// GIF Videos to Slack

// Adjust Contrast Settings before running
// run("Enhance Contrast", "saturated=0.35");

Stack.getDimensions(width, height, channels, slices, frames);

ds_space=4; // Spatial Downsample Factor
ds_time=5;	// Temporal Downsample Factor

// New Dimensions
dsw = floor(width/ds_space); 
dsh = floor(height/ds_space);
dsf = floor(frames/ds_time); 

// Resize
run("Size...", "width=&dsw height=&dsh depth=&dsf constrain average interpolation=Bilinear");

run("Animation Options...", "speed=200 first=1 last=&dsf");
//run("Animation Options...", "speed=500");