does it almost synonymous, but only almost.
The only program that shows me a picture, is luvcview. By Call of luvcview-d / dev / video-I 12 do I get a picture with about 12 fps to see and luvcview reports:
luvcview 0.2.4
SDL information: Video driver: x11 A window manager is available Device information: Device path: / dev / video Stream settings: Frame format: MJPG Frame size: 320x240 (size 640x480 requested is not supported by device) Frame rate: 25 / 2 fps (requested frame rate 12 fps is not supported by device)
Where does that also.
But as in Kopete comes only a black picture. vlc reports "[00000322] v4l demuxer error: can not get channel infos (The argument is valid ¼ Hungarian). "xawtv ¤ talks is something multilingual, but for me unverstà r ¤ TALLY FRIENDLY:
This is xawtv-3.95, running on Linux/i686 (2.6.22.18-0.2-bigsmp) xinerama 0: 1680x1050 0 0 / dev/video0 [v4l2]: no overlay support v4l-conf had some trouble, trying to continue anyway ioctl: VIDIOC_G_STD (std% 0xb7fb65dfbfaf8a60 [PAL_D, PAL_D1, PAL_N, PAL_60,?, SECAM_B, SECAM_D, SECAM_G, SECAM_H, SECAM_K1? ATSC_8_VSB, ATSC_16_VSB (null) (null) (null) (null) (null) (null) (null) (null) (null) (null) (null) (null) (null) (null) (null) (null) (null) (null) (null) (null) (null) (null) (null) (null) (null) (null) (null) (null) (null) (null)]): The argument is valid Hungarian ¼ ioctl: VIDIOC_S_STD (std% 0x0 []): The argument is valid Hungarian ¼ no way to get: 384x288 32 bit TrueColor (LE: BGR)
And now I stand on the hose and said do not know where further search. Could it be that it s.der GÃ ¶ sse of 320x240, or the somewhat peculiar 25 / 2 fps? Or that the whole matter as MJPG?
¼ rde I would glad if someone could tell kà ¶ how I the video image, which is obviously in the PC arrives in kopete or vlc or similar ¤ à get.
Thank you in advance and Grà ¼ sse from the Emmental Ecki
Antwort von Dirk Thierbach:
Eckart Plünnecke wrote: > I've run out while Langer probiert, my video camera NV-GS 180 as a webcam > Under Suse 10.3 to run. The camera is in USB port in the > Webcam mode. After connecting the camera and installing the module > Uvcvideo works almost synonymous, but only almost.
> The only program that shows me a picture, is luvcview. [...] > But for example in Kopete comes only a black picture. vlc reports "[00000322] v4l > Demuxer error: can not get channel infos (The argument is invalid). "Xawtv > Is a little talkative, but to me incomprehensible:
> Ioctl: VIDIOC_G_STD (std% 0xb7fb65dfbfaf8a60 [...] > The argument is invalid
> And now I stand on the hose and said do not know where > Continue looking. Could it be that it s.der the size of 320x240, or the > Somewhat peculiar 25 / 2 fps? Or that the whole matter as MJPG?
> I would be glad if someone could tell me how I use the video image, > Which is obviously in the PC arrives in kopete or vlc or something similar > Get.
I can not tell you, but I can tell you roughly what goes wrong: The application programs (vlc, etc.) communicate with the Drivers (= kernel module) about so-called "ioctl" s. The Drivers, the Because you've loaded, but support at least one ioctl, namely "VIDIOC_G_STD" (asked as to whether the picture in PAL / NTSC / SECAM, etc. arrives) not. Then get the most apparently Programs a Hiccups and no longer know quite what to do.
I have no Suse, and synonymous know "uvcvideo", but the name seems "luvcview" so closely related to be used and therefore possibly only the iotcl's, the driver understands synonymous.
If not someone else who knows better, a little smarter change, would I'll find out what Drivers (= what Kernel-module) there really is active (or my test with you "Module" above the kernel module?). The source code tells you synonymous then why VIDIOC_G_STD not supported (if you do not C can read, does it perhaps synonymous in a friendly e-mail s.die Authors of the module, which are synonymous in the source code in it.) Detailed Read any documentation provided with the kernel module is to harms not synonymous.
From the situation of her is "the driver has its own ioctl interface, and supports v4l/v4l2 not at all "to" times just a half-dozen lines of C source code in the insert, then running's "everything in it. Should we stop to see.
- Dirk
Antwort von Eckart Pluennecke:
Dirk Thierbach wrote:
> Eckart Plünnecke wrote: >> I've run out while Langer probiert, my video camera NV-GS 180 as >> Webcam on Suse 10.3 to run. The Camera is in >> USB port in webcam mode. After connecting the camera and Installation >> Uvcvideo module works almost synonymous, but only almost. > >> The only program that shows me a picture, is luvcview. > [...] >> But in Kopete for example, only a black picture. vlc reports "[00000322] >> V4l demuxer error: can not get channel infos (The argument is valid ¼ Hungarian) ". >> Xawtv is multilingual ¤ talks, but for me unverstà r ¤ TALLY FRIENDLY: > >> Ioctl: VIDIOC_G_STD (std% 0xb7fb65dfbfaf8a60 > [...] >> The argument is valid Hungarian ¼ > >> And now I stand on the hose and said do not know where >> Continue looking. Could it be that it s.der Gà ¶ sse of 320x240, or >> The somewhat peculiar 25 / 2 fps? Or that the whole than MJPG >> Arrives? > >> I would ¼ rde glad if someone could tell kà ¶, as I >> Video image, which is obviously in the PC arrives in kopete or vlc or >> à ¤ Similar receive. > > I can not tell you, but I can tell you roughly what > Goes wrong: The application programs (vlc, etc.) communicate with the > Drivers (= kernel module) about so-called "ioctl" s. The Drivers, the > Because you've loaded, but support at least one ioctl, namely > "VIDIOC_G_STD" (asked as to whether the picture in PAL / NTSC / SECAM, etc. arrives) > Not. Then get the most apparently Programs a > Hiccups and no longer know quite what to do.
Interesting, I am not come > > I have no Suse, and synonymous know "uvcvideo", but the name > Seems "luvcview" so closely related to be used and therefore > Possibly the only iotcl's, the driver understands synonymous. > > Unless someone else who knows better, a little smarter > Change, would I'll find out what Drivers (= what > Kernel module) that really is active (or my test with you > "Module" above the kernel module?). The source code tells you
Yes, "uvcvideo" is the kernel module and dates of http://linux-uvc.berlios.de (at Packman's an rpm reading). That Kernel module is loaded and is synonymous with v4l used:
luvcview dates of http://www.quickcamteam.net/software/linux/v4l2-software/luvcview/
and announces the call of luvcview-L (to be valid Video formats queried), the following:
luvcview 0.2.4
SDL information: Video driver: x11 A window manager is available Device information: Device path: / dev/video0 / dev/video0 does not support read i / o (Pixel format = 'MJPG', description = 'MJPEG') (Discrete: width = 320, height = 240) Time interval between frame: (min (2 / 25) .. max (2 / 25) / stepsize (1 / 10000000)),
Why there is "/ dev/video0 does not support read i / o" is not synonymous to me entirely clear. Perhaps it's because the other terminals Programs
If I luvcview à ¼ brige the parameter fà ¼ r your framerate (-i 12) do not , then goodbye synonymous and the program reports only:
Unable to set frame rate: Input / output error V4l2 init failed! exit fatal
Apparently the program recognizes not automagically Framrate of the devices.
> Synonymous then why VIDIOC_G_STD not supported (if you do not C > Read it, does it perhaps synonymous in a friendly e-mail s.die > Authors of the module, which are synonymous in the source code in it.) Detailed > Read any documentation provided with the kernel module is to > Harms not synonymous.
In the mailing of the Drivers project gabs last year schonmal a Question because of the same camera, but unfortunately no definite Kla ¤ rung. But an inquiry into the mailing list can not hurt.
Antwort von Dirk Thierbach:
Eckart Plünnecke wrote: > Yes, "uvcvideo" is the kernel module and dates of > http://linux-uvc.berlios.de (at Packman's an rpm reading).
: To query and select the standard used by the current video input or : Output applications call the VIDIOC_G_STD and VIDIOC_S_STD ioctl, : Respectively. The received standard can be sensed with the : VIDIOC_QUERYSTD ioctl. Note of all these parameters is a pointer IOCTLs : V4l2_std_id to a type (a standard set), not s.index into the standard : Enumeration [7]. Drivers must implement all standard video when IOCTLs : Has the device one or more video inputs or outputs. : Special rules apply to USB cameras where the notion of video : Standards makes little sense. More generally any capture device, : Output devices accordingly, which is : - Incapable of capturing fields or frames s.the nominal rate of the : Video standard, or : - Where timestamps refer to the instant the field or frame which : Received by the driver, not the capture time, or : : - Where sequence numbers refer to the frames received by the driver, : Not the captured frames. : : Here the driver shall set the std field of struct v4l2_input and : Struct v4l2_output to zero, the VIDIOC_G_STD, VIDIOC_S_STD, : VIDIOC_QUERYSTD and IOCTLs VIDIOC_ENUMSTD shall return the EINVAL : Errorcode [8].
The Teiber code does more or less, but forgets to make the Fields to zero:
"The argument is invalid" is probably EINVAL, and is apparently not as the exception for USB cameras detected. Perhaps, therefore, std because 0xb7fb65dfbfaf8a60% non-zero. Possible remedies also:
1) Change Drivers, so that the fields he really set to zero. 2) The application programs to inspect whether the exemption for USB cameras properly processed.
For the latter one should first look at the latest versions provide. According to wiki works at least one older version of Kopete not:
Recent versions of Kopete and then xawtv seems to work. If it still hangs, contact the developer, and Problem with the above details describe. Or better: a spendier Friend who can program in your home to a beer, and let it quickly write the patch and try it directly.
Can still of course be that only the first stumbling block is and it still hangs s.anderen things.
