ImageSequence

Tom Ritchford edited this page May 13, 2017 · 1 revision

class bibliopixel.drivers.image_sequence.ImageSequence

ImageSequence is a crude driver, designed primarily for the creation of this documentation. It is in a "good enough" state now and will likely be updated in the future if the need presents itself.

Its main purpose to to output each generated frame to an image file on disk. If desired, the sequence of images can then be processed into an animated GIF with a tool like ImageMagick. There is no preservation of the timing between each frame since it, currently, does not output directly to a GIF, only separate PNG files.

__init__

(num = 0, width = 0, height = 0, pixelSize = 10)

  • num - Number of pixels to be displayed.
  • width - Optional: Width of display buffer. If using Matrix, its width property will automatically be set from this value.
  • height - Optional: Height of display buffer. If using Matrix, its height property will automatically be set from this value.
  • pixelSize - Width and height to render each pixel in the final image. Effectively a scale value for the image output.

writeSequence

(output, clear = True)

  • output - Directory to write image sequence to.
  • clear - True will cause the image sequence buffer to be cleared after writing out the sequence. Prevents previous frames from being written out on next call to this method.

Writes the current frame buffer out to images on disk. Images are named 0000.png, 0001.png, 0002.png, etc. This should be called after the animation completes, so the animation must not run forever. After the images have been written, the following ImageMagick command could be used to generate an animated GIF:

convert -delay 25 -loop 0 *.png animation.gif

This will create a GIF with a 250ms delay between each frame (-delay 25) and loops forever (-loop 0).

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