A script to create video from randomly selected videos on a folder. It's here for archive. concat function is so slow. There are solutions on the net

ffmpeg_pybindings.py

import os
import random
import ffmpeg

# Function to apply random color to text surrounded by symbols
def apply_random_color(text, symbol_colors):
    result = ""
    inside_symbol = False
    for char in text:
        if char == "#" or char == "/":
            inside_symbol = not inside_symbol
            color = random.choice(symbol_colors) if inside_symbol else "reset"
            result += f"\033[{color}m{char}\033[0m"
        else:
            result += char
    return result

# Function to overlay text on a video clip
def overlay_text(input_clip, output_clip, text1, text2, font_path):
    print(input_clip)
    ffmpeg.input(input_clip).output(
        output_clip,
        vf=f"scale=640:360,drawtext=text='{text1}':x=50:y=50:fontfile={font_path},drawtext=text='{text2}':x=100:y=100:fontfile={font_path}"
    ).run(overwrite_output=True)

# Set up some variables
input_clip_folder = "input_clips"
output_folder = "output_clips"
textlist1_file = "textlist1.txt"
textlist2_file = "textlist2.txt"
font_path = "OpenSans-Bold.ttf"
symbol_colors = ["31", "32", "33", "34", "35"]  # ANSI color codes

# Create output folder if it doesn't exist
if not os.path.exists(output_folder):
    os.makedirs(output_folder)

# Create a list to store the filtered video clips
filtered_clips = []

# Process 4 clips
for i in range(1, 5):
    # Randomly select a video clip
    input_clip = ".\\" + os.path.join(input_clip_folder, random.choice(os.listdir(input_clip_folder)))
    print(input_clip)
    # Randomly select text from text files
    with open(textlist1_file, "r") as f1, open(textlist2_file, "r") as f2:
        text1 = random.choice(f1.readlines()).strip()
        text2 = random.choice(f2.readlines()).strip()

    # Apply random colors to text
    text1 = apply_random_color(text1, symbol_colors)
    text2 = apply_random_color(text2, symbol_colors)

    # Generate output file name
    output_clip = ".\\" + os.path.join(output_folder, f"output_clip_{i}.mp4")
    print(output_clip)
    # Overlay text on the video clip
    overlay_text(input_clip, output_clip, text1, text2, font_path)

    # Add the filtered clip to the list for concatenation
    filtered_clips.append(output_clip)

# Concatenate the 4 filtered clips into a final output
concatenated_clips = ffmpeg.concat(*[ffmpeg.input(clip) for clip in filtered_clips])
final_output = "final_output.mp4"
concatenated_clips.output(final_output,movflags="+frag_keyframe+separate_moof+omit_tfhd_offset+empty_moov").run(overwrite_output=True)