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POpython 2.7 - subprocess control interaction with mpg123
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copied!<p>I asked a question related to this several weeks ago on here: <a href="https://stackoverflow.com/questions/17159627/python-mpg123-and-subprocess-not-properly-using-stdin-write-or-communicate">Python, mpg123 and subprocess not properly using stdin.write or communicate</a></p> <p>Thanks to help from there I was able to do what I needed at the time. (Didn't call q, but terminated the subprocess to stop it).## Heading ## Now though I seem to be in another bit of a mess.</p> <pre><code> from subprocess import Popen, PIPE, STDOUT p = Popen(["mpg123", "-C", "test.mp3"], stdout=PIPE, stdin=PIPE, stderr=STDOUT) #wait a few seconds to enter this, "q" without a newline is how the controls for the player work to quit out if it were ran like "mpg123 -C test.mp3" on the command line p.communicate(input='q')[0] </code></pre> <p>much like before, I need this to be able to quit out of mpg123 like it would be with it's standard controls (like press 'q' to quit, or '-' to turn volume down, '+' to turn volume up, etc), now I use the code above, which should theoretically work, and it works with similar programs. Does anyone know of a way I can use the controls built into mpg123 (the one accessible by using "mpg123 -C whatever.mp3") using a subprocess? terminate isn't enough anymore as I will need the controls ^_^</p> <p>EDIT: Many thanks to abarnert for the amazing answer =) ok, so the new code is simply a slightly modified version of abarnert's answer, however mpg123 doesn't seem to be accepting the commands</p> <pre><code> import os import pty import sys import time pid, fd = os.forkpty() if pid: time.sleep(5) os.write(fd, 'b') #this should've restarted the file time.sleep(5) os.write(fd, 'q') #unfortunately doesn't quit here =( time.sleep(5) # quits after this is finished executing else: os.spawnl(os.P_WAIT, '/usr/bin/mpg123', '-C', 'TEST file.mp3') </code></pre>

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