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import gradio as gr
from PIL import Image
import tempfile
def reverse(input_path, frames_per_second):
# Open the GIF file
gif = Image.open(input_path)
# Get the number of frames in the GIF
num_frames = gif.n_frames
# Create a list to hold the reversed frames
reversed_frames = []
# Iterate through the frames in reverse order
for frame_number in range(num_frames, 0, -1):
gif.seek(frame_number - 1)
frame = gif.copy()
reversed_frames.append(frame)
# Interesting blur effect on gifs with transparent background
if 'duration' not in gif.info:
# Default is 8 frames per second from AnimatedDiff
duration = frames_per_second * num_frames
gif.info['duration'] = duration
# Save the reversed frames as a new GIF
with tempfile.NamedTemporaryFile(suffix=".gif", delete=False) as temp_file:
temp_filename = temp_file.name
reversed_frames[0].save(temp_filename, save_all=True, append_images=reversed_frames[1:],
duration=gif.info['duration'], loop=0)
return temp_filename
def reverse_gifs(input_paths, frames_per_second):
if input_paths is None:
return None, None
input_paths = [f.name for f in input_paths]
temp_filenames = []
for input_path in input_paths:
temp_filenames.append(reverse(input_path, frames_per_second))
return input_paths, temp_filenames
with gr.Blocks(theme='gstaff/sketch') as demo:
gr.Markdown(value='# GIF Reversing Tool')
with gr.Row():
with gr.Column(scale=1):
gr.Markdown('## Load animated gifs to reverse')
image_in = gr.Files(label="Input Gif Files", type='file', file_types=['.gif'])
frame_rate = gr.Number(label="Frames per Second to use (if not in gif metadata)", value=8, minimum=1,
maximum=360, step=1, interactive=True)
image_display = gr.Gallery(label="Input Images", interactive=False)
with gr.Column(scale=1):
gr.Markdown('## View the reversed gif')
image_out = gr.Gallery(label="Reversed Gif Images")
clear_button = gr.ClearButton(components=[image_in])
image_in.change(reverse_gifs, [image_in, frame_rate], [image_display, image_out])
gr.Examples(examples=[[['./example.gif'], 8]],
inputs=[image_in, frame_rate], outputs=[image_display, image_out], fn=reverse_gifs, cache_examples=True)
with gr.Accordion('Developer Notes:', open=False):
gr.Markdown('This gif reverser is a simple utility I made for myself.\n\n'
'The default of 8 frames per second works for the default settings of [AnimateDiff](https://github.com/continue-revolution/sd-webui-animatediff).\n\n'
'Future enhancements could be to auto-determine the framerate when otherwise not available in the gif metadata.')
if __name__ == '__main__':
demo.launch()
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