Incorrect output when concatenate_videoclips two quicktime videos

[dingyaguang117]

Did'nt do any other operation. Just concatenate two VideoFileClip objects from .mov files.
Output shoud be
|----A(20s)-----|-------B(20s)------|
but I got
|--A(10s 2x speedup)--|--last frame of A(10s)--|--B(10s 2x speedup)--|--last frame of B(10s)--|

PS: I found that:

clip1 = VideoFileClip('54ffd8ab1b70b7072952200e.mov')
clip1.write_videofile('54ffd8ab1b70b7072952200e.mp4')

could show the bug.

[Zulko]

Can you provide the original video files and your code ? Also, your OS and python version (I don't think it's relevant, but we never know).

[dingyaguang117]

OSX 10.10.2 Python 2.7.5
origin files: https://www.dropbox.com/sh/e2xmdajuffbbgza/AABSSyQS2DHQWAtavYboedp1a?dl=0 (output is 2.mp4)

[dingyaguang117]

code is simple:

clip1 = VideoFileClip('/Users/ding/Documents/HuohuaWorkspace/Python/AppShow/website/uploads/54ffd8ab1b70b7072952200e.mov')
clip2 = VideoFileClip('/Users/ding/Documents/HuohuaWorkspace/Python/AppShow/website/uploads/54ffd8ab1b70b7072952200f.mov')
final_movie = concatenate_videoclips([clip1, clip2])
final_movie.write_videofile('/Users/ding/Documents/HuohuaWorkspace/Python/AppShow/website/movies/2.mp4', fps=12)

[dingyaguang117]

I convert .mov to .mp4 by ffmpeg(not auto installed by imageio) manually before concatenate_videoclips, and got correct output.

[keikoro]

@dingyaguang117 I'm assuming from your last comment that you managed to solve your issue. Because of that and because it's 3+ years old, I'm closing it now.