What is dvd video format

what is dvd video format

DVD formats

Jul 26,  · Common DVD Player Format MPEG-2 format is used in most standard DVDs. MPEG-2 is also called H or H It is a compression type that . Mar 26,  · DVD stands for "digital video disc" or "digital versatile disc". There are many different recordable formats of DVD, including DVD-R, DVD-RW, DVD+R, DVD+RW, DVD-RAM and so on. To help you figure out what these DVD formats are, we will introduce each one of these formats in details.

Dear Lifehacker, I know a lot of video players like PotPlayer can play any video file out there, but what is dvd video format are there so many video formats in foramt first place?

When I rip a DVD, or go hunting for how to program viewsat ultra lite, which format is the best to use? Dear Confused, The world of video formats can be pretty confusing, but there are only a few things you really need to know. First, it's important to note that a video format vireo more than just its file extension.

Extensions like AVI are not, in fact, video codecs—they're containers. Here's what you need to know about how it all works. Most ehat the video you'll come across is compressed, meaning its been altered to take up less space on your computer. For example, a regular Blu-Ray disc usually takes up around 30 or 50GB of space—which is a lot for a normal person to download or store on their hard drive.

So, we usually compress movies to make them more manageable, usually with some loss in video quality. A codec compresses and decompresses data. It interprets the video file and determines how to play it on your screen.

Your computer comes with many codecs pre-installed, though you can install codec packs for wider supportor a program like VLC or PotPlayer which have lots of codec support built-in which we prefer.

There are a lot of different codecs out there, and it can get really confusing with all the different versions of MPEG standards. These days, you really only need to concern yourself with a few—which we'll talk about in a moment. A container is, essentially, a bundle of files. Usually a container consists of a video codec and an audio codec, though it can also contain things like subtitles. Containers formt you to choose one codec for your video and one for your audio, which is nice—that way, you can choose to use the high-quality DTS audio, or compress your audio to something like MP3 for even more space savings.

It just gives you a bit more control over how you record your videos or rip your movies. Popular containers include:. The main difference between different containers is not only the codecs what is a good cpu cooler support but what other features they support—like subtitles or chapters.

These days, MKV is an extremely popular container, mainly because it supports nearly any ie codec under the sun, as well as a ton of extra features plus it's open source. These days, you'll only really come across a few different codecs and containers as you browse the web for video. Handbrake, our favorite DVD ripper and video encodersupports three video codecs which you can see under the "Video" tab and two what is dvd video format which you'll find under "Output Settings".

The one downside of MKV is that it isn't as well supported by certain programs and devices. So, if you're putting these videos on your iPad, Apple TV, or Xboxfor example, you'll want to go with the more widely supported MP4.

That's a lot of information to throw at you in a few paragraphs, but like we said—despite how big and confusing the world fideo video is, a lot of those codecs are outdated, and the vast majority of the time, you'll just be choosing between MKV and MP4. The A. Video Lifehacker Originals. Whitson Gordon. Share This Story.

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Jun 05,  · DVD-VCD is a DVD-Video disc that has data on it that has been encoded by using the MPEG-1 video format with the same definitions VCD has. DVD-SVCD is also not a valid DVD standard, since the DVD standard does not support the SVCD resolution. Dec 29,  · Common DVD player format The most standard DVD formats is MPEG-2 format, which is also called H or H It is the compression type with quite clean video and audio reproduction and playback, and widely used around the world. Also, the audio format is called A/ World Video Formats. The NTSC Standard (National Television System Committee) is used by many countries on the American continent as well as many Asian countries including Japan.. The PAL standard (Phase Alternating Line) was implemented in most European countries except for France.. The SECAM standard (Sequential Couleur Avec Memoire or Sequential Colour with Memory) was implemented in .

Commercial DVD movies are encoded using a combination MPEG-2 compressed video and audio of varying formats often multi-channel formats as described below. DVD-Video was first available in Japan on November 1, with major releases beginning December 20, , [4] followed by a release on March 24, in the United States—to line up with the 69th Academy Awards that same day. Certain information in the DVD Book is proprietary and confidential. The following formats are allowed for H.

Video with frame aspect ratio is supported in all video modes. Widescreen video is supported only in D-1 resolutions. The H.

Content with a frame rate different from one of the rates shown above can be encoded to H. This is most commonly used to encode Pulldown can be implemented directly while the disc is mastered, by actually encoding the data on the disc at Alternatively, the content can be encoded on the disc itself at one of several alternative frame rates, and use flags that identify scanning type, field order and field repeating pattern.

Such flags can be added in video stream by the H. A DVD player uses these flags to convert progressive content into interlaced video in real time during playback, producing a signal suitable for interlaced TV sets. These flags also allow reproducing progressive content at their original, non-interlaced format when used with compatible DVD players and progressive-scan television sets.

A similar standard exists in countries using the NTSC system, though with no requirement mandating the use of or support for the MP2 format.

DTS audio is optional for all players, as DTS was not part of the initial draft standard and was added later; thus, many early players are unable to play DTS audio tracks. The official allowed formats for the audio tracks on a DVD-Video are:. DVDs can contain more than one channel of audio to go together with the video content, supporting a maximum of eight simultaneous audio tracks per video. This is most commonly used for different audio formats—DTS 5. DVD-Video discs have a raw bitrate of Of this, up to 3.

Encoding at less than the max bitrate like this is typically done to allow greater compatibility among players, [16] and to help prevent buffer underruns in the case of dirty or scratched discs.

Multiple languages, angles, and extra audio tracks were eliminated to free up more space for the main title and thereby to ensure the highest data rate possible. In January the Superbit line was discontinued.

Standard DVD-Video files contain extra information such as the number of video tracks, chapters and links to extra features that DVD players use to navigate the disc. IFO files store control and playback information—e. They do not store any video or audio data or subtitles. Data structures recorded on a DVD-compliant disc are components of one of the four data groups called domains: [25] [26] [27] [28]. VOB is based on the MPEG program stream format, but with additional limitations and specifications in the private streams.

DVD-Video may also include up to 32 subtitle or subpicture tracks. Subtitles are usually intended as a visual help for the deaf and hearing impaired and for translating dialogs. Subtitles can serve other purposes as well. For example, in the DVD release of Thirteen Days one of the subtitle tracks includes history notes, giving additional information timed to the events depicted in the film.

Shaun of the Dead also features trivia facts about the making of the film on its subtitles menu. Subtitles are stored as bitmap images and therefore can contain messages in any language.

Subtitles are restricted to four colors, including transparent "color", and thus tend to look cruder than permanent subtitles on film. DVD-Video may also contain closed captioning material which can only be viewed on a television set with a decoder. DVD-Video may contain chapters for easy navigation, and continuation of a partially watched film. If space permits, it is also possible to include several versions of certain scenes, called "angles.

For example, it can be used to supply different language versions of images containing written text when subtitles would not do e. Multiple angles have found a niche in markets such as yoga , erotica and live performances.

A significant selling point of DVD-Video is that the storage capacity allows for a wide variety of extra, or bonus, features in addition to the feature film.

These extra features can include audio commentary ; documentary features, commonly about the making of the main title; interviews ; deleted footage ; outtakes ; photo galleries; storyboards ; isolated music scores ; trivia text commentary; simple games; film shorts ; TV spots ; radio spots ; theatrical trailers which were used to promote the main title; and teaser trailers advertising related movies or DVDs.

Extra features often provide entertainment or add depth and understanding to the film. Games, bloopers , and galleries provide entertainment. Deleted scenes and alternative endings allow the audience to view additional content which was not included in a theatrical release.

Directors cuts allow the audience to see how the director envisioned the main title without the constraints which are placed on a theatrical release. Extra features require additional storage space, which often means encoding the main title with lower than possible data rate to fit both the main title and the extras on one disc. Lower data rate may decrease visual and sound quality, which manifests itself in various compression artifacts.

To maintain quality the main title and the extras may be released on several discs, or the extras may be omitted completely like in the " Superbit " line of DVDs. There are also anti-ripping techniques intended to foil ripping software. CSS does not make it difficult any more to copy the digital content now that a decoder DeCSS has been released, nor is it possible to distinguish between legal and illegal copies of a work, but CSS does restrict the playback software that may be used.

CSS has caused major problems for the inclusion of DVD players in any open source operating systems, since open source player implementations are not officially given access to the decryption keys or license to the patents involved in CSS. Proprietary software players were also difficult to find on some platforms. However, a successful effort has been made to write a decoder by reverse engineering , resulting in DeCSS. This has led to long-running legal battles and the arrest of some of those involved in creating or distributing the DeCSS code, [37] [38] through the use of the controversial U.

Digital Millennium Copyright Act DMCA , on the grounds that such software could also be used to facilitate unauthorized copying of the data on the discs. The Videolan team, however, went on to make the libdvdcss library. Unlike DeCSS, libdvdcss can access a CSS-encrypted DVD without the need of a cracked key, thus enabling playback of such discs on opensource players without legal restraints although DVD rippers using this library may still be subject to restrictions.

In some countries it is not illegal to use de-scrambling software to bypass the DVD restrictions. A number of software programs have since appeared on the Web to view DVDs on a number of different platforms. Other measures such as anti-ripping, as well as U. After DeCSS ripping software became available, companies developed techniques to introduce errors in DVD-Video discs that do not normally affect playback and navigation of a disc, but can cause problems in software that attempts to copy the entire disc.

All of these methods have been circumvented as might have been expected, since all standard DVD players naturally circumvent them to play and navigate the discs normally. Riplock is a feature that reduces drive noise during playback but inadvertently reduces ripping speed.

DVD-Video allows the disc to specify whether or not the user may perform any operation, such as selecting a menu, skipping chapters, forwarding or rewinding — essentially any function on the remote control. Most DVD players respect these commands e. However, grey market players ignore UOPs and some DVD "re-authoring" software packages allow the user to produce a copy without these restrictions.

The legality of these activities varies by jurisdiction and is the subject of debate. See fair use. Each DVD-Video disc contains one or more region codes, denoting the area s of the world in which distribution and playback are intended.

The commercial DVD player specification dictates that a player must only play discs that contain its region code. In theory, this allows the motion picture studios to control the various aspects of a release including content, date and price on a region-by-region basis, or ensure the success of "staggered" or delayed cinema releases from country to country. Regional coding kept the European DVD unplayable for most North American consumers, thereby ensuring that ticket sales would be relatively unaffected.

In practice, many DVD players allow playback of any disc, or can be modified to do so. Entirely independent of encryption, region coding pertains to regional lockout , which originated in the video game industry. From a worldwide perspective regional coding may be seen as a failure. This, coupled with the fact that almost all televisions in Europe and Australasia are capable of displaying NTSC video at the very least, in black and white , means that consumers in these regions have a huge choice of discs.

Contrary to popular belief, this practice is not illegal and in some countries that strongly support free trade it is encouraged. A normal DVD player can only play region-coded discs designated for the player's own particular region. However, a code-free or region-free DVD player is capable of playing DVDs from any of the six regions around the world.

While the same license prohibits manufacturers from including prominent interfaces to change the region setting it does not clearly prevent them from including "hidden" menus that enable the player's region to be changed; as such, many high-end models in the U. Conversely in the UK and Ireland many cheap DVD players are multi-region while more expensive systems, including the majority of home cinema systems, are preset to play only region 2 discs.

By forgoing Dolby standards, manufacturers cut costs considerably; encoding in lower bit-rates also allows a TV series to be squeezed onto fewer discs.

There is no region coding in such cases. There are also two additional region codes, region 7, which is reserved, and region 8, which is used exclusively for passenger transport such as airlines and cruise ships. This is used to control playback and display special effects on the menus.

As a result of a moderately flexible programming interface, DVD players can be used to play games, such as the DVD re-release of Dragon's Lair , along with more sophisticated and advanced games such as Scene It? This is used to enforce the publisher's restrictions on what regions of the world the DVD can be played. See Regional lockout and DVD region codes. While open-source software DVD players allow everything, commercial ones both standalone models and software players come further encumbered with restrictions forbidding the viewer from skipping or in some cases fast-forwarding certain content such as copyright warnings or advertisements.

See User operation prohibition. At the time of their launch, consumer awareness of either high-definition format was severely limited, with the end result that most consumers avoided both formats, already content with DVD. However, sales figures suggest that DVD is in no immediate danger of disappearing.

Moreover, some labels are cutting back on Blu-ray Disc releases in favor of DVD-Video, claiming that low sales do not justify the more expensive Blu-ray Disc format. Ultra HD Blu-ray is the latest version available, supporting 4K resolution content. From Wikipedia, the free encyclopedia. Main article: VOB. Main article: Content Scramble System.

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