Blender's F5 Flash equivalent

AddEmptyFrames.py

import bpy

# Get the selected object
selected_object = bpy.context.object

# Check if an object is selected and it has an active action
if selected_object and selected_object.animation_data and selected_object.animation_data.action:
    # Get the current frame marker position
    current_frame = bpy.context.scene.frame_current
    
    # Get the action and iterate through the F-Curves
    action = selected_object.animation_data.action
    for fcurve in action.fcurves:
        # Iterate through the keyframes and move keyframes to the right by 1 frame
        for keyframe in fcurve.keyframe_points:
            if keyframe.co.x > current_frame:
                keyframe.co.x += 1

    # Update the UI to reflect the changes
    bpy.context.scene.update()

    print("Keyframes moved to the right by 1 frame after the marker.")
else:
    print("No valid object or active action found.")