Demolandia Demo Trailers for Testing Home Theater Surround Systems


Demolandia is, essentially, an audiovisual library where you will find a great diversity of images, audio and video files related to the cinema, as well as trailers of the latest films and interesting information for technology lovers. Since 2010 our priority has been to make the necessary tools available for our users to verify their audiovisual devices, whatever the range is.

However, what do we mean exactly?

Each audio device we acquire comes with specifications and certifications that guarantee a certain quality and fidelity level in the sound that will come out of them. At Demolandia we are responsible for collecting a library with the most useful and important demonstration files, trailers and tests that have been appearing along with those equipment, codified to the best quality and with less loss to guarantee the greater fidelity in the sound, thus ensuring an accurate evaluation of the performance of your speakers, amplifiers, headphones or any other audio device.

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On the other hand, the monitors and TVs are constantly offering a clearer and more real image. That is why, at Demolandia, you will also find the widest variety of trailers that, besides bringing us back memories of past times in the case of the most classic ones, will give you a clear idea of the potential of any television and audio system. We even have 3D demos of the best quality.

In conclusion, who are we?

At Demolandia we are enthusiasts of technology, lovers of high quality and fidelity, that we have decided to facilitate to our users the use of the maximum potential of their audiovisual devices and provide them with such an amazing vision of the history and evolution of these technologies. Therefore, if you are one of those who checks each label (Dolby, THX, DTS) in the equipment boxes, movies, DVD, Blu-Rays or video games you acquire, you have come to the right place.

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  4K Video Test33
  3D Trailers55
  Speaker Test40
  Screen Test121
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Featured Movie Trailer HD

You can see more videos on the 4K Movie Trailers section.
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Home Theater Trailers Resolutions:

4K Video Test

SD: (480p, 576p):

For SD Dolby intros, the most usually format is the MPEG-2 format a resolution of 720×480 pixels (NTSC) and 720×576 (PAL), using an average bit rate of about 5 MBps (variable bitrate mode, which distributes the bits available according to the complexity of each frame). The maximum allowable rate is 9.8 MBit/s, which is rarely used for practical reasons. The common container for SD trailers is vob. Most commercial DVD publishers often use maximum values of 7.8 to 8.5 MBps, is possible to use a special mode called “16:9 anamorphic” that encoding a panoramic film using all the available resolution; in fact the vast majority of widescreen movies on DVD are encoded in this resolution, without recording the black bars as if it was part of the image. Just needed the black bar is added to fill the image to a 16:9 (if movies with an aspect ratio greater than 16: 9, such as 21: 9 format that usually abound in today's cinema).

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HD ready (720p):

HD ready 720p is the short name for a HD video mode, mainly used in high-definition television (HD TV). The number 720 represents 720 horizontal display resolution lines, while the letter p means progressive scan. The common format for is m2ts and mkv. The resolution for this HD format is 1280×720.

Full HD (1080p):


It is an emerging UHD standard for digital film resolutions and computer graphics. The name derives from the horizontal resolution, which is approximately 2,000 pixels. 2K represents the horizontal resolution because there are numerous aspect ratios used in films. The vertical depends on the aspect ratio with which the director decides to work. The resolution of UHD demos is 2,048 × 1.0803 (17: 9) and 2.2 megapixels. There are some utilities to test the correct UHD 2K and full 4K calibration in our section.


The UHD 4K name derives from the horizontal resolution, which is about 4,000 pixels. UHDV 4K (2160p) used in the digital television. There are different resolutions for the that qualify as UHD 4K:

4096 × 2160 (17:9)2 (8,8 megapíxeles) – Full UHD 4K
3840 x 2160 (16:9) (8,3 megapíxeles) (4K UHDV)

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In the section you will find demo trailers with the following audio formats:

DTS Demo Trailers (Digital Theater System):

Surround Sound Test have digital audio encoding surround system that allows 6 independent surround audio channels into a single DTS compressed signal. Apart from being used for DTS trailers, DTS also used in films and “special places” such as theme parks or virtual simulators, in which case can hold up to 8 independent DTS surround channels into a single signal, and can synchronize multiple signals to get a fully independent unlimited number of channels.

THX Demo Trailers:

THX is a high-fidelity audio and video standard for THX movie theaters and home theaters compatible systems. THX certified was created in 2002 developed by Tomlinson Holman at THX George Lucas company. In 1983, to assure that the soundtrack for the third Star Wars film, Return of Jedi would be accurately reproduced in the best places.

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THX is not a recording technology format for the : All sound are encoded in digital formats like Dolby Digital, SDDS, DTS or analog like Dolby Stereo or Stereo Ultra can be shown in THX. It is primarily a quality assurance. You can find a lot of vob, m2ts and mkv demos on Demolandia for testing it. THX certified theaters provides high-quality, predictable video and sound environment to ensure that any soundtrack reproductions such as those in our section mixed in THX system will sound as near as possible to THX sound engineer intentions.

THX provides certified theaters with a special crossover circuit. THX certification of the auditoriums includes specific acoustic and other technical requirements like floating floor, acoustically treated walls, walls without parallel walls (to reduce standing waves), a perforated screen (to ensure continuity in the center channel) and NC30 rating of background noise (avoid the noise provided by air conditioners units and projection systems). THX Ultra, THX Ultra2, THX Select, THX Select2 are the different quality THX certifies.

Dolby Demo Trailers:

Some are Dolby Digital and also DTS. For the sound part of a movie to fit on a file, the part corresponding to the sound data, such as MP3, is compressed (by mathematical techniques). For its part, DTS uses to encode sound larger data and, therefore, the sound quality is a little better, it is cleaner. The differences between Dolby TrueHD and DTS-HD are, however, barely audible. The technique was introduced in 2012 and allows a maximum of 128 audio tracks. So far there is only Atmos sound in a few movie theaters.

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3D Video Types:

3D Demo Trailers

3D Anaglyph Demos:

3D Anaglyph were for decades the most popular 3D passive glasses. The anaglyph 3D glasses use color filters (red-blue, red-green or amber-blue), which allow to display different images to each eye, giving an 3D effect of relatively convincing depth.

3D SBS Trailers (Side by Side):

Today are mainly used in 3D cinemas the passive Polarized glasses. These 3D glasses filter light waves coming from different 3D screen corners, allowing each eye receives only the polarized image that corresponds. These 3D system has been more popular than anaglyph because they do not use color filters that could distort the original image color. The uploaded in 3D section for polarized glasses are known as 3D SBS (Side by Side).

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3D Active glasses:

3D Active glasses uses LCD (liquid crystal technology). It has infrared (IR) sensor that allow to connect it wirelessly with the 3D TV. In this 3D system, the two images are not displayed while it is turned on and off at high speed. The liquid crystal 3D glasses alternate between a “transparent” mode and “opaque” mode while the images are alternated on the 3D screen, for example, the left eye is blocked when the right eye image appears on the 3D TV and vice versa. This happens so fast that our mind can not detect the flicker in the 3D TV.

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Intros formats:

Video Formats

VOB Trailers:

DVD-Video Object o Versioned Object (vob) Base is a file type contained in the DVD-Video. Includes menus, video, subtitles and audio in stream format. The VOB intros are encoded normally by following the MPEG-2 standard. If we change the extension .vob to .mpg or .mpeg, the file is readable and continues to have all the information, although some players do not support subtitle tracks. To burn the VOB files onto a DVD ± R, are needed in addition other DVD-Video files, such as IFO and BUP.

M2TS Intros:

MPEG-2 Transport Stream (m2ts) is a container file format extension used for the HD Blu-ray Disc audio and video (BDAV). It is used for multiplexing video, audio and other streams. This format is commonly used for the high definition intros and video Blu-ray Disc and AVCHD.

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Matroska Demos (MKV):

It is an open standard container, a file that can contain an unlimited number of pictures HD videos, subtitles or audio tracks inside a single file. Its purpose is to serve as a universal format for storing audiovisual and multimedia content, like HD movies or TV shows, video games, images and texts. MKV is the mots common format for our new section. It is not a video codec like H.264 / MPEG-4 AVC or vorbis for the trailers, it is a container that contains audio, video and subtitles inside the same package, which allows you to play the demos on computers and other devices.

QuickTime Format:

The QuickTime format with mov extension is the most common format for the Movie Trailers section. You need a video player compatible for view the latest film trailers.

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