[ros-users] image_proc doesn't work with camera1394

Eric Perko wisesage5001 at gmail.com
Sun Mar 28 00:18:07 UTC 2010


Thanks for the update. Could you post a launch file that works for
you, grabbing just whatever the first camera plugged in is? I updated
my version of camera1394 and verified that both /image_raw and
/camera_info had nonzero timestamps, but image_proc topics still won't
output anything using the launch file I specified in the original
report. I'm going to try it on another system using a clean boxturtle
install (I run latest on my laptop); if you have a system running
latest instead of boxturtle, could you give it a shot and let me know
if it still runs there?

- Eric

On Sat, Mar 27, 2010 at 7:34 PM, Jack O'Quin <jack.oquin at gmail.com> wrote:
> On Sat, Mar 27, 2010 at 4:24 PM, Jack O'Quin <jack.oquin at gmail.com> wrote:
>> On Sat, Mar 27, 2010 at 2:57 PM, Eric Perko <wisesage5001 at gmail.com> wrote:
>>> Has anyone else been able to get any 1394 camera working with
>>> image_proc using either camera1394 or an older 1394 driver?
>> Yes!
>> I just noticed that camera1394 was publishing a zero time stamp.
>> (Didn't we used to get warnings about that?).
>> A quick fix to set the time stamp before publishing, and it works now
>> for me. I'll commit this one-line fix to SVN shortly. Please give it a
>> try (and thanks again for the bug report, Eric).
> Note that this was just a quick hack using ros::Time::now().
> I see that some versions of libdc1394 can return a timestamp for the
> actual image capture. This is obviously better, I'll see if I can get
> that to work reliably. If I can, I'll set that in the message header.
> --
>  joq
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