Progress bar newline error in Jupyter

[jarmitage]

Problem

1. Progress bar works fine initially:

2. Stop the process (using toolbar) and get a huge KeyboardInterrupt dump:

3. Run again and the progress bar prints to a new line:

Code

import moviepy.editor as mpy
import os

clip1 = mpy.VideoFileClip("a.mp4").subclip(10,15).set_pos((0,0)).set_start(0)
clip2 = mpy.VideoFileClip("a.mp4").subclip(20,25).set_pos((0,1080)).set_start(5)
clip3 = mpy.VideoFileClip("a.mp4").subclip(30,35).set_pos((0,2160)).set_start(10)

comp = mpy.CompositeVideoClip([clip1, clip2, clip3], size=(3000,3240))

Versions

• Jupyter 4.4.0, Notebook 5.4.0, Lab 0.31.12 (same problem in Notebook as Lab)

Comments

• Is this somehow related to this issue? "\r" acts as "\n" in notebook's output jupyterlab/jupyterlab#1104
• Perhaps with tqdm, this is needed from tqdm import tqdm_notebook as tqdm? (stackoverflow)
• Perhaps this flag could be used with clip.ipython_display? Progress bar #128

Thanks for any support in advance!

[jarmitage]

I was able to solve this problem by switching to tqdm_notebook at these locations:

moviepy/moviepy/Clip.py

Line 486 in db9e5f8

return tqdm(generator(), total=nframes)

moviepy/moviepy/audio/AudioClip.py

Line 83 in cd80d62

return tqdm(generator(), total=nchunks)

If using Jupyter Lab this requires installing the extension: jupyter labextension install @jupyter-widgets/jupyterlab-manager: http://ipywidgets.readthedocs.io/en/latest/user_install.html#installing-the-jupyterlab-extension

[Zulko]

This would also be solved by my other library Proglog, which allows users to specify whether they want console/notebook/web progress bars. @tburrows13 I just saw that you pushed a commit related to progress callbacks, does that exclude proglog ?

[tburrows13]

@Zulko, no the commit I just pushed was to solve merging conflicts in #701 so that it could be used as a workaround before we implement a proper solution. I still haven’t done anything with Proglog yet, but I think I will.

[keikoro]

Any progress on this? (Not sure how to tag this...)

[danmash]

#740 (comment)
is there a way to do this with no modification of the source?

[tburrows13]

Proglog support has been added as of v1.0. See #1020.