This script adds an effect color strip in the VSE then adds an image above it. I want to add a gamma cross strip so I can do a fade in. The trouble is there doesn't seem to be a way to select sequence strips by name. It seems odd that there isn't the ability to so something so simple. Is there a way to do it or some work around?

    import bpy
    import os           
    import operator     

    class CustomPanel(bpy.types.Panel):
        bl_label = "OpenSource::Classicism XL"
        bl_space_type = "SEQUENCE_EDITOR"
        bl_region_type = "UI"
        bl_options = {'DEFAULT_CLOSED'}

        def draw(self, context):
            def add_label():
                row = self.layout.row()
                row.label("Intro Directory")

            def add_import_button():
                col = self.layout.split().column(align = True)
                col.operator("sequencer.add_intro" , text= "Import")



    class Add_Intro(bpy.types.Operator):
        bl_idname = "sequencer.add_intro"
        bl_label = "Add Intro"

        def execute(self, context): 

            selection = []

            def add_sequence_to_list():

            def select_strip(x):
                bpy.context.scene.sequence_editor.sequences_all[image_file_list[0]].use_translation = True

            def add_splash_screen():
                start = 1
                end = 90
                channel = 2
                directory = "C:\\Users\\...\\"
                files = [{"name":"your_image.png"}]
                bpy.ops.sequencer.image_strip_add(directory=directory, files=files, frame_start=start, frame_end=end, channel=channel)

            def add_background_color():
                start = 1
                end = 91
                channel = 1

                bpy.ops.sequencer.effect_strip_add(frame_start=start, frame_end=end, channel=channel, type='COLOR')

            def add_fade_in():
                start = 1
                end = 90
                bpy.ops.sequencer.effect_strip_add(frame_start=1, frame_end=90, type='GAMMA_CROSS')


            return {'FINISHED'}

    def register():

    def unregister():

    if __name__ == "__main__":

1 Answer 1


Sequences API methods.

Can use API methods of class bpy.types.Sequences, from the instance scene.sequence_editor.sequences to add new strips to the VSE. As a "rule of thumb" I avoid using operators whenever possible. Using the API methods can reference the returned strip on creation, eg a new image strip: image_strip = sequences.new_image(...) removing the need to reference the strip by name at all.

Test script, adds an image strip on channel 1, a color strip on channel 2 and a gamma cross effect strip on channel 3. The color strips color is set to red. The gamma cross script uses the other two as input.

import bpy

context = bpy.context
scene = context.scene
sed = scene.sequence_editor
sequences = sed.sequences
# add an image strip
filepath = "/home/batfinger/Pictures/BGLTest.png"
frame_start = 1
frame_end = 90
# add an image strip.
image_strip = sequences.new_image("Image", filepath, 1, frame_start)
# give it a duration
image_strip.frame_final_end = frame_end

color_strip = sequences.new_effect("Color", 'COLOR', 2,

color_strip.color = (1, 0, 0)

gamma_strip = sequences.new_effect("GammaX", 'GAMMA_CROSS', 3,

Can reference a strip by name via sequences[name] I like to use sequences.get(name) as it will return None if a strip of that name does not exist.

If an image strip with same name is added twice, eg image_strip = sequences.new_image("Image", ...) again, the new strip will get the suffix "Image.001" naming. (Using the operator will do same thing, but with filename.) Can be sure of the name of new strip with image_strip.name.

An issue with your q script is what is image_file_list.

  • $\begingroup$ This is great! I was looking for this in bpy.types but the auto completing didn't show that as an option even when I pressed s. Never thought of using capital S. It should exist in the autocomplete without pressing s first. image_file_list is from another script that I wrote that imports a sequence of images, centers and zooms it to screen. It worked so I thought maybe I could borrow some of that code. To no avail. $\endgroup$ Feb 21, 2018 at 2:05

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.