commit 68247bf6158bc5af42995384cbf5f6c7b14edbe0
Author: tyler <tylergortakowski@gmail.com>
Date:   Thu Sep 11 14:31:16 2025 +0000

    Add main.py

diff --git a/main.py b/main.py
new file mode 100644
index 0000000..54fd888
--- /dev/null
+++ b/main.py
@@ -0,0 +1,99 @@
+import subprocess
+import json
+import os
+import glob
+
+def run_ffmpeg_cmd(cmd):
+    result = subprocess.run(cmd, check=True, capture_output=True, text=True)
+    return result.stdout.strip()
+
+# 1. Ask for directory
+input_dir = input("Enter the directory containing your .m4b files: ").strip()
+
+# Collect and sort files
+input_files = sorted(glob.glob(os.path.join(input_dir, "*.m4b")))
+if not input_files:
+    raise SystemExit("❌ No .m4b files found in that directory.")
+
+# 2. List files with numbering
+print("\nAvailable files:")
+for i, f in enumerate(input_files, 1):
+    print(f"[{i}] {os.path.basename(f)}")
+
+# 3. Ask user for start-end range
+user_range = input("\nEnter the range of files to merge (e.g. 1-10): ").strip()
+try:
+    start, end = map(int, user_range.split("-"))
+    selected_files = input_files[start-1:end]
+except Exception:
+    raise SystemExit("❌ Invalid range format. Use start-end (e.g. 1-5).")
+
+# 4. Ask for output name
+output_name = input("\nEnter the final audiobook name (without extension): ").strip()
+final_output = f"{output_name}.m4b"
+
+# 5. Extract metadata (for chapters & global tags)
+chapters = []
+current_start = 0
+global_tags = None
+
+for f in selected_files:
+    probe = subprocess.check_output([
+        "ffprobe", "-v", "quiet", "-print_format", "json",
+        "-show_format", "-show_streams", f
+    ])
+    meta = json.loads(probe)
+
+    # Duration
+    duration = float(meta["format"]["duration"])
+
+    # Title for chapter name (falls back to filename)
+    title = meta["format"]["tags"].get("title") if "tags" in meta["format"] else None
+    if not title:
+        title = os.path.splitext(os.path.basename(f))[0]
+
+    chapters.append({
+        "start": current_start,
+        "end": current_start + duration,
+        "title": title
+    })
+    current_start += duration
+
+    # Save global tags from the first file
+    if global_tags is None and "tags" in meta["format"]:
+        global_tags = meta["format"]["tags"]
+
+# 6. Write FFmetadata chapters file
+with open("chapters.txt", "w", encoding="utf-8") as f:
+    f.write(";FFMETADATA1\n")
+    if global_tags:
+        # Copy album/author/etc. from first file
+        for key, value in global_tags.items():
+            if key.lower() not in ["title", "name"]:  # don’t overwrite audiobook title
+                f.write(f"{key}={value}\n")
+
+    for ch in chapters:
+        f.write("\n[CHAPTER]\n")
+        f.write("TIMEBASE=1/1000\n")
+        f.write(f"START={int(ch['start']*1000)}\n")
+        f.write(f"END={int(ch['end']*1000)}\n")
+        f.write(f"title={ch['title']}\n")
+
+# 7. Create file list for ffmpeg concatenation
+with open("file_list.txt", "w", encoding="utf-8") as f:
+    for fpath in selected_files:
+        f.write(f"file '{os.path.abspath(fpath)}'\n")
+
+# 8. Concatenate into merged.m4b
+run_ffmpeg_cmd([
+    "ffmpeg", "-f", "concat", "-safe", "0", "-i", "file_list.txt",
+    "-c", "copy", "merged.m4b"
+])
+
+# 9. Add chapter metadata + final output name
+run_ffmpeg_cmd([
+    "ffmpeg", "-i", "merged.m4b", "-i", "chapters.txt",
+    "-map_metadata", "1", "-c", "copy", final_output
+])
+
+print(f"\n✅ Done! Created '{final_output}' with {len(chapters)} chapters.")