Subj : Re: Python help...
To   : Dr. What
From : paulie420
Date : Sun Sep 06 2020 13:48:27

 DW> Not part of your question, but I don't see the reason to get the video
 DW> list all the time, then go through the video list to get the last one to
 DW> play.
 DW> 
 DW> I suggest putting this code outside the While loop.  Then when the
 DW> button is pressed, just pick a random number and play the video at that
 DW> location in the list of videos.

Thanks, that is good information and a suggestion that I can actually
understand and implement. I get it.

 DW> os.system runs a command, then waits for it to complete before
 DW> continuing.
 DW> 
 DW> So, if you want the button to be deactivated while the video is playing,
 DW> then os.system is the way to go.
 DW> 
 DW> subprocess.Popen is used to execute a process, but makes it easier for
 DW> you to communicate with the subprocess.  But it also allows you to run
 DW> the process in the "background" (i.e. once you run it, it returns
 DW> immediately - but now you have to manage the process, poll it
 DW> periodically, etc.)
 DW> 
 DW> IHMO, unless you are already very familiar with Linux and subproceses, I
 DW> suggest
 DW> that you do not use this.

Well, ok... I might have to learn about subprocesses; because the
subprocess.Popen sounds like the way to go. Also, sounds like by polling and
whatnot I could pass further commands to omxplayer WHILE the video is
running. (Like q, quit, fastforward, etcetc...) 

Anyway, the Popen sounds like it would fit me more - but is a higher
knowledge function. I'm gonna have to learn sometime.. thanks for explaining
it a BIT anyway.

 DW>  pa> but #didnt work YET. The os.system does play a video... just waits
 DW>  pa> there before #listening again for a button press.
 DW> 
 DW> Then the issue is with omxplayer.  It's not exiting when it's done
 DW> playing the video.

No, it exits when done... I just want to be able to push the button again
before its done. I did figure it out, a different way which I'll try to post
here shortly. :P

 DW> 

Thanks, Dr What. I appreciate your post.



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