Call video_recorder Start & stop via topic
Hi,
I am using the video_recorder to save a video stream to a file using ros.This is the command I am using :
rosrun image_view video_recorder image:=/camera/image_raw _filename:="test.avi"
These are the messages in the terminal :
[ INFO] [1548243269.519044136]: Waiting for topic /camera/color/image_raw...
[ INFO] [1548243269.722238288]: Starting to record MJPG video at [640 x 480]@15fps. Press Ctrl+C to stop recording.
[ INFO] [1548243271.470604124]: Recording frame 52
Video saved as output.avi
Now, I want to call the video_recorder via Launshing Topic "start_topic" ,So I tried to call this funcition via subprocess.Peopen like that :
cmd = rosrun image_view video_recorder image:=/camera/image_raw _filename:="test.avi"
proc = subprocess.Popen(cmd, shell=True)
It works but I can't stop video_recorder. I want to stop recording via topic like the "start_topic".. I tried to kill the process ..use function subprocess.terminte() .. But it does not work.
Does anyone know what's wrong? Any Help to stop the record without tapping Ctr+C ?
I solve it , I hope this will help someone. I shared with everyone found it helpful: As was written above, I tried to kill proc.pid and it dosent work .. So,I tried to follow the PID with htop or
ps -axand i discover that am killing the wrong PID. The correct one is