Artifacts in PlotnineAnimation

[AlFontal]

Whenever an animation of figures containing colorbars is generated and saved via PlotnineAnimation, an artifact with a repeated colorbar, centered at coordinates (0, 0), appears in the animation.

I would create a reproducible example but even the example used in the Plotnine docs shows this issue:

In cases like mine, however, it can become more annoying since the colorbar is horizontal and obstructs a part of the choropleth map I am showing:

My solution by now is to simply add a bottom margin to the plot and crop out the part with the artifact, but there has to be something in the animation module that causes this behavior that probably should be easy enough to fix?

[jeroenjanssens]

I can confirm this. Just want to add that the title and subtitle are not showing up in the animation. Here's one frame:

And here's a short animation:

https://github.com/has2k1/plotnine/assets/1368256/11a5223f-42af-4e59-9fe0-81739527227f

[jeroenjanssens]

A workaround for this would be to save each frame as an image and then use ffmpeg to stitch those images into a video. For the example in the documentation, that could be something like:

for frame, k in enumerate(np.linspace(kmin, kmax, num_frames)):
    plot(k).save(f"frames/{frame:06}.png")

! ffmpeg -y -framerate 10 -i frames/%06d.png -pix_fmt yuv420p -vcodec libx264 -crf 18 animation.mp4

https://github.com/has2k1/plotnine/assets/1368256/bdd45f2c-097a-4834-90fb-dafab1dd7c22