hi, 

if you can `dvgrab` your camera, then your camera has a DV link interface.
`dc1394` is not the same and it's intended for industrial IIDC compliant cameras.
You *cannot* grab a DV camera with the DC1394 library, see [1].

To use your DV camera with Gem, you need either to compile the `videoDV4L` plugin or to use a V4L wrapper for DV camcorder [2].
You can also try the Unicap plugin, but I'm not sure if it supports DV cam.

Unfortunately, I'm unable to build the videoDV4L plugin on Ubuntu 14.04.
`./configure` says DV plugin is enable (but is it the same ?) but the is no gem_videoDV4L.so.
I'll file a bug report for this.

Maybe this plugin works in 0.93.3 release, I never tried it before.
if you build Gem yourself, please consider the use of the git repo [3].
there are *lots* of improvements since 0.93.3 release.
The latest build system update will give you more information about which plugins are actually enabled when configuring.

+
A

[1] : http://damien.douxchamps.net/ieee1394/libdc1394/faq/#Can_I_use_it_for_my_DV_camcorder
[2] : https://sourceforge.net/projects/dv4l.berlios/
[3] : git://git.code.sf.net/p/pd-gem/gem 

--
do it yourself                      
http://antoine.villeret.free.fr


2014-08-10 23:55 GMT+02:00 <gnd@itchybit.org>:
Hi,

im running a clean install of Ubuntu 12.04, with Puredata 0.43.0-4 from Ubuntu repos, with a compiled Gem-0.93.3.

Configure output of Gem shows:

capture-support
    use PLUGINS          : yes
    use v4l              : yes (libv4l)
    use v4l2             : yes (libv4l)
    use ieee1394         : yes ( libdc1394 )

When i connect the dv device i see in dmesg:

[14522.765477] firewire_core: phy config: card 0, new root=ffc1, gap_count=5
[14522.765695] firewire_core: phy config: card 0, new root=ffc1, gap_count=5
[14523.269924] firewire_core: created device fw1: GUID 002011010f002781, S400

Im able to dvgrab from the device without problems.

When i create pix_video i see in console:

[pix_video]: backend #0='v4l2'  : v4l2 analog
[pix_video]: backend #1='v4l'   : v4l analog
[pix_video]: backend #2='dc1394'        : dc1394 iidc

When i send [driver dv( to pix_video:

videoctl: driver dv
[pix_video]: could not find a backend for driver 'dv'

When i send [device /dev/fw1( to pix_video:

videoctl: device /dev/fw1
Cannot open '/dev/fw1': 25, Inappropriate ioctl for device
videoDC1394: no cameras found

I try to set [driver 2(:

videoDC1394: no cameras found

I send now [device /dev/fw1( to pix_video:

videoctl: device /dev/fw1
videoDC1394: no cameras found

and so on ..

The device is there (i chmoded it to 777 to make sure)

# ls -la /dev|grep fw
crwxrwxrwx   1 root root    251,   0 Aug 10 19:41 fw0
crwxrwxrwx+  1 root video   251,   1 Aug 10 23:43 fw1

this is my kernel:

3.2.0-65-lowlatency #68-Ubuntu SMP PREEMPT

Does anyone have any idea what could be wrong ? I guess it must be sth stupid and trivial..

thx & regards,


gnd/









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