#image_clips is a list of ImageClip() objects
#working
faded_clips = [ CompositeVideoClip([clip.fx(transfx.crossfadein, 2).fx(transfx.crossfadeout, 2)]) for clip in image_clips]
faded_video = concatenate(faded_clips, method="compose")
faded_video.write_videofile('faded_video.mp4', fps=24)
#Not working
slided_clips = [ CompositeVideoClip([clip.fx( transfx.slide_out, 2, 'bottom')]) for clip in image_clips ]
slided_video = concatenate(slided_clips, method="compose")
slided_video.write_videofile('slided_video.mp4', fps=24)
slided_video.mp4 генерируется без ошибок, но не имеет никакого эффекта.