Python script that uses the Blender Video Editor to automate image sequence plus audio into video file

bpy-editor.py

import os
import re
import sys
import bpy
import argparse
from pathlib import Path


def atoi(text):
    return int(text) if text.isdigit() else text


def natural_keys(paths):
    return [ atoi(c) for c in re.split(r'(\d+)', str(paths)) ]


def image_strip_add(sequence_editor, files):
    filepath, filename = str(files[0]), files[0].name
    imstrip = sequence_editor.sequences.new_image(filename, filepath=filepath, channel=1, frame_start=0)
    for file in files[1:]:
        imstrip.elements.append(file.name)
    imstrip.frame_final_duration = len(files)
    imstrip.update()


def sound_strip_add(sequence_editor, file):
	sequence_editor.sequences.new_sound(file, filepath=file, channel=1, frame_start=0)


if __name__ == "__main__":
    AUDIO_DEFAULT_PATH = os.path.abspath(os.path.join("..", "resources", "Sigma Male Theme Song.mp3"))
    IMAGES_DEFAULT_ROOT_PATH = os.path.abspath(os.path.join("..", "yt-comments-to-pngs", "out"))
    OUTPUT_DEFAULT_ROOT_PATH = os.path.abspath(os.path.join("..", "out"))

    parser = argparse.ArgumentParser(description='Generate video with bpy editor')
    parser.add_argument("--audio", type=str, default=AUDIO_DEFAULT_PATH, help="Path to music file")
    parser.add_argument("--imgs_dir", type=str, default=IMAGES_DEFAULT_ROOT_PATH, help="Path to images root dir")
    parser.add_argument("--out_dir", type=str, default=OUTPUT_DEFAULT_ROOT_PATH, help="Path to output root dir")

    args = sys.argv[sys.argv.index("--") + 1:]
    args = parser.parse_args(args)
    print(args)

	## SCENE SETUP ##
    bpy.context.scene.view_settings.view_transform = 'Standard'

    bpy.context.scene.frame_start = 0
    bpy.context.scene.frame_end = 34
    bpy.context.scene.frame_step = 1

    bpy.context.scene.render.fps = 1
    bpy.context.scene.render.fps_base = 8

    bpy.context.scene.render.image_settings.file_format = 'FFMPEG'
    bpy.context.scene.render.ffmpeg.constant_rate_factor = 'PERC_LOSSLESS'
    bpy.context.scene.render.ffmpeg.ffmpeg_preset = 'BEST'
    bpy.context.scene.render.ffmpeg.gopsize = 1
    bpy.context.scene.render.ffmpeg.audio_codec = 'MP3'

    ## Load images ##
    image_filepaths = list(sorted(Path(args.imgs_dir).glob("*.png"), key=natural_keys))
    n_images = len(image_filepaths)
    frame_step = 35

    for index, frame_start in enumerate(range(0, n_images, frame_step)):
        bpy.context.scene.render.filepath = os.path.join(args.out_dir, "part%d_" % index)

        ## Create editor ##
        bpy.context.scene.sequence_editor_clear()
        sequence_editor = bpy.context.scene.sequence_editor_create()

        ## Load audio ##
        sound_strip_add(sequence_editor, args.audio)

        current_filepaths = image_filepaths[frame_start:frame_start+frame_step]
        image_strip_add(sequence_editor, current_filepaths)

        ## Render ##
        bpy.ops.render.render(animation=True)