[GEM-dev] [ pd-gem-Bugs-3177361 ] no images with FW camera

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Thu Feb 10 15:15:14 CET 2011


Bugs item #3177361, was opened at 2011-02-10 15:02
Message generated for change (Comment added) made by zmoelnig
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Category: Pixes (pix_ objects)
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Cyrille Henry (nusmuk)
Assigned to: Nobody/Anonymous (nobody)
Summary: no images with FW camera

Initial Comment:
hello,
with Gem svn, ubuntu 10.04 (kernell 2.6.32), and a guppy pro (from AVT) connected with FW800, i can't have images.
(same result with a stingray from AVT)
the camera create a device /dev/raw1394 and /dev/video1394/0 
i've got video plugin dv4l and dc1394.

coriender can grab images without any problem.

i don't know if it's related, but when creating pix_video object, i've got an error in the terminal : 
libdc1394 error: Error: Failed to allocate iso bandwidth
libdc1394 error: Error: Failed to setup DMA capture 


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>Comment By: IOhannes m zmölnig (zmoelnig)
Date: 2011-02-10 15:15

Message:
this happens as soon as you create the [pix_video] object?

Gem tries to set the bandwidth to 400 when it _open_s the device, but
should fall back to whatever the device gives, if FW400 is not supported.
but if the problem already occurs when creating [pix_video] (that is: when
initializing the dc1394 infrastructure), it will never reach that...

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