ffmpeg连接被对等方重置

Question

I have a problem when using ffmpeg:

quite often my clients will have slightly dodgy internet connections but they subscribe to a service which is designed to record a stream that they are hosting, and record it for hosting on something like a wordpress site.

ffmpeg is called by a python script. I would like, ideally, to know if ffmpeg will throw an exception or return a value that can be accessed by the python script and used as a variable to determine if there was a problem recording the audio.

at the moment python calls ffmpeg using:

os.system('ffmpeg -i [stream address] -t 1:00 -acodec copy ')

when I simulate a connection loss (turning off the NIC on the virtual machine) ffmpeg prints to the terminal

Connection reset by peer

Answer 1

So not a direct answer, but a suitable method for getting the desired response, written in pseudocode in order to make it easily understandable:

finishTime = timeNow + recordingDuration
call RecordFunction (source, destination, finishTime)

def RecordFunction (source, destination, finishTime):

    calculate recording duration with simple arithmetic

    ffString([Build the ffrecording strin])
    run.commandLine(ffstring)
    timeLeft = finishTime - timNow
    if timeLeft > tollerance:
        call RecordFunction(source, destination, finishTime)

optionally one can check the ffmpeg log and pass that to a log file. Or one can set a limit on the number of disconnects occurring.

Answer 2

As per documentation of os.system:

"On Unix, the return value is the exit status of the process encoded in the format specified for wait(). Note that POSIX does not specify the meaning of the return value of the C system() function, so the return value of the Python function is system-dependent."