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• How to convert multiple video files in a specific path outputvideo with the same video name

  31 janvier, par Oussama Gamer

  The following code to converts a one video from mp4 to avi using ffmpeg

  


  ffmpeg.exe  -i "kingman.mp4"  -c copy "kingman.avi"

  


  I need to convert multiple videos in a specific path. "outputvideo" with the same video name

  


  This is the my code that needs to be modified.

  


  from pathlib import Path
import subprocess
from glob import glob

all_files = glob('./video/*.mp4')

for filename in all_files:
     videofile = Path(filename)
     outputfile = Path(r"./outputvideo/")
     codec = "copy"
     ffmpeg_path = (r"ffmpeg.exe")

outputfile = outputfile / f"{videofile.stem}"

outputfile.mkdir(parents=True, exist_ok=True)

command = [
    f"{ffmpeg_path}",
    "-i", f"{videofile}",
    "-c", f"{codec}",
    "{outputfile}",]

process = subprocess.Popen(
    command,
    stdout=subprocess.PIPE,
    stderr=subprocess.PIPE,
    text=True,
    bufsize=1,
    universal_newlines=True)
process.communicate()


  


• What does -inf LUFS mean in the output of ffmpeg ?

  17 novembre 2020, par Bailey Brightman

  I've looked through the documentation but havent been able to figure out exactly what this means. Could it be an issue with the command I'm running ?

  


  Heres the command :
-i ${filePath} -af loudnorm=I=-16:dual_mono=true:TP=-1.5:LRA=11:print_format=summary -f null - 2>&1
And heres part of the output I'm getting :

  


  Output Integrated:    -inf LUFS
Output True Peak:    -17.2 dBTP
Output LRA:            0.0 LU
Output Threshold:    -70.0 LUFS


  


  I'm trying to use this information to ensure that audio is lower than a set LUFS Value

  


• How to make RedirectStandardOutput sends output while the process is running (realtime)

  19 février 2017, par Wayne

  I have this simple GUI for ffmpeg video convertion I made using VS2015 (visual basic)

  So far everything works except for the status text box where I want the current status to show while the conversion process is at work.

  Here is the code where I tried to capture the status

  'LET'S GET READY TO CONVERT
  
  ConvertProcessInfo.FileName = theApp
  
  ConvertProcessInfo.Arguments = theOptions
  
  
  
  'LET'S TRY TO CAPTURE STATUS
  
  ConvertProcessInfo.RedirectStandardError = True
  
  ConvertProcessInfo.RedirectStandardOutput = True
  
  ConvertProcessInfo.UseShellExecute = False
  
  ConvertProcessInfo.CreateNoWindow = True
  
  
  
  procFFMPEG.StartInfo = ConvertProcessInfo
  
  
  
  'LET'S CONVERT
  
  procFFMPEG.Start()
  
  
  
  Dim theStat As StreamReader = procFFMPEG.StandardError
  
  Dim theStatOut As String = theStat.ReadToEnd()
  
  txtProcessInfo.Text = theStatOut
  
  
  
  'LET'S WAIT FOR PROCESS TO EXIT
  
  procFFMPEG.WaitForExit()

  The problem, my status textbox only gets the status after the conversion is done, not during conversion. Only last/final status is returned.