Looks like if you wanted to reproduce the same: setfacl -m u::rw- /dev/video0 setfacl -m u:lukeo:rw- /dev/video0 setfacl -m g::rw- /dev/video0 setfacl -m m::rw- /dev/video0 setfacl -m o::--- /dev/video0
There a -R (recursive) option. Directories can have default acls to spawn same on child files and directories, by prepending a d: like d:u::rw- HTH Geoff On Wed, Dec 22, 2010 at 12:37 PM, Luke Olson <[email protected]>wrote: > After more digging it seems to be a permission error. If run with sudo it > works on the server edition. The webcam mount has an access control list > which allows users to access the webcam on the desktop edition. On the > server edition there are no access control list associated with the webcam, > so only root can access it. This is from the desktop edition where the > webcam works fine, note the plus sign after the permissions which indicate > that there's a access control list associated with the file. > > lu...@751-115584a:~$ ls -o /dev | grep video > crw-rw----+ 1 root 81, 0 2010-12-22 10:55 video0 > > lu...@751-115584a:~$ getfacl /dev/video0 > getfacl: Removing leading '/' from absolute path names > # file: dev/video0 > # owner: root > # group: video > user::rw- > user:lukeo:rw- > group::rw- > mask::rw- > other::--- > > This is from the server edition where the webcam fails, note the missing > plus sign after the permissions indicating that no access control list is > associated with that file. I haven't tried the Epiphan yet but I assume it > will have the same issue. > > i...@testcaptureagent:~$ ls -o /dev | grep video > crw-rw---- 1 root 81, 0 2010-12-22 10:36 video0 > > Anyone familiar with access control lists? This is my first time dealing > with them. Not sure how the access control list was setup on the desktop > edition, maybe that same method can be used to setup the list on the server > edition. Or maybe just setting it up manually would be better? Or just > changing the file permissions itself rather than using the list? > > All the best, > > Luke > > > -----Original Message----- > From: [email protected] on behalf of Adam > Mckenzie > Sent: Tue 12/21/2010 2:39 PM > To: Matterhorn Users > Subject: Re: [Matterhorn-users] Having issues with the Trunk version. > > Hi Luke, > > Looking at the post you made on the Ubuntu forums have you tried using a > pipeline with a filesink instead of an xvimagesink? Something like: > > gst-launch v4l2src device=/dev/video0 ! ffenc_mpeg2video ! ffmux_mpegts ! > filesink location=hello.mpg > > Also what does it print out when you run: > vl4-info /dev/video0 or wherever the webcam happens to load to? > > Thanks, > Adam > > On Tue, Dec 21, 2010 at 1:50 PM, Luke Olson <[email protected] > >wrote: > > > For anyone interested I've posted the question on the Ubuntu forums as > > well. > > > > http://ubuntuforums.org/showthread.php?p=10265118 > > > > Luke > > > > -----Original Message----- > > From: [email protected] > > [mailto:[email protected]] On Behalf Of Luke > > Olson > > Sent: Tuesday, December 21, 2010 1:30 PM > > To: Matterhorn Users > > Subject: Re: [Matterhorn-users] Having issues with the Trunk version. > > > > I tried to get webcams to work on Ubuntu Server by installing all > > relevant packages, tried both desktop and server kernels, made sure all > > modules were loaded, etc. Though with no success. Sandeep is working on > > it as well as we don't really want to deploy a bunch of capture agents > > using the desktop version of Ubuntu (shorter support lifespan, uses more > > resources, takes longer to install and update). > > > > This will be an issue for anyone else wanting to use a webcam with the > > Ubuntu capture agent in future versions of Matterhorn (which seems like > > quite a few wanting to use webcams and UVC cameras). So whether we > > discover the solution later or if someone else already has, it would > > make a good addition to the Wiki. I'll be sure to ask the Ubuntu > > community but wanted to check here in case someone else has already run > > into the same issue because the likelihood is high. > > > > All the best, > > > > Luke > > > > > > -----Original Message----- > > From: [email protected] > > [mailto:[email protected]] On Behalf Of > > Christopher Brooks > > Sent: Tuesday, December 21, 2010 12:04 PM > > To: Matterhorn Users > > Subject: Re: [Matterhorn-users] Having issues with the Trunk version. > > > > On Tue, 21 Dec 2010 12:35:54 -0500 > > Sandeep Tamrakar <[email protected]> wrote: > > > > > > > > Hello, I work at Texas A&M University-Commerce under Luke. We have > > > been trying to figure out the way to make the USB camera to work on > > > the server version of Ubuntu 10.04. However, it has been a pain to > > > understand why it was not working. Then we tried installing the fresh > > > desktop version of Ubuntu and hey it works. We believe desktop > > > version is not what we want to use for the lecture capture agent. So > > > do you all have any ideas what might be wrong with the server version > > > not supporting the camera. (we are using Logitech C910). Thanks, > > > Sandeep Tamrakar > > > > Hi Sandeep, > > > > I think the ubuntu forums would be better off to help with this, unless > > someone here is using a similar camera on ubuntu... > > > > Chris > > > > -- > > Christopher Brooks, BSc, MSc > > ARIES Laboratory, University of Saskatchewan > > > > Web: http://www.cs.usask.ca/~cab938 <http://www.cs.usask.ca/%7Ecab938> > > Phone: 1.306.966.1442 > > Mail: Advanced Research in Intelligent Educational Systems Laboratory > > Department of Computer Science > > University of Saskatchewan > > 176 Thorvaldson Building > > 110 Science Place > > Saskatoon, SK > > S7N 5C9 > > _______________________________________________ > > Matterhorn-users mailing list > > [email protected] > > http://lists.opencastproject.org/mailman/listinfo/matterhorn-users > > _______________________________________________ > > Matterhorn-users mailing list > > [email protected] > > http://lists.opencastproject.org/mailman/listinfo/matterhorn-users > > _______________________________________________ > > Matterhorn-users mailing list > > [email protected] > > http://lists.opencastproject.org/mailman/listinfo/matterhorn-users > > > > > > -- > Adam McKenzie > MSc Student > ARIES Laboratory, University of Saskatchewan > > Web: http://aries.usask.ca/aiwiki/Adam_McKenzie > Mail: Advanced Research in Intelligent Educational Systems Laboratory > Department of Computer Science > University of Saskatchewan > 176 Thorvaldson Building > 110 Science Place > Saskatoon, SK > S7N 5C9 > > > _______________________________________________ > Matterhorn-users mailing list > [email protected] > http://lists.opencastproject.org/mailman/listinfo/matterhorn-users > > -- Geoff Smith Campus Technology Engineer U. Maine Farmington (207) 778-7307 [email protected]
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