Bugs item #3177361, was opened at 2011-02-10 14:02 Message generated for change (Comment added) made by nusmuk You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=507079&aid=3177361...

Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. 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: Cyrille Henry (nusmuk)

Date: 2011-02-11 11:25

Message: ok, i find the solution. adding : dc1394_video_set_operation_mode(m_dccamera,DC1394_OPERATION_MODE_1394B); before setting speed to 800 solve the problem. so i've go an image. i don't know to make this to work with both FW400 and FW800 device...

i still have a small problem : the device is not properly closed. after quitting pd, i have to unpluged it if i want to use it again. (the green led is blinking after closing pd, just like when grabbing is on).

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Comment By: Cyrille Henry (nusmuk) Date: 2011-02-11 10:56

Message: if i change line 269 of file videoDC1394.cpp from dc1394speed_t speed=DC1394_ISO_SPEED_400; to dc1394speed_t speed=DC1394_ISO_SPEED_800; iv've got more information about why this speed can't be allocated in the terminal :

libdc1394 error: An ISO speed >400Mbps was requested while the camera is in LEGACY mode. Please set the operation mode to OPERATION_MODE_1394B before asking for 1394b ISO speeds libdc1394 error: Error: Failed to allocate iso bandwidth libdc1394 error: Error: Failed to setup DMA capture

i just don't know how to do that. any help is apreciated in order to make this work for this camera.

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Comment By: Cyrille Henry (nusmuk) Date: 2011-02-10 15:08

Message: well, i did not have other cam connected when i tried this, so pix_video tried all backend at the initialization. so, i now have a v4l device on the computer. when creating pix_video : no messages regarding 1394. (only a message that say pix_video open a v4l2 device).

sending driver dc1394 gives in the terminal : libdc1394 error: Error: Failed to allocate iso bandwidth libdc1394 error: Error: Failed to setup DMA capture and in pd log : error videoDC1394: Generic failure: failed to enumerate

then, sending device /dev/raw1394 did not change anything.

if i do the other order : recreate pix_video, sending device /dev/raw1394, i've got an error that say V4L can not open this device. then sending driver dc1394 print nothing.

the camera is in FW800, the computer have only a FW800 port...

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Comment By: IOhannes m zmölnig (zmoelnig) Date: 2011-02-10 14:15

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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