feat: add CLI argument handling and build script

- Added command-line argument parsing to accept input file path instead of hardcoded value
- Added build task to compile standalone executable with deno compile
- Added usage message for incorrect invocation

LICENSE

@@ -0,0 +1,20 @@
+MIT License
+
+Copyright (c) 2025 Kessinen
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

@@ -0,0 +1,49 @@
+# dvdsubconvert
+
+A command-line tool built with Deno to extract, convert, and remux DVD subtitles
+from MKV video files into SRT format, then combine them back into a new MKV
+file.
+
+## Prerequisites
+
+Ensure the following tools are installed and available in your PATH:
+
+- [MKVToolNix](https://mkvtoolnix.download/) (provides `mkvmerge` and
+  `mkvextract`)
+- [FFmpeg](https://ffmpeg.org/)
+- [vobsub2srt](https://github.com/ruediger/VobSub2SRT) (for converting VobSub
+  subtitles to SRT)
+
+## Installation
+
+Clone the repository and ensure Deno is installed
+([Deno installation guide](https://deno.land/manual/getting_started/installation)).
+
+## Usage
+
+Run the tool with a single MKV file as input:
+
+```bash
+deno run --allow-run --allow-write --allow-read src/main.ts input.mkv
+```
+
+The tool will:
+
+1. Analyze the MKV file for subtitle tracks.
+2. Extract supported subtitle languages.
+3. Convert VobSub subtitles to SRT format.
+4. Remux the SRT subtitles into a new MKV file named `subit.mkv`.
+
+Supported languages (ISO 639-1 codes):
+
+- English (en)
+- Finnish (fi)
+
+## Output
+
+- `subit.mkv`: The resulting MKV file with converted SRT subtitles.
+- Temporary files (`.srt`, `.idx`, `.sub`) are cleaned up automatically.
+
+## License
+
+[Include license info from LICENSE file]

deno.json

@@ -1,6 +1,7 @@
 {
   "tasks": {
-    "dev": "deno run --watch --allow-run --allow-write --allow-read src/main.ts"
+    "dev": "deno run --watch --allow-run --allow-write --allow-read src/main.ts",
+    "build": "deno compile --allow-run --allow-write --allow-read --output dist/dvdsubconvert src/main.ts"
   },
   "imports": {
     "@std/assert": "jsr:@std/assert@1"

src/main.ts

@@ -1,7 +1,5 @@
 import { videoFile } from "./types.ts";
 
-const input = "/home/esa/Videos/tmp/3MUSKETEERS_D1_PAL/B3_t00.mkv";
-
 // TODO: Check if mkvmerge, ffmpeg and vobsub2srt are installed.
 
 const lang_codes = {
@@ -73,7 +71,7 @@ function cleanUp(languages: Record<string, string>) {
   }
 }
 
-async function main() {
+async function main(input: string) {
   const mkvmerge_output = subtitlesLookup(input);
   const languages_in_file: Record<string, string> = {};
   for (const track of mkvmerge_output.tracks) {
@@ -139,7 +137,13 @@ async function main() {
 }
 
 if (import.meta.main) {
-  main().catch((e) => {
+  const args = Deno.args;
+  if (args.length !== 1) {
+    console.error("Usage: deno run main.ts <input.mkv>");
+    Deno.exit(1);
+  }
+  const input = args[0];
+  main(input).catch((e) => {
     console.error(e);
     Deno.exit(1);
   });