I want to remove alternate frames from video strip in blender using python

Question

I write this code in blender to update the video strip so as to delete alternate frames from it and leave rest of the frames in video sequence editor but it removes first half of the strip instead of alternate frames. Please let me know where I am doing it wrong.

import bpy

# Set the name of your video strip
video_strip_name = "YourStripName"

# Get the video sequence editor
vse = bpy.context.scene.sequence_editor

# Find the video strip by name
strip = vse.sequences.get(video_strip_name)

if strip:
    # Create a new list to store the frames to be removed
    frames_to_remove = []

# Iterate through the frames and identify alternate ones
    for frame in range(strip.frame_final_start, strip.frame_final_end + 1):
      if frame % 2 == 0:
        # Add the frame index to the list
        frames_to_remove.append(frame)

 # Remove the identified frames from the beginning
   for frame_index in frames_to_remove:
    strip.frame_final_start += 1
else:
  print(f"Video strip '{video_strip_name}' not found.")

  print("Alternate frames removed successfully from the beginning!")

Answer 1

import bpy

# Set the name of your video strip
video_strip_name = "maserati red fron dof high.001"

# Get the video sequence editor
vse = bpy.context.scene.sequence_editor

# Find the video strip by name
strip = vse.sequences.get(video_strip_name)


start = int(strip.frame_start)
duration = int(strip.frame_duration)
end = int(start + duration)

print("start", start)
print("end", end)
print("duration", duration)

counter = 0

for (cut) in range(start, end):
    
    if cut % 5 == 0:
        
        counter += 1
    
        print('cut', end-cut)
        
        new_strip = strip.split(frame=end-cut, split_method='HARD')
        
        if counter % 2 == 1 and new_strip != None:
            bpy.context.scene.sequence_editor.sequences.remove(new_strip)
            
        if counter % 2 == 1 and new_strip == None:
            bpy.context.scene.sequence_editor.sequences.remove(strip)
        

Note: you should be honest - not only here, that makes things easier. And i am pretty sure that's why nobody answered you - and that's why you did get 3 downvotes (until now). Nevertheless - i believe people can learn from mistakes - that's why i do answer.

result demo:

https://github.com/luckychris/blender_gifs/blob/main/delete%20partial%20strips%20demo.gif

Note2: once there was a great feature in SE: gif upload. This enriched this community a lot because you could show e.g. working examples or results. Unfortunately SE "killed" that by their latest "upgrade" which i think is more a downgrade. But that's just my personal opinion.