Trying to get a webcam working with Gem (the 00.SimpleVideo.pd patch for now), and nothing is being rendered. The camera works with other applications, just not with PD/GEM.

The terminal command-line shows the error "v4l: get capabilities: Invalid Argument" whenever the Driver or Device messages are sent to pix_video.

There's no error in PD except for "verbose ( 0):v41: stopped Transfer" when above messages are sent.

GEM appears to have v4l support. Using latest pd-extended and GEM. All libraries were updated.

When the patch first starts PD shows:

[pix_video]: video driver 0: video4linux v4l
[pix_video]: video driver 1: ieee1394 dv4l dv

After searching for solutions this afternoon, I tried specifying pix_video messages "driver 0" "device /dev/video0" "colorspace yuv", and also sent "mode 0" to pix_texture.

I also tried LD_PRELOAD=/usr/lib/libv4l/v4lcompat.so pd but also made no difference.

Ideas?

Forgot to mention a couple things:

I don't think it's permission issues (PD/GEM not being able to open /dev/video0) because the permissions look okay and running PD as root doesn't help.

I also thought that perhaps the video is compressed and this has something to do with video not being rendered under PD on my system, but VLC states that it's an uncompressed video stream. But still...

Greetings,

No solution here, just the same problem on a 64-bit Arch Linux system with Pd-L2Ork. The webcam works fine in Cheese and about any other relevant app, but I get no joy in Pd. Anyone have a suggestion for fixing the problem ? Btw, I built Pd-L2Ork from sources, if it makes a difference.

Best,

dp

@pmark23: Looks like we're not going to get a reply here.

Yo,

It might be worth asking on the Pd mailing list. I think the developers are more active there.

@Jwif - Ah, okay, I'll do that. Thanks for the heads-up, I assumed devs were reading this stuff too.

I now have my Webcam and my miniDV camera working with 64-bit Pd-extended (L2Ork edition) on Arch Linux with a 3.0 kernel. The solution was straightforward enough: I compiled and installed the latest GEM (0.93.3, I think), after making sure that its configuration included support for my V4L2 and IEEE1394 devices. Now I can run the SimpleVideo GEM example and switch between the devices. However, I have to use a message box to specify /dev/fw1 as the Firewire device, after a quick 'chmod 666 /dev/fw1'. The old device selection won't work with the new FW stack in the kernel. I hope that information helps others with similar problems.