Dear Mauro, Thank you very much for the quick reply. On 11/15/18 12:38, Mauro Carvalho Chehab wrote: > Em Thu, 15 Nov 2018 11:42:32 +0100 Paul Menzel escreveu: >> I tried to get a Logitech QuickCam USB camera working, but unfortunately, it is >> not detected by user space (Cheese, MPlayer). > > Could you please try it with Camorama? > > https://github.com/alessio/camorama Thank you for the suggestion. At first, I only saw a black image, but changing the resolution made it work. See the status below. 1. does *not* work a) 160x120 b) 176x144 2. works a) 320x240 b) 352x288 >> It’s an old device, so it could be broken, but as it’s detected by the Linux >> kernel, I wanted to check with you first. >> >> Linux 4.18.10 from Debian Sid/unstable is used. >> >> ``` >> $ dmesg >> […] >> [ 2891.404361] usb 3-3: new full-speed USB device number 4 using ohci-pci >> [ 2891.626934] usb 3-3: New USB device found, idVendor=046d, idProduct=092e, bcdDevice= 0.00 >> [ 2891.626945] usb 3-3: New USB device strings: Mfr=1, Product=2, SerialNumber=0 >> [ 2891.626951] usb 3-3: Product: Camera >> [ 2891.626957] usb 3-3: Manufacturer: >> [ 2893.110249] calling media_devnode_init+0x0/0x1000 [media] @ 11704 >> [ 2893.110256] media: Linux media interface: v0.10 >> [ 2893.110329] initcall media_devnode_init+0x0/0x1000 [media] returned 0 after 56 usecs >> [ 2893.210078] calling videodev_init+0x0/0x79 [videodev] @ 11704 >> [ 2893.210084] videodev: Linux video capture interface: v2.00 >> [ 2893.210123] initcall videodev_init+0x0/0x79 [videodev] returned 0 after 21 usecs >> [ 2893.333140] calling gspca_init+0x0/0x1000 [gspca_main] @ 11704 >> [ 2893.333148] gspca_main: v2.14.0 registered >> [ 2893.333161] initcall gspca_init+0x0/0x1000 [gspca_main] returned 0 after 3 usecs >> [ 2893.370672] calling sd_driver_init+0x0/0x1000 [gspca_spca561] @ 11704 >> [ 2893.370751] gspca_main: spca561-2.14.0 probing 046d:092e >> [ 2893.482675] input: spca561 as /devices/pci0000:00/0000:00:12.0/usb3/3-3/input/input17 >> [ 2893.485415] usbcore: registered new interface driver spca561 >> [ 2893.485434] initcall sd_driver_init+0x0/0x1000 [gspca_spca561] returned 0 after 112054 usecs >> […] >> $ ls -l /dev/video* >> crw-rw----+ 1 root video 81, 0 Nov 15 09:26 /dev/video0 >> >> $ mplayer tv:// -tv driver=v4l2:device=/dev/video0 >> MPlayer 1.3.0 (Debian), built with gcc-8 (C) 2000-2016 MPlayer Team >> do_connect: could not connect to socket >> connect: 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 <olschewski@xxxxxxxxxxxxxxxx> >> comment: first try, more to come ;-) >> v4l2: your device driver does not support VIDIOC_G_STD ioctl, VIDIOC_G_PARM was used instead. >> Selected device: Camera >> Capabilities: video capture read/write streaming >> supported norms: >> inputs: 0 = spca561; >> Current input: 0 >> Current format: unknown (0x31363553) > > The problem is likely here: mplayer is probably not using libv4l2. Without > that, it can't decode the spca561 specific output format. It is probably > due to some option used when mplayer was built. I’ll try to look more into that in the next weeks. > In the case of Cheese, it uses Gstreamer, with defaults to not use libv4l2 > either. On newest versions of it, there is an environment var that would > allow enabling it (I don't remember what var). Thank you for the details. I’ll test that next week. […] Kind regards, Paul
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