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• Error opening ffmpeg subprocess in Python

  16 mai 2015, par Hyperion

  What I want to do is opening a ffmpeg process in Python. My code look like this :

  import subprocess
  
  import os
  
  
  
  def Main():
  
      ffmpeg = "C:\ffmpeg\bin\ffmpeg.exe"
  
      args = " -i C:\video.mp4 -r 1 -f image2 C:\FRAMES\frame-%03d.jpg"
  
      subprocess.Popen(ffmpeg + args).wait()
  
  
  
  Main()

  But even in this simple form I got always the same error :

  Traceback (most recent call last):
  
    File "C:/Users/Francesco/Desktop/test.py", line 9, in <module>
  
      Main()
  
    File "C:/Users/Francesco/Desktop/test.py", line 7, in Main
  
      subprocess.Popen(ffmpeg + args).wait()
  
    File "C:\Users\Francesco\Desktop\WinPython-64bit-2.7.9.4\python-2.7.9.amd64\lib\subprocess.py", line 710, in __init__
  
      errread, errwrite)
  
    File "C:\Users\Francesco\Desktop\WinPython-64bit-2.7.9.4\python-2.7.9.amd64\lib\subprocess.py", line 958, in _execute_child
  
      startupinfo)
  
  WindowsError: [Error 2] Impossibile trovare il file specificato
  
  >>> 
  
  </module>

  What’s wrong ?

• ffmpeg with zoom, combine video & audio

  30 août 2021, par P Jewellery

  I have 4 input,

  


  

  1. Main video (No audio in the video)

  


  2. logo.png (always stay on top right corner)

  


  3. image.jpg (Locate at the end of video, Have different ratio with main video)

  


  4. audio.mp3 (The only audio input)

  


  


  The below code helped me to edit the main video.

  


  for %%a in ("*.mp4") do c:\ffmpeg.exe -i "%%a"  
-filter_complex " 
[0:v]trim=0.13:2.5, setpts=PTS-STARTPTS [v0]; 
[0:v]trim=0.13:2.5, reverse,setpts=PTS-STARTPTS[v1]; 
[0:v]trim=28.5:31, reverse,setpts=PTS-STARTPTS [v2]; 
[0:v]trim=28.5:31,setpts=PTS-STARTPTS [v3]; 
[0:v]tpad=stop_mode=clone:stop_duration=2, trim=0.13:31,setpts=0.5*PTS-STARTPTS [v4];
[0:v]trim=30.95:31,tpad=stop_mode=clone:stop_duration=5,setpts=PTS-STARTPTS [v5]; 
[v0][v1][v2][v3][v4][v5]concat=n=6:v=1:a=0[out]" -map "[out]" "%%~dpnaf.mp4"


  


  However, I want to

  


  


  1. add a logo at top right of the video throughout the whole video.

     


  


  2. add an image.jpg at the end of my edited main video.

     


  


  3. add the audio.mp3 throughout the whole final output video. (duration depends on the video.)

     


  


  4. apply a continuous zoom in for [v0]&[v1] (Since v1 is reverse of v0, after the zooming, ending image of v1 is bigger than starting image of v0, so v0,v1 looks like a smooth zoom in video)

     


  


  


  "scale=2160x2160,zoompan=z='min(max(zoom,pzoom)+0.01,5.0)':x='iw/2-(iw/zoom/2)':y='ih/2-(ih/zoom/2)':d=125:s=2160x2160",


  


  and a continuous zoom out for [v3] & [v4]

  


  All the about to be able to run through a single bat file.

  


• does movie filter in ffmpeg 4.3.1 support png format picture

  1er janvier 2021, par TONY

  I use ffmpeg's moive filter to add wartermark on my video.
The str is "const char *filter_descr = "movie=test.png:seek_point=3.2, scale=180 :-1, setpts=PTS-STARTPTS [over] ;[in] setpts=PTS-STARTPTS [main] ;[main][over] overlay=16:16 [out]" ;"
it shows that can't find codec, but if the wartermark picture is bmp ,then it's ok.
I found that the png code exists in ffmpeg, it should support png decoder.