[PD] pix_video + firewire problem

[Antoine Villeret]

I just checked 0.93.3 out on a Ubuntu 12.04 32bit system.
And it suffer from the same issue reported in [1].
Note that I also give a workaround there to build DV plugin despite of the
issue.

[1] https://github.com/umlaeute/Gem/issues/38

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


2014-08-12 15:06 GMT+02:00 Antoine Villeret <antoine.villeret at gmail.com>:

> 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 at 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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>>
>
>
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