Hangs if using ImageMagick to write_gif

[tankorsmash]

I'm using ImageMagick on Windows, and nothing seems to be happening after it prints 'Writing Gif' just after calling write_gif. For comparison, It takes about 5 seconds to generate the frames with ffmpeg and instantly writes the file, and although with imagemagick the frames are generated instantly, but the proc2.wait() in gif_writers.py hangs and ignores my CTRL+C presses.

This is likely an issue on my end, but the convert demo for converting the logo works fine.

Version: ImageMagick 6.9.0-0 Q16 x86 2014-11-14 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2014 ImageMagick Studio LLC
Features: DPC Modules OpenMP
Delegates (built-in): bzlib cairo freetype jbig jng jp2 jpeg lcms lqr pangocairo png ps rsvg tiff webp xml zlib

Using the latest version of moviepy off of pip (thanks for updating it!).

[Zulko]

Is your gif very big or very long ? If it is the case, can you make the experience with a shorter clip, and tell me if it works (if the process actually ends and produces a GIF ?). Otherwise it might be a real bug.

ImageMagick is extremely slow, if your gif has more than 100 average-sized frames it will take forever. You can either wait, or reduce the number of frames with fps=10, or use program='ffmpeg' in write_gif to assemble the gif with ffmpeg, which will be much faster.

[tankorsmash]

Ah that's probably it then, just ImageMagick being slow. I had assumed that
since the generation happened faster, the rest of it would be faster too.
I'll close this then, because if you do proc2.terminate after a few
minutes, a portion of the file is saved. Thanks.

On Sun, Nov 30, 2014 at 3:49 AM, Zulko notifications@github.com wrote:

If you gif very big or very long ? If it is the case, can you make the
experience with a shorter clip, and tell me if it works (if the process
actually ends and produces a GIF ?). Otherwise it might be a real bug.

ImageMagick is extremely slow, if your gif has more than 100
average-sized frames it will take forever. You can either wait, or reduce
the number of frames with fps=10, or use program='ffmpeg' in write_gif to
assemble the gif with ffmpeg, which will be much faster.

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