Re: [PD] pix_video, webcam issue on Linux

-- David Shimamoto > it look like the Gem your using is not compiled with v4l2 suport. > > i have somthing like this when creating pix_video : [pix_video]: video > driver 0: video4linux2 v4l2 [pix_video]: video driver 1: video4linux v4l > [pix_video]: video driver 2: ieee1394 dv4l dv > so, for me V4L2 is default. > > i think you have to upgrade gem to a version that suport v4l2 in order > to use v4l2 devices... > > Cyrille > > > PSPunch a écrit : >> Hi all, >> >> >> This may not be specific to Pd/Gem.. >> >> >> I have a webcam I am trying to get working with [pix_video] in the >> following environment. >> >> - Ubuntu Studio 9.04, >> - Pd-extended 0.41.4 (.deb for the above distro) >> - Gem 0.92.2 >> >> >> The camera works fine with Skype for Linux and v4l-test. >> >> However, when specifying the device with [pix_video], I get a series of >> errors such as, >> >> v4l: VDIOCGCHAN: Invalid argument >> v4l: VIDIOCGMBUF: Invalid argument >> >> >> I've seen posts on this list related to similar errors, in the case of >> pdp, with advise to bypass the conditional jumps near where the defines >> appear... this did not work with Gem. (Tried with videoVL4.cpp) >> >> >> After some surfing, my understanding as of now is that Gem is trying to >> issue V4L functions, whereas my webcam driver only understands V4L2.. >> Is this so? >> >> >> I would appreciate advise on insight on what could be happening here, or >> even just workarounds to this case. >> >> >> >> Here are some hardware specs I gathered, followed by the output of Gem >> (or they could be from ioctl... I am new to V4L). >> >> >> -- Output of v4l_dump (http://www.raphnet.net/programmation/v4l_tools/) >> >> Using device /dev/video0 >> struct video_capability >> { >> name='Laptop_Integrated_Webcam_0.3M' >> channels=1 >> audios=0 >> maxwidth=640 >> maxheight=480 >> minwidth=48 >> minheight=32 >> } >> VIDIOCGCHAN: Invalid argument >> struct video_picture >> { >> brightness=32768 >> hue=32768 >> colour=41942 >> contrast=0 >> whiteness=0 >> depth=16 >> palette=8 >> } >> >> >> -- Pd main window output >> >> [pix_video]: video driver 0: video4linux v4l // <--- On object ctreation >> verbose( 1):[pix_video]: device-err: 0 // <--- When sending [device >> /dev/video0 < >> verbose( 0):v4l: stopped Transfer >> verbose( 1):v4l::startTransfer closing 6 >> >> >> -- Console output ( When sending [device /dev/video0< ) >> >> v4l: VDIOCGCHAN: Invalid argument >> v4l: VDIOCGCHAN: Invalid argument >> v4l: VIDIOCGMBUF: Invalid argument >> >> >> >> Thank you in advance.. >> >