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Timestamp problem with Point Grey Flea3 USB3 camera #35

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Lenskiy opened this issue May 5, 2014 · 6 comments
Open

Timestamp problem with Point Grey Flea3 USB3 camera #35

Lenskiy opened this issue May 5, 2014 · 6 comments

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@Lenskiy
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Lenskiy commented May 5, 2014

Look at the output of this command rostopic echo /flea3_stereo/right/image_raw | grep secs

    secs: 36
    nsecs: 858272000
    secs: 36
    nsecs: 858272000
    secs: 36
    nsecs: 858272000
    secs: 36
    nsecs: 858272000
    secs: 36
    nsecs: 858272000
    secs: 36
    nsecs: 858272000
    secs: 36
    nsecs: 858272000
    secs: 36
    nsecs: 858272000
    secs: 36
    nsecs: 858272000

The timestamps do not change.
I am going to dig into this. Any help is appreciated.
Maybe it is something to do with this bug
https://code.ros.org/trac/ros-pkg/ticket/4841

@Lenskiy
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Lenskiy commented May 5, 2014

Adding the parameter use_ros_time: true allows to avoid the problem. The timestamps start to change. I believe the problem is related to USB section of the dc1394 library.

@jack-oquin
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I will be away for the next few days.

Your use_ros_time work-around is a good idea, and might be the best we can do at the driver level. I think it was originally introduced because of similar problems with other devices.

Perhaps the driver could detect that situation and set the parameter automatically.

@chadrockey
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@Lenskiy you might want to try https://github.com/ros-drivers/pointgrey_camera_driver to see if its a driver issue or something else.

@Lenskiy
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Lenskiy commented May 6, 2014

@chadrockey thanks a lot! This is a great package, somehow I missed it until now. Which place is more appropriate to ask questions about this package? I have troubles connecting two flea3 cameras at the same time.

@jack-oquin
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@Lenskiy: is this still a problem for you, or have you switched to using the Point Grey driver?

@Lenskiy
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Lenskiy commented Sep 2, 2014

I tried the Point Grey driver, but something did not work out for me. Do not remember exactly but I believe I could run of\r setup cameras as stereo rig. I am using camera1394 package since that time, did not change anything. I might try again the the Point Grey driver later this month.

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