Audio out of sync for combined DASH video

[ncugit-sec]

Expected Behavior

When editing segmented DASH video, it's common to encounter missing segments. These missing segments should be skipped during editing, mirroring the behavior of a video player.

1.mp4

Actual Behavior

Duplicate frames are inserted, but the audio does not correspond accordingly, resulting in audio being out of sync.

18426798262013490-full.mp4

Steps to Reproduce the Problem

18426798262013490.mp4

# Using above raw video
from moviepy.editor import VideoFileClip
clip = VideoFileClip('movie.mp4')
cvc = CompositeVideoClip([clip])
cvc.write_videofile('encoded.mp4')

Specifications

• Python Version: 3.11.4
• MoviePy Version: 1.0.3
• Platform Name: Ubuntu
• Platform Version: 22.04