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Glossary: Matroska Multimedia Container (.MKV)

July 9th, 2008 | No Comments | Posted in Glossary

From Wikipedia:

The Matroska Multimedia Container is an open standard free Container format, a file format that can hold an unlimited number of video, audio, picture or subtitle tracks inside a single file. It is intended to serve as a universal format for storing common multimedia content, like movies or TV shows.

Fun Fact:

Matroska is an English word derived from the Russian word “matryoshka” (Russian: матрёшкаIPA[mɐˈtrʲoʂkə]), which means “nesting doll” (the common Russian egg-shaped doll within a doll).

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Glossary: Dolby Digital (AC-3)

July 8th, 2008 | No Comments | Posted in Glossary

From Wikiedia:

Dolby Digital, or AC-3, is the common version containing up to six discrete channels of sound, with five channels for normal-range speakers (20 Hz – 20,000 Hz) (right front, center, left front, right rear and left rear) and one channel (20 Hz – 120 Hz) for the subwoofer driven low-frequency effects. Mono and stereo modes are also supported. AC-3 supports audio sample-rates up to 48kHz.

Fun Facts:

Batman Returns was the first film to use Dolby Digital technology when it premiered in theaters in Summer 1992. The LaserDisc version of Clear and Present Danger featured the very first Home theater Dolby Digital mix in 1995.

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Review: Handbrake (DVD rip software for the Mac)

July 8th, 2008 | No Comments | Posted in Reviews, Software Review

The HandBrake icon.The largest barrier in getting your media to your hard drive is having an application that can convert, or “rip” the content of a movie DVD and save it to a file on your computer for playback later through the computer itself or an attached media device such as an Xbox 360, or Apple TV.

One of the most versitle, free tools available on OSX for encoding DVDs into video files is Handbrake, an open-source and free software package.  It is an extraordinarily handy piece of software and is easy to use, to boot.

After downloading and installing via the traditional means, you are presented with a dialog box asking you to point Handbrake towards its input.  This can be either a DVD in your drive, an image file of a DVD, or a Video_TS directory of a pre-ripped DVD sitting on your hard drive.  Once selected, the program will analyze the data to figure out movie length and sound options, then pop up with the main encoding window.  While seemingly complex at first, this window is the key to your future encoding successes and has a handy set of Presets that are available under a button at the top right of the screen.  These Presets can take away a lot of the pain of figuring out what the various controls do by balancing quality and size, via preselected options designed to fit your targeted viewing device.

We here at My Media Delivered have had pretty good success in mating Xbox 360s with Macs (via 360 Connect), so if that is your device set as well, please by all means shoot for the Xbox 360 Preset.  This gives you decent video quality at about 650 megabytes per hour of content.  Other Presets will give varying degrees of quality at big and smaller filesizes (for instance, the iPod Preset will give you drastically smaller filesizes but at reduced quality level… however, don’t worry, on an iPod screen, videos encoded with this preset look great due to their small size, hence, diminishing the flaws).

Handbrake can encode MPEG4 videos (using FFMPEG or Xvid encoding) and H.264 video.  It can also passthrough Dolby Digital (AC3) soundtracks or downconvert to stereo.  Don’t worry if you don’t know what these terms mean… the presets will take good care of you. Anyone willing to tinker with the settings will find they can enhance the quality of their DVD rips by enabling 2 pass encoding, or by increasing the bit rate (the rate of compression).

Currently Handbrake is the best way to get your DVD media turned into those 1′s and 0′s that your hard drive reads. Give it a shot.

Handbrake supports the following devices with presets:

  • Apple TV
  • iPhone/iPod Touch
  • iPod
  • PlayStation 3
  • PSP
  • Xbox 360

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How To: Convert your .MKV DTS audio to AC3 on the Mac for Apple TV

July 8th, 2008 | 9 Comments | Posted in How To

Why would you need this:

Most movies you download from the internet will be in .MKV container format with .h264 video and DTS Surround audio. While the Apple TV can play .h264 video, it cannot play DTS sound, nor can it do this from an .MKV container format. This post will show you how to convert an .MKV into a format that will play on a non-hacked Apple TV maintaining the surround sound.

Prerequisites:

How To:
  1. Download CrossOver and run the installation. (Can be run in Demo mode)
  2. Make a folder on your desktop called “DTS Converter.” (This is where we’ll be placing the windows utilities and doing the conversions.)
  3. Once CrossOver is running, you can copy the downloaded MKV Audio Converter (AudioConverter.EXE) to the “DTS Converter” folder on your desktop.
  4. Double click AudioConverter.EXE, this will launch the application and it will begin to download a few tools that it requires to do the conversion (the MKV audio extractor, the AC3 encoder, and the merging application). Once this new download completes it automatically installs the files and configures the converter application to use them.
  5. On the MKV Tools tab of the application, in the File specification area, select your source file, and target file name. It’s helpful if you rename the target file so that you do not overwrite the source (in case you need to attempt another conversion for some reason).
  6. Check mark the “DTS: Audio Output Parameters”, and select “Convert to Dolby Digital”, uncheck “Preserve DTS track” as you will no longer need it. Uncheck “VORBIS: Audio Output Parameters” as this will not be needed.
  7. You should be ready to convert at this point.  Press the “Run” button under “File specification”.  The conversion of the audio should be fairly quick depending on the speed of your computer and compared to converting video.
  8. Once completed, you should end up with a new MKV file that has an AC3 audio track. We’re not done yet!
  9. Install the Perian codec (make sure you go to the control panel after it’s installed and press the “install codecs” button to activate all the codecs).  Reboot.
  10. Open Visual Hub, drag your newly created MKV with AC3 onto the Visual Hub window.  Change the presets to Optimize for Apple TV 5.1, set the quality to Go Nuts, and check the box H.264 Encoding.
  11. Select a destination for the file and press the start button.
  12. If you have a fast computer, you’ll be done in a few hours.  You’ve now got your movie in the correct format.  But there’s one last thing.  For some reason Visual Hub does not set the AC3 channels properly.  You’ll have to open the original MKV with AC3 inside Quicktime, and go to the window menu and select “Show Movie Properties”, select the AC3 track, then press the “Audio Settings” tab.  Note the channel assignments for all the speaker channels. (1 left, 2 right, 3 center, and so on). Write these down and close the file.
  13. Now open your newly created Apple TV MOV file that Visual Hub created inside Quicktime.  Also go to the window menu and select “Show Movie Properties”, select the AC3 track, then press the “Audio Settings” tab. Click each channel assignment and reassign the tracks to the same settings that were in the MKV AC3 file.  Save your file.
  14. You’re done!  Copy your file to iTunes, and enjoy your HD/AC3 movie on your Apple TV.
NOTE: Since the conversion takes place with Windows software, this conversion will work on a PC.

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