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Downloading Movie Trailers for Play on TV

Old 10-21-08, 02:08 PM
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Downloading Movie Trailers for Play on TV

Folks,
I want to download movie trailers in 5.1 surround for play in my home theater before movies. Call me a nerd, but I like to be able to preview movies that haven't premiered in theaters yet before our movies. I have the Sony BDSP300 BluRay player and a Samsung 1080p LCD screen. I only have a DVD Burner, not a Blu Ray burner, so I suppose I am limited as far as HiDef content and TrueHD surround sound. But I would still be interested in 5.1 movie trailers as they still sound great on the system. Any suggestions? Are the trailers on ITunes in 5.1? Thanks in advance! I had one other question unrelated to this, but are the soundtracks that are distributed to movie theaters naturally lossless, like DolbyTrueHD or DTS Master Audio, or do they employ some type of compression. I understand that Dolby Digital soundtracks in the days of DVD had to be compressed due to limited space on the DVD, but were they just compressed versions of what was played in theaters? To break it down, if I am watching a film in True HD at home on my Blu Ray, is it the exact same soundtrack that would've accompanied the film in theaters during its run? Sorry for the 2 in 1 post folks!
Old 10-21-08, 09:32 PM
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Originally Posted by mrconceited View Post
Folks,
I want to download movie trailers in 5.1 surround for play in my home theater before movies. Call me a nerd, but I like to be able to preview movies that haven't premiered in theaters yet before our movies. I have the Sony BDSP300 BluRay player and a Samsung 1080p LCD screen. I only have a DVD Burner, not a Blu Ray burner, so I suppose I am limited as far as HiDef content and TrueHD surround sound.
BD material can be put on a DVD. It's called BD5/BD9 (depending on whether it's a single or dual layer DVD), and it's part of the official Blu-Ray spec:
http://en.wikipedia.org/wiki/Blu-ray...5_Blu-ray_Disc

Aside from BD, there's also the AVCHD and AVCREC standards that allow for HD content on a DVD. The BDP S300 can play AVCHD discs:
http://en.wikipedia.org/wiki/AVCHD#C...y_Disc_players

As for the conversion needed to change a downloaded trailer into a format viewable on your player, you'll have to look up guides to that on your own.


I had one other question unrelated to this, but are the soundtracks that are distributed to movie theaters naturally lossless, like DolbyTrueHD or DTS Master Audio, or do they employ some type of compression?
The DTS used in theaters is 15 years old, and is lossy compressed.
http://en.wikipedia.org/wiki/Digital_Theater_System

Dolby Digital is 16 years old, and is a lossy compressed format.
http://en.wikipedia.org/wiki/Dolby_D..._Dolby_Digital

SDDS is a 15 years old theatrical digital sound format, and is lossy compressed.
http://en.wikipedia.org/wiki/SDDS

DolbyTrueHD and DTS-HD Master Audio are losslessly compressed, meaning they have a lower ABR than an uncompressed PCM track, but don't lose any audio information, and thus are of the same quality.

So the PCM, TrueHD, and DTS-HD MA tracks on a BD are of better digital quality than the tracks played in theaters. Whether they actually sound better though depends largely on your audio equipment.

I understand that Dolby Digital soundtracks in the days of DVD had to be compressed due to limited space on the DVD, but were they just compressed versions of what was played in theaters? To break it down, if I am watching a film in True HD at home on my Blu Ray, is it the exact same soundtrack that would've accompanied the film in theaters during its run? Sorry for the 2 in 1 post folks![/QUOTE]
Old 10-21-08, 11:03 PM
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How would I go about burning Hi Def content onto a regular DVD? I.E., if I download a 1080 trailer in .mov format, what format would I have to change it to to burn to a DVD, and what program will let me burn the full resolution onto a DVD without compression? Also, all of the trailers I have downloaded are in plain ol' stereo. Do you guys know of a site with full 5.1 trailers available for download?

Based on Jay G's reply:


Forgive me for sounding like a newbie, but based on what you are saying, most commercial movie theaters these days employ a lossy soundtrack presentation, thus theoretically making these soundtracks on BluRay of much higher quality? Are there modern theaters that present the movie in a lossless format?
Old 10-22-08, 08:00 AM
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Originally Posted by mrconceited View Post
How would I go about burning Hi Def content onto a regular DVD? I.E., if I download a 1080 trailer in .mov format, what format would I have to change it to to burn to a DVD, and what program will let me burn the full resolution onto a DVD without compression?
First, all HD content is compressed, especially video downloaded from the internet. You may have meant downconversion, which is the term used to refer to converting HD content to SD.

You'll need a BD or AVCHD disc authoring program in order to create a compatible disc with HD content. Nero 9 and Roxio Creator 2009 can create such discs:

http://www.nero.com/enu/technologies-blu-ray.html
http://www.sonic.com/products/consumer/default.aspx

Note that, depending on what format the trailer is downloaded in, you may need to convert the file to a different format before the authoring programs will accept them as input.

Forgive me for sounding like a newbie, but based on what you are saying, most commercial movie theaters these days employ a lossy soundtrack presentation, thus theoretically making these soundtracks on BluRay of much higher quality?
Apparently so. DD and SDDS are encoded straight onto the film, so there's no way for those codecs to be improved without making all existing theatrical decoding equipment obsolete. There's also no room left on the film itself for a new codec.

DTS seems to have the potential for easier upgrading, since only a timecode is printed on the film for syncing, while the sound is stored and played back separately on discs. A new DTS playback system could be developed that used better audio, but utilized the same timecode. However, that doesn't appear to have occurred.

Are there modern theaters that present the movie in a lossless format?
IMAX uses 6-channel uncompressed audio for their sound:
http://en.wikipedia.org/wiki/IMAX#Technical_aspects

I couldn't find any info on what sound systems digital projection setups typically use.

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