Recherche avancée

Sur d’autres sites (7775)

• variable length of segments in HLS

  12 août 2019, par shubham vashisht

  I am using FFmpeg to create a hls streaming manifest from a audio file.
  So far i can break the audio file into several segments based on the duration. Let’s say 10. But the requirement is to break audio file in such way that first few segments are of lesser size say 4 seconds and following segments of 10 seconds long.
  I am calling ffmpeg from a python script like this

      result = subprocess.Popen(['ffmpeg -y -i {}  -acodec copy -f segment -segment_time {} -segment_list {}.m3u8 {}%03d.ts'.format(pathToDownloadedMediaFile, 10, mediaFileName,mediaFileName)],stdout=subprocess.PIPE,stderr=subprocess.STDOUT, shell=True)

  is there any way to create first few segments of different duration than the rest ?

• How do I timestamp an excel document using Pandas ?

  16 juillet 2015, par Andy Do

  I have a script that uses FFMPEG and CMD to cut video files based off of an excel document row by row. I would like python to add a timestamp after it is done with a row. Can you guys please help ?

  import subprocess as sp, pandas as pd
  
  
  
  ffmpeg = 'C:/FFMPEG/bin/ffmpeg.exe' # on Windows
  
  datafile = r'C:\Users\A_Do\Dropbox\1. Projects\2. Python\TM Creator\tm_creator_test1.xlsx'
  
  
  
  xl = pd.ExcelFile(datafile,index = False)
  
  df = xl.parse('Sheet1')
  
  
  
  def create_tm():
  
      row_iterator = df.iterrows()
  
       # take first item from row_iterator
  
      for i, row in row_iterator:
  
          infile = row['filename']
  
          outputfile = row['outputfilename']
  
          timein = row['timein']
  
          duration = row['duration']
  
          decision = row['Create TM?']
  
          if decision == "Y":
  
              sp.call(ffmpeg + " -y -i " + infile + " -map 0:0 -map 0:1 -map 0:2 -acodec copy -ss " + str(timein) + " -codec copy -t " + str(duration) + " " + outputfile,shell=True) #this works
  
  
  
          elif decision != decision: #this gets rid of the NaN
  
              break
  
          else:
  
              print "You said you didn't want to make a TM for " + str(infile)
  
  
  
  create_tm()

  Thanks !

  My final code :

  import subprocess as sp, pandas as pd
  
  # (1) new import
  
  from openpyxl import load_workbook
  
  # (2) new import
  
  from datetime import datetime
  
  
  
  ffmpeg = 'D:/FFMPEG/bin/ffmpeg.exe' # on Windows
  
  datafile = r'D:\Dropbox\1. Projects\2. Python\TM Creator\tm_creator_test1.xlsx'
  
  
  
  # (3) open the file in openpyxl first:
  
  book = load_workbook(datafile)
  
  
  
  xl = pd.ExcelFile(datafile,index = False)
  
  df = xl.parse('Sheet1')
  
  
  
  def create_tm():
  
      row_iterator = df.iterrows()
  
       # take first item from row_iterator
  
      for i, row in row_iterator:
  
          infile = row['filename']
  
          outputfile = row['outputfilename']
  
          timein = row['timein']
  
          duration = row['duration']
  
          decision = row['Create TM?']
  
          if decision == "Y":
  
              sp.call(ffmpeg + " -y -i " + infile + " -map 0:0 -map 0:1 -acodec copy -ss " + str(timein) + " -codec copy -t " + str(duration) + " " + outputfile,shell=True) #this works
  
              # (4) Wherever in the code you want to put the timestamp:
  
              df.loc[i, 'Timestamp'] = str(datetime.now())
  
              # (5) This saves the sheet back into the original file, without removing
  
              # any of the old sheets.
  
              writer = pd.ExcelWriter(datafile)
  
              writer.book = book
  
              writer.sheets = dict((ws.title, ws) for ws in book.worksheets)
  
              df.to_excel(writer, index=False)
  
              writer.save()
  
          elif decision != decision: #this gets rid of the NaN
  
              break
  
          else:
  
              print "You said you didn't want to make a TM for " + str(infile)

• How to add blurred border on top and bottom based on the video

  5 avril 2023, par Noob69

  I am trying to modify a video to 1080x1920 scale and I want to add to the borders on top and bottom, a blurred version of the video based on the pixel on the edge.

  


  import subprocess

input_file = "my_video1.mp4"
output_file = "my_video_processed1.mp4"

command = f'ffmpeg -i {input_file} -vf "scale=1080:1920:force_original_aspect_ratio=decrease,pad=1080:1920:(ow-iw)/2:(oh-ih)/2,eq=saturation=2.0:gamma=1.2:contrast=1.2,unsharp=lx=5:ly=5:la=0.5:cx=5:cy=5:ca=0.5" -c:v libx264 -preset slow -crf 18 -c:a copy {output_file}'
subprocess.call(command, shell=True)



  


  I tried
mode = replicate, however it is not working for the latest version of ffmpeg from Windows builds by BtbN.