CODEWITHSUNDEEP
pythonsubprocessomxplayer
kknickkk
kknickkk

Reputation: 29

Send a character to subprocess.Popen

I'm trying to control omxplayer on the command line on my rpi3 using a python script, I call subprocess.Popen and to control it (eg. play/pause, increase/decrease volume, etc..) I should write a character to stdin (eg. p, +/-, etc..), the character is passed in send_signal as variable text, using communicate I can't control it, is there a better way?

EDIT: Also player.stdin.write(text); player.stdin.flush() doesn't work.

def start_music():
    player = subprocess.Popen(['omxplayer', songs[0]], stdout=subprocess.PIPE, stdin=subprocess.PIPE, stderr=subprocess.STDOUT)
    return player

def send_signal(player, text):
    player.communicate(text.encode('utf-8'))
    player.stdin.close()

trying with cat -e instead of omxplayer the output is:

why_dont_you work
test_input
test_input$
test_input2
test_input2$
a
a$

note that the first line somehow is not shown again

Upvotes: 1

Views: 1771

Answers (0)

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