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• How do I resize my video ? in proportion (python)

  23 septembre 2022, par ggn0

  *I am sorry for my poor English. It's a translator.

  


  I used Python moviepy to resize it, but the pixels are broken. I want to make the video 9:16 ratio while maintaining the original image quality. (So that there are black frames on both sides)

  


  from moviepy.editor import *
c = VideoFileClip('test.mp4')
f = c.resize(newsize=(1080,1920))
f.write_videofile('aa.mp4')


  


  This code causes pixels to collapse.

  


  Let me show you an example picture.

  


  Original Video Example

  


  The video I want

  


  Pictures that come out using movie resize (other example pictures, pixels collapse and proportions collapse) Pictures that I don't want

  


  It doesn't have to be moviepy, so I'd appreciate it if you could tell me how to use Python. (PIL ? opencv ?)

  


  Thank you so much. Have a nice day 🙏

  


• 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.

• Hide ffplay window and just show input video [closed]

  5 mai 2023, par Scott Wilkerson

  I'm using FFMPEG/FFPLAY to display video on a monitor from a Decklink card. After much research I finally found a good command to get the video displayed correctly, and at a specific location in the monitor with no border :

  


  ffplay -f dshow -video_size 1280x720 -left 631 -top 19 -rtbufsize 702000k -framerate 59.94 -i video="Decklink Video Capture":audio="Decklink Audio Capture" -threads 2 -noborder

  


  The problem is I need to ONLY display the borderless input video. NOT ffplay running. I figured out I could use -nostats to get rid of the video statistics, but not the command prompt window.

  


  -nostdin DOESN'T WORK
-nodisp HIDES THE INPUT VIDEO, not the command prompt window.

  


  Thanks in advance !