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diff --git a/build/blog/2014-10-23-ripping-copy-protected-dvd-with-mpv.html b/build/blog/2014-10-23-ripping-copy-protected-dvd-with-mpv.html new file mode 100644 index 00000000..db6664f0 --- /dev/null +++ b/build/blog/2014-10-23-ripping-copy-protected-dvd-with-mpv.html @@ -0,0 +1,57 @@ +<!DOCTYPE html> +<html> +<head> +<meta charset="utf-8"/> +<meta content="pandoc" name="generator"/> +<meta content="Zhiming Wang" name="author"/> +<meta content="2014-10-23T20:03:22-0700" name="date"/> +<title>Ripping copy-protected DVD with mpv</title> +<link href="/img/apple-touch-icon-152.png" rel="apple-touch-icon-precomposed"/> +<meta content="#FFFFFF" name="msapplication-TileColor"/> +<meta content="/img/favicon-144.png" name="msapplication-TileImage"/> +<meta content="width=device-width, initial-scale=1" name="viewport"/> +<link href="/css/normalize.min.css" media="all" rel="stylesheet" type="text/css"/> +<link href="/css/theme.css" media="all" rel="stylesheet" type="text/css"/> +</head> +<body> +<div id="archival-notice">This blog has been archived.<br/>Visit my home page at <a href="https://zhimingwang.org">zhimingwang.org</a>.</div> +<nav class="nav"> +<a class="nav-icon" href="/" title="Home"><!--blog icon--></a> +<a class="nav-title" href="/"><!--blog title--></a> +<a class="nav-author" href="https://github.com/zmwangx" target="_blank"><!--blog author--></a> +</nav> +<article class="content"> +<header class="article-header"> +<h1 class="article-title">Ripping copy-protected DVD with mpv</h1> +<div class="article-metadata"> +<time class="article-timestamp" datetime="2014-10-23T20:03:22-0700">October 23, 2014</time> +</div> +</header> +<p><strong><em>11/02/2014 update:</em></strong></p> +<p>See <a href="/blog/2014-11-02-vobcopy-dvdbackup-etc.html">this post</a> for issues, explanations, and more.</p> +<hr/> +<p><strong><em>10/25/2014 update:</em></strong></p> +<p>I'm such an idiot. <code>vobcopy</code> is the real, hassel-free way to go.</p> +<pre><code>brew install vobcopy</code></pre> +<p>Then, with the DVD mounted,</p> +<blockquote> +<p><strong>vobcopy</strong> without any options will copy the title with the most chapters into files of 2GB size into the current working directory.</p> +</blockquote> +<p>Of course there are a ton of options, but I generally hate to browse through options unless I have to, so I'm happy with calling without argument.</p> +<hr/> +<p>Yesterday I was trying to rip a music video off a newly released DVD from Japan. I knew very little about how DRM (in this case, CSS) actually works and how to break it. I tried to operate directly on the VOB file with <code>ffmpeg</code> or <code>mpv</code> but both failed with a lot of header errors — I suppose more files than the VOB are required for authentication? Whatever, maybe I’ll learn the details in the future, but I don’t see the need since DVD is an outdated technology anyway.</p> +<p>So, can we proceed from here? Most certainly. I noticed that although <code>mpv</code> won’t let me play a single VOB, I can simply hand it the DVD mount point, and it will play the whole DVD seamlessly. <strong>Caution:</strong> <code>mpv</code> needs to be compiled with <code>libdvdnav</code> and <code>libdvdread</code>! With brew you just do</p> +<pre><code>brew install mpv --with-libdvdnav --with-libdvdread</code></pre> +<p>For better performance and backup, I first cloned the DVD into a <code>.cdr</code> image (DVD/CD-R Master Image) using Disk Utility (I've never tried creating/cloning image with <code>diskutil</code> CLI, so nothing to report on that). Then I mount the image, say the mount point is <code>/Volumes/UPBX_80165</code>. As said I can hand that mount point to <code>mpv</code> and it simply works, but how about extracting the MPEG-2 video stream? The <code>--stream-capture=<filename></code> option is there just for you. In principle <code>--stream-dump=<filename></code> should also work, but without monitoring the output and controlling where to end, I’m not sure if it will ever terminate itself when reading from a DVD (when I stream captured the DVD it just kept repeating itself until I explicitly quit with <code>q</code>). So that's it:</p> +<pre><code>mpv --stream-capture=dump.mpg /Volumes/UPBX_80165</code></pre> +<p>Then you can torture the <code>dump.mpg</code> with <code>ffmpeg</code> however you want. The most obvious thing is to cut out the music video part, and put into a new container like MPEG-TS. Or transcode it to H.264 for your iPhone. The nice thing about <code>dump.mpg</code> is that, unless I got it wrong, there's no quality loss here — the only thing you got rid of is that goddamn DRM.</p> +</article> +<hr class="content-separator"/> +<footer class="footer"> +<span class="rfooter"> +<a class="rss-icon" href="/rss.xml" target="_blank" title="RSS feed"><!--RSS feed icon--></a><a class="atom-icon" href="/atom.xml" target="_blank" title="Atom feed"><!--Atom feed icon--></a><a class="cc-icon" href="https://creativecommons.org/licenses/by/4.0/" target="_blank" title="Released under the Creative Commons Attribution 4.0 International license."><!--CC icon--></a> +<a href="https://github.com/zmwangx" target="_blank">Zhiming Wang</a> +</span> +</footer> +</body> +</html> |