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• How to create multiple subclips of a video with unixtimestamps from a json ?

  9 mars 2016, par Dynamic

  Problem :
  I want to trim a video file based on start-time and end-time from json data. There are multiple start & end times and the video needs to be trimmed and then the final parts appended.

  I tried using MoviePy by assigning the unix timestamps to a var and then converting to MM:SS using datetime.

  How can i do this for multiple values as such the script goes thru all the dicts and trims the video as per the data ?

  Is MoviePY good enough for this job or is there any other efficient lib / way out there ?

  What i tried :

  from moviepy.editor import *
  
  import datetime
  
  
  
  
  
  start_time = int(datetime.datetime.fromtimestamp(int("1456229360")).strftime('%S'))
  
  end_time =  int(datetime.datetime.fromtimestamp(int("1456229334")).strftime('%S'))
  
  print start_time
  
  print end_time
  
  
  
  
  
  my_clip = VideoFileClip("sample.mp4")
  
  
  
  #Trims the video as per the processed timestamps
  
  clip1 = my_clip.subclip(start_time,end_time) #and select the subclip 00:00:00 - 00:00:00
  
  
  
  #Append the trimmed parts.
  
  
  
  #final_video = concatenate([clip1,clip2,clip3]) #How to do this ?
  
  
  
  processed_vid = clip1.write_videofile("final_sample.mp4")
  
  
  
  with open('output.json', 'r') as f:
  
      timestamps = json.load(f)

  Sample Json Data :

  [
  
      {
  
          "accl": 1.5899999999999999, 
  
          "duration": 19, 
  
          "end_time": 1434367730, 
  
          "start_time": 1434367711
  
      }, 
  
      {
  
          "accl": 0.7670000000000012, 
  
          "duration": 14, 
  
          "end_time": 1434368618, 
  
          "start_time": 1434368604
  
      }, 
  
      {
  
          "accl": 0.7129999999999992, 
  
          "duration": 11, 
  
          "end_time": 1434368692, 
  
          "start_time": 1434368681
  
      }, 
  
      {
  
          "accl": 0.5970000000000013, 
  
          "duration": 13, 
  
          "end_time": 1434367605, 
  
          "start_time": 1434367592
  
      }
  
  ]

  Update :
  I tried doing something else, i am getting there but i need help in mass conversion of these timestamps as moviepy accepts only HH:MM:SS and not unixtime, and with creating subclips on basis of this.

  from moviepy.editor import *
  
  import datetime
  
  import json
  
  
  
  clips_array = []
  
  
  
  video= VideoFileClip('sample.mov')
  
  
  
  
  
  with open('output.json', 'r') as f:
  
      timestamps = json.load(f)
  
      for timestamps in f:
  
          clip = full_vid.subclip(start_time, end_time)
  
          clips_array.append(clip)

• How can i set an audio file for video clip with moviepy without re encoding

  12 février 2023, par not me

  So far i tried :

  


  from moviepy.editor import *
videoclip = VideoFileClip("filename.mp4")
audioclip = AudioFileClip("audioname.mp3")

new_audioclip = CompositeAudioClip([audioclip])
videoclip.audio = new_audioclip
videoclip.write_videofile("new_filename.mp4")


  


  But it takes very long time.
I'd like to do it without re encoding. i also prefer opening video or audio clip from bytes in moviepy

  


• looking to download ffmpeg 32-bit windows with developer files (libs, dlls, headers)

  26 juillet 2023, par Peter

  I can't find a 32-bit version of ffmpeg for Windows with developer files anywhere. When I say "developer files" I mean avcodec-xx.dll, avcodec.lib, avcodec.h, et cetera.

  


  Is there something available online other than the source code ?