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I record my program until it closes.
Start Command:
cvlc screen:// --screen-left=0 --screen-top=0 --screen-width=1280 --screen-height=960 --screen-fps=30 \
--sout '#transcode{vcodec=mp2v, vb=800, scale=1, acodec=none}:file{mux=ts, dst=your_video_path_to_be_saved}'
Stop Command:
kill -9 pgrep vlc
That works well, now I need to implement pause method to this program. I need to kill program at pause method then start it on resume method and append new video to older one. How can i do it?
VLC Wiki: Merge
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You may be familiar with suspending a process that is running in the foreground by pressing CTRL-Z. It will suspend the process, until you type "fg", and the process will resume again.
First, find the pid of the running process using ps command. Then, pause it using kill -STOP <PID> , and then hibernate your system. Resume your system and resume the stopped process using command kill -CONT <PID> .
Description. PAUSE PROCESS suspends the execution of process until it is reactivated by the RESUME PROCESS command. During this period, process does not take any time on your machine. Even though a process may be paused, the process is still in memory.
You just literally type 'fg' (think foreground) and press enter. That brings the paused process back into the foreground and resumes running it.
You can use the STOP signal to pause a process, and CONT to resume its execution: What is if the process to be frozen is not a mere trivial program, but one that interacts with lots of other processes? Will this form of freezing a process work then also?
Suspend A Process And Resume It Later In Linux This is absolutely an easy! All you have to do is find the PID (Process ID) and using ps or ps aux command, and then pause it, finally resume it using kill command. Let us see an example.
First, find the pid of the running process using ps command. Then, pause it using kill -STOP <PID>, and then hibernate your system. Resume your system and resume the stopped process using command kill -CONT <PID>. Does this work after restarting my system?
As you can see, the updatedb process was stopped, pause and continued using the ‘kill’ command. Sometimes you want to stop all processes running a specified command, in this case the killall command can help you in make things much easier, so to stop all the updatedb processes you can use the command To restart it, you can use once again killall:
To pause the process
kill -STOP <PID>
To resume it
kill -CONT <PID>
Ctrl + z (SIGTSTP) from the shell stops (nowaday we will probably use the term "suspend", which the man page of bash does) a process. The process can be continued ("resumed") with the commands fg (in foreground) or bg (in background).
kill -9 doesn't stop a process, it kills it (SIGKILL). I mention it, because wording here is ambiguous.
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