On 27Aug2014 18:45, Crush <crushe...@gmail.com> wrote:
Hello, it has been a while and I hope I am sending to the correct email.
How would I go about running a conditional statement against the contents of
stderr. For instance, if "blah blah blah" is in stderr do X, else do Y.
#!/usr/bin/env python
import subprocess
from subprocess import PIPE
i = 0
while i < 10:
p = subprocess.call("avconv -v verbose -re -analyzeduration 1000 -i http://localhost:6498/ms2/1382097438004/0MediaPlayer+0+/octoshape+hVV+octolive.americaone.com+V+aone+V+live+V+ONECONNXT_DEMO1_HD_flv/aoneliveONECONNXTDEMO1HDflv -c:v rawvideo -c:a pcm_s16le -ar 48000 -f nut - | ./bmdplay -m 12 -f pipe:0",
shell=True)
i += 1
if i == 10:
print "Gave up"
The above code works and I get no tracebacks, however I need to add to it and
check the contents of stderr. Avconv by default sends the audio and video to
stdout, which then sends the signal to a capture card in the machine. Avconv
is sending the status of the broadcasted signal i.e. frames, time, fps, etc.
to stderr, which is displayed in the terminal.
Send stderr to a file, using a parameter like:
stderr=open('stderr.out', 'w')
in your call() call. Then open 'stderr.out' and look for the relevant
information.
Obviously in a "real" program you'd take care to make that a temporary file
with a unique name using the functions from the "tempfile" module, etc. But
make it work first.
Cheers,
Cameron Simpson <c...@zip.com.au>
The Few. The Proud. The Politically Incorrect. - Steve Masticola
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