How to Extract video from bag file?
Hi, I am using ROS hydro on Ubuntu 12.04. After using the command "rosrun image_view extract_images _sec_per_frame:=0.01 image:={IMAGE_TOPIC_IN_BAGFILE}" I'm having an error when executing"ffmpeg -r -b -i frame%04d.jpg .avi" The thing is I am not seeing the sequence of images after I play the bagfile.I ran "rosbag info" to obtain the topic in the bag file but when I run "rosrun rqtgraph rqtgraph" the /extract_image frame node is there all by itself.
When I follow the tutorials on http://wiki.ros.org/rosbag/Tutorials/... I get an error " [FATAL] [1394583654.335465840]: Error opening file: play".After replacing play by "--clock" or just removing "play" everything seemed to go just fine but there are no frames*.jpg in /home/.ros. I feel like I'm lacking something.Can anyone help?