Hi Paul, On 11/16/2018 03:39 PM, Paul Menzel wrote: > 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 Try this patch: https://patchwork.linuxtv.org/patch/53043/ It probably fixes the same problem you are experiencing. Regards, Hans > >>> 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 >
