fabbro's profile - activity

Did you find a solution to this problem? I am really interested.

Hi all,

I am trying to get a video from a compressed Image. I saved the data from the camera in a rosbag file called _2016-09-13-02-10-12.bag.

If I do :

rosbag info _2016-09-13-02-10-12.bag.

I get:

path:        _2016-09-13-02-10-12.bag
version:     2.0
duration:    5:10s (310s)
start:       Sep 13 2016 02:10:13.02 (1473725413.02)
end:         Sep 13 2016 02:15:23.30 (1473725723.30)
size:        1.3 GB
messages:    5380
compression: none [1520/1520 chunks]
types:       sensor_msgs/CompressedImage [8f7a12909da2c9d3332d540a0977563f]
topics:      /camera_2/image_raw/compressed   5380 msgs    : sensor_msgs/CompressedImage

So, I play the rosbag by:

rosbag play --pause _2016-09-13-02-10-12.bag

I try to record the video by:

rosrun image_view video_recorder image:="/camera_2/image_raw" _image_transport:="compressed"  _filename:="video.avi"  _max_depth_range:="0" _fps:="30" _codec:="I420"

But the result is that I get:

[ INFO] [1474033858.402189526]: Waiting for topic /camera_2/image_raw...

And every 10s I have something like:

[ WARN] [1474037302.946135179, 1473725424.251391530]: [image_transport] Topics '/camera_2/image_raw/compressed' and '/camera_2/camera_info' do not appear to be synchronized. In the last 10s:
    Image messages received:      153
    CameraInfo messages received: 0
    Synchronized pairs:           0

It doesn't do anything else If I do CTRL+C it tells me:

Video saved as video.avi

But there is no video saved.

I think the error is in the warning message.

Could you help me ?

Thanks.

I also went (stupidly) through this for a specific reason: I was using ubuntu 20.04 until few weeks ago and I use ROS2 i

I have the same problem. did you solve it?

Moreover, I would like to know what does it mean LEAF TOPIC in ROS because in the rqt_graph user interface there is the option HIDE LEAF TOPICS.

Could someone help me? Thanks a lot.

p.s. When I launch rqt_graph I have the feeling that it doesn't update properly and previous nodes are showed. Of Course I click on refresh time by time. Is there something else I can do?

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Thanks for your answer. Generators are indeed the first thing I am investigating since that's what I found browsing the

Improvement of allocation of big python list to custom message data field Short explanation: I am trying to use ROS2 to

did you find a solution?

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I was having the same error. My problem was that in the .msg file I had Header header instead of std_msgs/Header header.

Is there a way to see where the porting process is at now? Thanks

Did you source your setup.bash? WIth source /opt/ros/foxy/setup.bash

I am not sure that this is a good answer (to me it does not look too clean but maybe it is the only way out for now). I

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Dear All,

I want to print in a ROS WARNING a string. But I am not able to do that.

Someone of you could help me please?

What I am doing is the following:

std::string topicNameTrajInput ="TopicRos";

ROS_WARN(topicNameTrajInput);

Any ideas why this doesn't work? Thanks a lot.

what does it mean exactly: "the same pixel raster"?

I was trying to follow this Tutorial: http://wiki.ros.org/ROS/Tutorials/Ros...

And when There is written to do :

******@************:~$ rospack find 2dnav_pr2/move_base/2dnav_pr2.launch

I have the following error:

[rospack] Error: package '2dnav_pr2/move_base/2dnav_pr2.launch' not found

Someone could help me to solve this problem?

I know that probably it is an easy one but I am not able to go on.

Thanks for your help.

Hi,

I am using an ODROID-XU4 on a quadrotor. On the ODROID is running ROS. To the Odroid is also connected to a camera flea3 by PointGrey. I am launching the pointgrey node to connect to the camera and it is working fine.

I am not sure but it seems that when I increase the frequency of acquisition of the camera (from 30 Hz and greater) the quadrotor becomes a bit unstable. It does not happen all the time but sometime. Because I don't know where this behavior is coming from I thought that it could come from the CPU/RAM which are working too much.

For this reason I was thinking if there is some tool which enables to store a rosbag file which then can be easily plotted to check the allocation of RAM and CPU when the frequency changes.

Thanks in advance for your help.

Hi, do you know if this still holds for the current mavros version? Thanks!

Did you solve this error? I have the same problem.