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• how to get the desktop location of the user

  15 mars 2020, par amit9867

  I am making a python script to merge a audio and video file through FFMPEG the code shown below is working perfectly fine but what i want to do is the (path) which i provided is of my desktop location but if somebody else will run this code then they will get error. so how can i give a universal path for desktop for any computer

  import os
  
  import subprocess
  
  import tkinter as tk
  
  
  
  root = tk.Tk()
  
  os.chdir('C://Users/ravir/desktop/') # how to get the users desktop location 
  
  def merge():
  
    global p
  
    p =subprocess.Popen('ffmpeg -i video.avi -i audio.wav -c copy -shortest output.mkv' ,stdin=subprocess.PIPE)
  
  
  
  
  
  rec_btn = tk.Button(text='Start merging', width=20, command=merge)
  
  rec_btn.pack()
  
  
  
  
  
  root.mainloop()

• Adjust Audio Start Point by 3 Frames

  11 mai 2022, par craigeley

  Because of an issue with my audio recorder, I have audio files that are always 3 frames behind the start of my video files, even though they have identical timecode. Currently, I am overcoming this issue by using -itsoffset, like so :

  


  ffmpeg -i video.MP4 -itsoffset 0.12512513 -i audio.WAV -c:a aac -map 0:v:0 -map 1:a:0 new.mp4


  


  Where 0.12512513 is 3 divided by 23.976. The results of this are satisfactory, but is contingent on all of my footage being shot in 23.976.

  


  However, since I spoke to tech support for the device and they assured me it will always be off by exactly three frames, I'm wondering if there is a faster and more universal way to do this, either a) a command like -itsoffset that accepts frames as a starting point, or if the better solution is to just cut off the first three frames of the video, which would also put them in sync. I have tinkered with trim=start_frame=3 but I can't figure out the correct position to place it within the command.

  


  Any advice from experienced ffmpeg'ers would be much appreciated !

  


• NGINX RTMP convert flv to hls ?

  3 mai 2016, par MandelDuck

  I have a server that takes an rtmp stream and saves it as flv.

  Web users can view the flv video in their browser, however iPhone users can’t as it is flash

  Is there away to convert the saved flv files on the fly to hls for the iPhone viewers ?

  here is my config, Webusers access the vod application

  rtmp {
  
       server {
  
               listen 1935;
  
               chunk_size 4096;
  
  
  
               application live {
  
                       live on;
  
                       record all;
  
                       record_path /videos/av;
  
                       idle_streams off;
  
               }
  
               application audio {
  
                       live on;
  
                       record audio;
  
                       record_path /videos/audio;
  
                       idle_streams off;
  
  
  
               }
  
               application vod {
  
                       play /videos/av;
  
               }
  
               application aod {
  
                       play /videos/audio;
  
               }
  
  
  
       } 
  
  }