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• moviepy ffmpeg stderr to tkinter interface

  1er avril 2018, par Alexander Perlman

  Hi stackoverflow community,

  I’m a novice python hobbyist. I wrote a python / ffmpeg script using moviepy that batch concatenates videos. I then designed an interface using tkinter.

  Now I want to redirect the stderr output from FFMPEG to the tkinter interface so that users can review the progress directly in app instead of needing the Sublime text console.

  I’ve done a lot of research but I’m in way over my head. Any tips would be greatly appreciated.

  Here’s the moviepy component. The gui is pretty cut and dry

  #import video clips 
  
  mainvid = VideoFileClip(fullpath, audio=True)
  
  intro = VideoFileClip("intro.mp4", audio=True)
  
  black = VideoFileClip("black1s.mp4", audio=True)
  
  
  
  #concatenate video clips 
  
  final = concatenate_videoclips([black, intro, mainvid, black]) final.fps=24 
  
  
  
  #actually write file 
  
  final.write_videofile(output, audio=True, audio_fps=48000, ffmpeg_params=[ "-r","24000/1001", "-b:v", "50M", "-level:v", "4.1", "-c:a", "libvo_aacenc", "-b:a", "256K", "-colorspace", "bt709"])

• ffmpeg - How to estimate CRF for h264 video target size

  10 septembre 2022, par the_RR

  According to the x264 encode documentation, in the CRF topic, it is informed that for every 6 additional points, the file size is reduced by approximately 50%.

  


  From this statement, it is assumed that the CRF has an exponential influence in reducing the final size of the video. But what is the exponential ratio ?

  


  I wouldn't want to use CRF18 with max-rate adjusted to reach a final size, as maxrate damage complex video scenes more strongly, as bitrate reduction via max_rate is not uniform, but it hits the scenes that require the highest bitrate first.

  


• moviepy ruining video after combining them

  1er juin 2020, par jjakeryan

  I'm trying to make a program that downloads videos from TikTok and combines all the separate videos into one .mp4 file and moves the final video to a folder on my desktop. I've been able to make it download all the videos and when I watch the separate videos they play fine however when I combine the videos some of the videos are messed up and look like this but the audio is fine.

  



  #slecting all .mp4 files
    video_files = glob.iglob("*.mp4")

    print(video_files)
    clips = []

    for clip in video_files:  # For each mp4 file name
        clips.append(VideoFileClip(clip))  # Store them as a VideoFileClip and add to the clips list

    today = date.today()

    final = concatenate_videoclips(clips)  # Concatenate the VideoFileClips
    final.write_videofile(f"{today}.mp4", codec="libx264")


#moving completed video to folder on desktop
    shutil.move(f'{today}.mp4', '/Users/jacobmarrandio/Desktop/done_videos/')


  



  thanks for any help