Hi, the Iohannes' instructions are still relevant but there are few things you might pay attention to : - be sure you belong to "video" group, if you got an error like "[pix_record] : can't open /dev/video1" this could be the issue (if /dev/video1 exists of course) - set and start the capture *before* setting the device capture. The v4l2device is undefined (nor a capture or a tuner device) until you send the first frame to it.
here is attached a sample patch that works with current Gem from git. best antoine Le mer. 22 avr. 2015 à 15:06, Mario Mey <[email protected]> a écrit : > Hi, there. I'm reviving a mail from 2011... here it is the last of the > thread: > http://lists.puredata.info/pipermail/pd-list/2011-02/086741.html > > I was looking for help to use Gem with v4l2loopback. > These mails are the only ones where I found the way to do > it (no other place in internet). > > After installing v4l2loopback kernel module, I did what IOhannes said: > > ------------ > you should be able to use [pix_record] with v4l2loopback. > just do: > - - create [pix_record] > - - check at the console whether it prints something like "[pix_record]: > backend #1='V4L2'" (this will only happen the first time you create a > [pix_record] object for hygienic reasons) > - - if so, continue > - - set the codec to "v4l2" and the output filename to /dev/video1 (or > whatever your loopback-device is). > something like [codec v4l2, filename /dev/video1, record 1( should do > the trick. > > f > gmasdr > IOhannes > ----------- > > Now, there is /dev/video1 (also, /dev/video0 from Webcam). But, when > I try to open that device with VLC, I got this error: > > [0x7fed08000e28] v4l2 demux error: not a video capture device > [0x7fed08000e28] v4l2 demux error: not a radio tuner device > [0x7fed08000e08] v4l2 access error: not a video capture device > [0x7fed18003898] main input error: open of `v4l2:///dev/video1' failed > > I tried to open with Blender, videoOnTexture, but the texture > is black. There's no error messages. > > What am I doing wrong? > > I have Pd-extended 0.44.0-extended-20130808, Ubuntu 14.04. > I don't know how to know Gem version. > > > _______________________________________________ > [email protected] mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list >
v4l2loopback-test.pd
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