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• When running python script background, the job always stops

  21 janvier 2021, par Jong Kyu Kim

  I wrote a python script, "download_vod.py" that runs a child process using subprocess module.

  


  download_vod.py

  


  #!/usr/bin/python

import subprocess
url = xxx
filename = xxx.mp4

cmd = "ffmpeg -i " + url + " -c:v copy -c:a copy " + "\"" + filename + "\""
proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, shell=True)
proc.wait()


  


  When I run foreground on a bash shell as below, it works fine and terminates properly

  


  


  ./download_vod.py

  


  


  But a problem occurs when I run the script background as below.

  


  


  ./download_vod.py&

  


  


  The script always stops as below.

  


  


  [1]+ Stopped download_vod.py

  


  


  If I resume the job as below, it resumes and terminates properly.

  


  


  bg

  


  


  I assume it is caused by running subprocess because it never happens without subprocess.

  


  Would you let me know what happens to the subprocess (child process) when I run the python script as background ? And how would it be fixed ?

  


• ffmpeg.js running extremely slow in iOS cordova (but fine in iOS safari ?)

  14 mai 2019, par PEWify

  I’m trying to create a phonegap app that converts videos into maybe 30 or so jpeg frames..
  This page converts a bigbuckbunny video into 30 frames > https://www.pewify.com/test/ (taken from https://bgrins.github.io/videoconverter.js/demo/)

  It runs fine on an iPhone x running iOS 12 in mobile safari, it takes about 12-15 seconds to complete, but the same code packaged into a iOS cordova app running on the same phone will take almost 160 seconds to complete (both end results the same, but almost 10x as long), it works fine for android browsers or an android cordova app though

  I’m using cordova android 7.0 and cordova ios 4.5.4 (phonegap cli-8.0.0) for the app

  I’ve tried removing all unneeded plugins with just the bare minimum code but to no effect, it still runs just as slow

  From what i understand phonegap is just using a webview similar to safari to render the app but in this case it works but much slower, on top of that the phone starts to get heated up (presumably doing some intensive CPU ?)

  Did read something about using WKWebview being faster in cordova instead but that messes up the app with lots of CORS and ’operation insecure" errors so have decided not to implement that for now (unless that is the solution ?)

  Hopefully someone can point me in the right direction as i’m not exactly sure what is the issue here as it works somewhat flawlessly in android (both chrome and phonegap) but only in iOS safari and not the phonegap app

• Révision 24359 : ne pas perdre le logo du site lors de la migration (running gag)

  30 juillet 2019, par cerdic -