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• Screen recorder in Ubuntu using python

  3 août 2013, par mridul

  I am a hobby programmer and trying to make screen-recorder in Ubuntu using python.
  Using this code able to take screenshot.

  import wx
  
  app = wx.App(False)
  
  s = wx.ScreenDC()
  
  w, h = s.Size.Get()
  
  b = wx.EmptyBitmap(w, h)
  
  m = wx.MemoryDCFromDC(s)
  
  m.SelectObject(b)
  
  m.Blit(0, 0, w, h, s, 0, 0)
  
  m.SelectObject(wx.NullBitmap)
  
  b.SaveFile("screenshot.png", wx.BITMAP_TYPE_PNG)

  And using loop I take more pictures and create video using these screen shots.My code is given bellow,

  import wx,os
  
  app=wx.App(False)
  
  s = wx.ScreenDC()
  
  w, h = s.Size.Get()
  
  b = wx.EmptyBitmap(w, h)
  
  m = wx.MemoryDCFromDC(s)
  
  i=0
  
  while i<50:
  
     m.SelectObject(b)
  
     m.Blit(0, 0, w, h, s, 0, 0)
  
     m.SelectObject(wx.NullBitmap)
  
     b.SaveFile('{0:05d}.png'.format(i), wx.BITMAP_TYPE_PNG)
  
     i+=1
  
  os.system('ffmpeg -f image2 -r 8 -i %05d.png -vcodec mpeg4 -y movie1.mp4')
  
  i=0  
  
  while i<50:
  
     os.remove('{0:05d}.png'.format(i))
  
     i += 1   `

  In above code I take 50 pictures and store as 00000.png to 00049.png and make video using ffmpeg.
  After creating video I delete all pictures.

  Current Problems :

  • Very small delay between screen shoots. If try to record videos using this code out put is not perfect.
  • For recording long time it is not efficient. It take lot of hard drive memory to store screen shoots. And use more CPU .

  What I do for get code more efficient ? Using pure python how to create video from pictures ? Is there any alternative methods to record screen ?
  I like to improve my code.

• Convert a video and capture a jpeg frame via ffmpeg php

  15 mai 2014, par HackerManiac

  Can anyone give a code on how do i covert a video using ffmpeg.

  As thought currently i have only uploading system.

  vu.php(only a part is shown)

  define('UPLOAD','../../videos/');
  
      $fileName = time().$file['name']; 
  
      $target = UPLOAD.$fileName;
  
  
  
    if(move_uploaded_file($file['tmp_name'],$target)){                
  
        exec("ffmpeg -i ".UPLOAD." ".UPLOAD.$filename.".flv"); 
  
    }

  This pice of code block just uploads the video on video folder but does not converts it to .flv.
  I am not sure how to use ffmpeg.

  My diretory looks like this

  www[localhost]->videos[videos folder]
  
  www[localhost]->pictures[pictures folder]
  
  www[localhost]->resources[folder]->php[folder]->vu.php

  I also want to return a .jpg image of any frame of video through json by converting via ffmpeg and uploading it to pictures folder.

  return json_encode(array("thumbnail"=>$image_src));

• Révision 105450 : correction coquille et correction des liens de forum interne

  25 juillet 2017, par gouz@root-me.org