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    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
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    26 avril 2011, par

    The table below is the list of Linux distributions compatible with the automated installation script of MediaSPIP. Distribution nameVersion nameVersion number Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
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    2 mai 2011, par

    The examples below are representative elements of MediaSPIP specific uses for specific projects.
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  • Subprocess call stopping asynchronously-executed Python parent process

    6 mai 2016, par Suriname0

    The following shell session demonstrates the behavior I am seeing :

    [user@compname python-test]$ cat test.py
    
#!/usr/bin/env python
    
import subprocess
    
from time import sleep
    
proc = subprocess.Popen("ffmpeg", stdout=subprocess.PIPE, stderr=subprocess.STDOUT, shell=True)
    
print "Starting process: " + str(proc)
    
status = proc.poll()
    
while status is None:
    
    print "Process still running."
    
    sleep(0.01)
    
    status = proc.poll()
    
print "Status: " + str(status)
    
[user@compname python-test]$ python test.py
    
Starting process: 
    
Process still running.
    
Process still running.
    
Status: 1
    
[user@compname python-test]$ python test.py &
    
[4] 6976
    
[user@compname python-test]$ Starting process: 
    
Process still running.
    
Process still running.
    
[4]+  Stopped                 python test.py
    
[user@compname python-test]$ ps
    
  PID TTY          TIME CMD
    
 4684 pts/101  00:00:00 python
    
 4685 pts/101  00:00:00 ffmpeg
    
 7183 pts/101  00:00:00 ps
    
14385 pts/101  00:00:00 bash

    As you can see, when the simple test Python program is run normally, it completes successfully. When it is run asynchronously (using &), the Python process is stopped as soon as the subprocess call is complete (and poll() would return a non-None value).

    1. The same behavior occurs when using Popen.wait()
    2. The behavior is unique to ffmpeg.
    3. Both the Python process and ffmpeg are ending up stopped, as seen in the call to ps.

    Can someone help me detangle this behavior ? I don’t see anything in the documentation for the subprocess module, bash’s & operator, or ffmpeg that would explain this.

    The Python version is 2.6.6, bash is GNU bash version 4.1.2(1)-release (x86_64-redhat-linux-gnu), ffmpeg is version 3.0.1-static.

    Thank you for any help !

  • how to kill process in linux which was not killed

    3 juin 2013, par R Square

    Hi I am developing a application in linux for which I am writing a shell script to run ffmpeg and it was working fine but when i want to kill the process of ffmpeg it was not working

    kill 2628

    where 2628 is my process id

  • How to get first 16 fames from a video using ffmpeg ?

    5 mai 2021, par SRI VINOD PALACHARLA

    I have a video mp4 file(5 seconds duration), it has 125 frames. I need to extract first 16 continuous frames into a folder. Can you please put the code for extracting first 16 frames ?

    


    I tried -

    


    cmd = 'ffmpeg -i {} -frames:v 16 {}/%d.png'.format('/content/drive/MyDrive/MTP/train/X/X0.mp4', '/content/drive/MyDrive/MTP/sample') 
subprocess.call(cmd, shell = True)


    


    and it worked.

    


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