moviepy clip merging with python

Question

Iam trying to put each clip inside a file into one clip using moviepy library

from moviepy.editor import VideoFileClip, concatenate_videoclips
import os
import cv2

clips = []
    for filename in os.listdir(r'clips//'):
        clips.append(filename)

print(clips)

finalVideo = concatenate_videoclips(f'clips//{clips}')
finalVideo.write_videofile('finalVideo.mp4')

However, i get this error:

File "C:/Users/myalt/OneDrive/Desktop/pythonProject2/main.py", line 11, in <module>
    finalVideo = concatenate_videoclips(f'clips//{clips}')
  File "C:\Users\myalt\OneDrive\Desktop\pythonProject2\venv\lib\site-packages\moviepy\video\compositing\concatenate.py", line 71, in concatenate_videoclips
    tt = np.cumsum([0] + [c.duration for c in clips])
  File "C:\Users\myalt\OneDrive\Desktop\pythonProject2\venv\lib\site-packages\moviepy\video\compositing\concatenate.py", line 71, in <listcomp>
    tt = np.cumsum([0] + [c.duration for c in clips])
AttributeError: 'str' object has no attribute 'duration'

`clips` needs to be a list of video clips, not strings. – Tom Burrows Dec 17 '20 at 21:35 — Tom Burrows, Dec 17 '20 at 21:35
How would I go about doing this? – 8auuuuuer Dec 17 '20 at 23:59 — 8auuuuuer, Dec 17 '20 at 23:59

score 1 · Accepted Answer · answered Dec 18 '20 at 00:45

1

What about something like:

clips = []
clipPaths = [] #If you want to store the paths as well
for filename in os.listdir(r'clips//'):
    #clips.append(filename)
    clip = VideoFileClip(filename)
    clips.append(clip)
    clipPaths.append(filename)

https://zulko.github.io/moviepy/examples/quick_recipes.html

https://zulko.github.io/moviepy/getting_started/compositing.html

(May have to tweak the path)

answered Dec 18 '20 at 00:45

Twenkid

825
7
15

Thanks! works now, is there anyway to speed it up? its awfully slow – 8auuuuuer Dec 18 '20 at 01:04
1

You're welcome! I don't know how moviePy does it, I guess it renders it/reencodes the clips. If the clips have the same codecs and bitrates (e.g. from the same camera) and no trimming is needed, I'd use ffmpeg for that job, which can concatenate without reencoding. E.g. https://stackoverflow.com/questions/7333232/how-to-concatenate-two-mp4-files-using-ffmpeg I usually apply the method with the files: mylist.txt file '/path/to/file1' file '/path/to/file2' file '/path/to/file3' ffmpeg -f concat -safe 0 -i mylist.txt -c copy output.mp4 – Twenkid Dec 18 '20 at 01:14

moviepy clip merging with python

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