scripts/make-video.py

import argparse, os, subprocess, sys, glob
from pathlib import Path

parser = argparse.ArgumentParser()
parser.add_argument('--images-dir', required=True)
parser.add_argument('--audio', default='')
parser.add_argument('--output', required=True)
parser.add_argument('--fps', type=int, default=24)
parser.add_argument('--duration-per-image', type=float, default=3.0)
args = parser.parse_args()

image_exts = ('*.png', '*.jpg', '*.jpeg', '*.webp')
images = []
for ext in image_exts:
    images.extend(sorted(glob.glob(os.path.join(args.images_dir, '**', ext), recursive=True)))

if not images:
    print(f"ERROR: No images found in {args.images_dir}")
    sys.exit(1)

print(f"  Images: {len(images)} files")
os.makedirs(os.path.dirname(args.output), exist_ok=True)

# Create video with ffmpeg
# Each image displayed for N seconds, then concat
ffmpeg = "ffmpeg"
if os.name == 'nt':
    ffmpeg = "ffmpeg.exe"

cmd = [ffmpeg, '-y']

# Input each image
for img in images:
    cmd.extend(['-loop', '1', '-i', img])

# Use concat demuxer for simpler reliable approach
# Create temp file listing all images with duration
concat_file = os.path.join(os.path.dirname(args.output), '_concat.txt')
with open(concat_file, 'w') as f:
    for img in images:
        f.write(f"file '{img}'\n")
        f.write(f"duration {args.duration_per_image}\n")

cmd = [ffmpeg, '-y', '-f', 'concat', '-safe', '0', '-i', concat_file]

# Scale to 1920x1080
cmd.extend(['-vf', 'scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080:(ow-iw)/2:(oh-ih)/2,fps=24',
            '-c:v', 'libx264', '-preset', 'medium', '-crf', '23'])

# Add audio if provided
if args.audio and os.path.exists(args.audio):
    cmd.extend(['-i', args.audio, '-c:a', 'aac', '-b:a', '128k', '-shortest'])
else:
    cmd.extend(['-an'])

cmd.extend(['-pix_fmt', 'yuv420p', '-r', str(args.fps), '-preset', 'medium', args.output])

print(f"  Running: {' '.join(cmd[:4])} ...")
result = subprocess.run(cmd, capture_output=True, text=True)

if result.returncode == 0:
    size = os.path.getsize(args.output)
    print(f"  -> Video saved: {args.output} ({size/1024/1024:.1f} MB)")
else:
    print(f"  ERROR: {result.stderr}")
    sys.exit(1)