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What is the best video and movie quality? Part 5

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What is the best video and movie quality? Part 5

What is the best video format?

There are many different video file formats that allow you to store compressed video and audio information in a single file. Many people used to call the extension of the video file itself a video format, but in reality this extension is just a container in which videos of various formats can be stored. Some users may have faced such a situation that the downloaded video file with the familiar and familiar AVI extension did not want to be played on the computer, because a suitable codec was not found for playing.

Most of the video files distributed on the Internet are now created using the two most common containers, AVI and MKV. AVI container has been used for a long time and many different programs have been written to edit such video files, but with MKV things were quite different for a long time and users did not know how to cut an mkv file.

To play or create each video format, an appropriate codec must be installed on your computer. The most popular codecs can be counted on one hand, and we will consider some of their features below.

The XviD codec of the MPEG4 standard provides high definition images for dynamic scenes. It is distributed completely free of charge and is widely used by amateur video masters to encode any video.

DivX is still one of the most popular codecs and is compatible with all DVD players. By encoding, you get high-quality video with a high level of data compression, allowing you to get small video files. At the moment, the DivX codec is paid when used for encoding.

The H.264 codec has become very popular in recent years due to its higher compression efficiency. When encoding, a very high degree of image compression is obtained with no loss of quality. It has proven itself very well when it comes to encoding HD quality videos.

The MPEG2 codec is used to create DVD video discs and digital television.

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What is the best video and movie quality? Part 4

What is the best video and movie quality? Part 4

Best quality video formats. Video resolution:
Mobile is a video created for mobile devices; Typically, the resolution is between 320 × 240 and 640 × 480 pixels.

Standard Definition (SD): video standard

What is the best video format?

It is no secret that recently there have been very popular sites that distribute free files of movies, music, books, programs and much more. But how not to get confused with all the variety of distributions offered? What video format should you choose? Let’s deal with this. So:

What is the best video format?
One of the most common and good video formats is the avi format. It is small in size and does not lose much in image quality. But there is also an alternative to this format, which combines both an acceptable size and a high image resolution. These are files in mkv format.

And finally, I would like to point out that the highest video quality you can see on a computer is BluRay video. Versions of such files are generally scanned from BD discs. This format is so realistic and deep that it competes with analog tape in the cinema.

Surely, many have heard a term like “codecs”. This is a program that converts diverse information into digital. The essence of the program is that the codecs form a conditional folder for storing data, thanks to this process, the information becomes more convenient for storage. At the same time, the folder structure does not change, only the data transfer method changes.

Today, the most common codecs for saving videos are:

If you want to create your own video or movie presentation, you must decide which video codec to use. Let’s take a closer look at each of them.

XviD. A codec that supports the popular MPEG4 standard. If your movie’s plot contains a lot of movement, choose this particular codec. Dynamic scenes will be clear.

DivX. This codec is perhaps the most popular. If you convert folders with this codec, the video quality will be of the highest definition. Also, the video can be played on any DVD player due to the small size of the saved files.
H.264. This codec will require a separate installation on your computer. But it is difficult to dispute the effectiveness of his work. The quality is still excellent despite the higher compression ratio of the folders.
MPEG4. The most popular video standard. It is widely used in digital television. The standard allows high-speed transmission of any amount of information. This codec is also used to record DVD discs.
These are the characteristics of different types of codecs. Now you must decide what you want to create. For example, let’s say you decided to create a video presentation. To understand which video format to choose in this case, you need to answer the question: where will you broadcast your presentation? If you are going to publish the created video on some special video portal, then a codec like H.264 will suffice, because it allows you to maintain high quality, while significantly compressing the data.

What is the best video and movie quality? Part 3

What is the best video and movie quality? Part 3

To encode video, the best video formats MPEG-2, MPEG-4, H.264 or AVC (video compression standards (codecs) designed to achieve a high degree of video compression while maintaining high quality are currently used ).

Transmission of the HDTV video signal over a short distance (from the user’s tuner (receiver) to the monitor (TV)) is carried out in its original form (uncompressed) via HDMI and DVI-D digital cables. The use of digital interfaces (cables) completely avoids video compression and conversion and preserves the best possible image.

Digital video quality is a measure of signal-to-noise ratio. What is the best video and movie quality, and which can be downloaded from the Internet? Well, first of all, it must be said that the main requirement of Internet formats is compactness. It is clear that the DVD or HDTV format will not work. But almost any video recorded with a mobile phone or digital camera meets the requirements of the Internet. And the question arises, what is the most optimal and best video quality with maximum compression for the convenience of downloading from the Internet, and what are the designations of movie formats?

Better quality HDTV movies are confused by many Internet users with the HDTV-Rip video extraction method. HDTV-Rip is a video copy of a high definition video (movies) streaming source: HDTV. This can be done using a variety of codecs and compression methods. As a result, HDTV-Rip movies may not be of the highest HD quality. Rip video streams from an HDTV channel may come with the channel logo. Also, do not confuse HD video with HDTV high definition video.

What is the best video and movie quality? Part 2

What is the best video and movie quality? Part 2

What is the difference between 1080i and 1080p?

Each of these video formats uses a different way to convert a series of still images into movies. In interlaced scanning (“i” symbol), a still image or “frame” is reproduced by scanning 2 sets of alternating lines or “fields” (half frames). With progressive scan (“p” symbol), a frame is created in a single pass (sweep). That is, if the image scanning in both video formats (“i” and “p”) is performed at the same speed, then an equal number of runs per second occurs, then the advantage of progressive scan (“p”) becomes obvious (image quality is better) as the entire image (frame) is scanned and not half of the image (field). This progressive (“p”) scan generates fewer dots and lines, but doubles the speed.

Bottom line: 1080i and 1080p video formats look best in different conditions. The 1080i video format is designed to reproduce fine image details with little movement or in frames and still images. This video format is much better suited for “spatial resolution”. The 1080i video format works fine as long as there is no frame movement. When objects begin to move, the path of movement between alternating fields (half frames) begins to change. This is called “motion artifacts,” that is, visible image noise or video distortion that resembles an uneven pattern. 1080i video quality is considered outdated.

1080p video quality takes priority in motion. It does not introduce visible distortions in the image, regardless of the speed of moving objects, so it has the best “temporal resolution”. However, still images will not look very clear when the image is frozen, because there are far fewer dots and lines in 1080p video compared to 1080i.

Long-distance transmission of HDTV video signal (satellite TV – S2, cable TV) is generally done using compression methods to reduce bandwidth requirements for data transmission (from 1.485 Gbps to 8-25 Mbps ), while the video quality is still good.

What is the best video and movie quality?

What is the best video and movie quality?

What video formats are there?

Video (video – watch, watch) is the transformation of an image by a recording device into a sequence of electrical signals recorded in storage (storage).

In addition, video is a great variety of technologies for recording, processing, transferring, storing and reproducing visual or audiovisual material (cinema, films, video recordings, music, video, etc.). Video differs from film and cinematography only in that it uses any medium other than film for its reproduction and recording, although the modern development of digital technologies in filming and digital cinema projectors eventually blurs the line between the video, movies and cinema. The video format determines the structure of the video file, how the file will be stored on the storage medium (CD, DVD, Blu-ray Disc, flash memory cards, hard drives or communication channels).

The best highest quality video today is HDTV (High Definition Television in English): high definition television, high definition television. HD is a high definition video format, a modern format with a high definition of the image.

The most popular HD video formats are:
1) 720p – 1280 × 720 pixels (dots), progressive scan (progressive scan, all lines of each frame are displayed sequentially), 16: 9 aspect ratio, frequency – 24, 25, 30, 50 or 60 frames per second ;

2) 1080i – 1920 × 1080 pixels, interlaced (each frame is divided into two half frames, consisting of lines selected with a line separating, 2 times the frame rate compared to progressive), 16: 9 aspect ratio , frequency – 50 or 60 fields per second;

3) 1080p – 1920 × 1080 pixels, progressive scan, aspect ratio 16: 9, frequency – 24, 25 or 30 frames per second.

Types of videos

Types of videos

MPEG-1

The MPEG-1 video compression format was developed by the Motion Picture Expert Group, an international organization that creates video compression standards. It supports a maximum frame resolution of 4095 x 4095 pixels at a frame rate of up to 60 times per second. However, a resolution of 352 x 288 is generally used, which corresponds to the quality of recording on a normal VHS cassette.

How is the information compressed in this format? Suppose we have the following scene: the car moves from point “A” to point “B”. The movement of the machine can be described by two parameters: the vector of movement from point “A” to point “B” and the angle of rotation around its axis. At the same time, the background remains unchanged or almost unchanged: the viewer is unlikely to pay attention to the vibrations of small branches near distant trees. So you can divide the frame into two components: the background, which is saved once and then replaced during all-frame playback, and the area where the car moves, will have to be recorded separately for each frame.

Digital video: an overview of formats

In MPEG-1 format, all frames in a movie are classified into three types: I, P, and B frames. The first type (I-frames, Intra Frames) includes anchor frames. Your images are saved in their entirety in JPEG format. For the predicted frames, only the differences from the previous i-frame are recorded, which requires much less disk space. For B-frames (bidirectionally interpolated frames), the differences with the previous and next I or P-frames are preserved (Fig. 2).

Digital video: an overview of formats

As a result, the compressed file size is approximately 1/35 of the original. This means that an hour and a half movie with the quality equivalent to an analog VHS cassette in MPEG-1 format will fit on two CDs. For transmission over the Internet or in satellite transmission networks, this standard, of course, is not suitable. But there have been many consumer video CD players that work in this format (and they are still being produced now, by the way).

MPEG-2

MPEG-2 is an additional extension of MPEG-1. The recommended frame size has been increased; it is now 1920 x x 1080 pixels, added support for six channel audio. However, playing video in this format requires more processing power from your computer.

It should be noted that work was underway to create the MPEG-3 standard (not to be confused with the now popular audio compression format: MPEG-1 Audio Layer 3). It was supposed to become the basis for HDTV digital television systems. But the work was interrupted, because the necessary requirements for HDTV were implemented in the form of small extensions of MPEG-2.

This format is now quite widespread in the West: it is used to transmit video through satellite channels and digital cable networks, in addition, all DVD video discs are recorded in this format.

MJPEG

In fact, MJPEG (Motion JPEG) is a transition format from compressing normal photos to compressing videos. Each frame is recorded in JPEG format and then placed in the footage. MJPEG is mainly used in video editing cards like Fast AV Master, MiroVideo DC50, etc. You can reduce the video stream from 30MBps to 6MBps. For use in home video players, this standard is not very suitable due to the low compression ratio (5: 1) and the lack of means to synchronize video and sound.

MPEG-4

The MPEG-1 and MPEG-2 formats did not provide a real possibility to transmit video over the Internet and create interactive television based on them: the file size was too large. To drastically reduce it, as well as implement other functions necessary for video transmission, work has begun on the specifications of a new format: MPEG-4. In fact, it does not focus so much on video compression as on the creation of so-called “multimedia content”: the fusion of interactive television, 3D graphics, text, and so on.

As for the video itself, the most important innovation was the further improvement of technologies for decomposing a scene into objects and algorithms for their effective compression. Thus, for example, when compressing a video recording of a tennis match, most of the frames can be conditionally decomposed into images of the stands (background) and the players.

Video compression formats

Video compression formats

Before building a video surveillance system, a technician will have to solve a number of critical problems and tasks. Along with the choice of cameras, servers, and software, it is necessary to select the optimal compression format for the system’s video transmission. The main formats for video surveillance systems are MJPEG, MPEG-4 and H.264 (MPEG-4 part 10). Controversy “Which format is better?” Similar to the disputes “what is the future for: analog or ip?”, have been going on for several years, but experts still cannot reach a consensus. In this article we will talk about the characteristics of the formats, the parameters that must be taken into account when choosing, and the technologies used to analyze video streams.

Compress video

The videos from the IP surveillance cameras reach the server in compressed form. Compression generally involves removing features that are almost invisible to the human eye, although compression is sometimes done without loss of information. Compressed video stream requires less network bandwidth and less free hard disk space. To view or analyze the video, the resulting stream must be unzipped; apply the reverse conversion algorithm to compression. The combination of compression and decompression algorithms is called a video codec. Video codecs of different standards are not compatible with each other; video information compressed with one codec, as a rule, cannot be decompressed with another.

There are several types of compression.

Lossless compression allows you to obtain an image after decoding that does not differ from the original frame.
Lossy compression loses information after decoding.

Several lossy compression implementations are possible:

lossy percentage compression – loss is so insignificant to the human eye that the frame before and after decoding is virtually indistinguishable to the operator;
lossy compression – the differences between the frames before and after decoding are noticeable, but still not very pronounced, all the information necessary to analyze the events is saved;
Lossy Compression: Low-quality streaming video compression, causing artifacts (noticeable video distortion) during decoding. The appearance of artifacts leads to a decrease in image clarity, the appearance of fields of the same color (when different color tones are combined in one), the appearance of image blockages (pixelation, graininess). The presence of artifacts leads to false results of the analysis of the video stream by the system software.
In the compression process, to reduce the size of the video stream, the amount of color tones in the image are reduced, color resolutions are lowered, and small details in the image that are invisible to the human eye are removed; predict changes based on data already received; remove duplicate pixel values.

Video compression formats

There are many compression formats, MJPEG, MPEG-4 and H.264 are the most popular in video surveillance.

MJPEG format

For the MJPEG compression format, a video sequence is a sequence of still images: JPEG images. Compression occurs individually for each frame (intraframe). We get total independence from individual images. When playing a video file, the image quality is still good: from the MJPEG format you can always get frames with a clear image of the events that take place, it does not require high processor performance, but significantly loads the network and requires a large amount of disk space. This format is characterized by image blocking artifacts, fields of the same color. Camera data is lossy, so it’s impossible to say there is no distortion. Another thing is that if the camera is correctly adjusted, the human eye in JPEG hardly notices distortion.

MPEG-4 and H.264 formats

For MPEG-4 and H.264 formats, compression is performed both within a frame and for a series of frames (between frames). H.264 video (MPEG-4 optimized or MPEG-4part 10) is not a sequence of individual images, but a chain of related data – video streaming. The advantages of this format are that not all frames are saved, but only the reference image and its subsequent changes.

When a significant part of the image remains unchanged, the resulting video size is much smaller than for MJPEG. In case the MJPEG format can send a set of images of 200 KB each, the H.264 format will send a reference image of 200 KB and its subsequent changes, which are much smaller.

Video format comparison: MOV, FLV, MP4 and 3GP

Video format comparison: MOV, FLV, MP4 and 3GP

Each video file format has its own unique characteristics, which make it ideal for specific uses. This fact forces the user to have to choose between them more and more frequently. The most important criteria in making this decision is which characteristics of the file types best suit your specific needs. To help you choose the best type of video file, here is a list of the pros and cons of the most popular video formats.

The .mov video format

The MOV video file format was developed by Apple with the aim of bringing clear benefits to users. One of these advantages is the high quality of MOV videos. Cinema purists and filmmakers who want to create long digital movies, in particular, are determined by the quality preservation properties of the MOV format. When working with MOV files, optimal video quality will be maintained throughout the project. Although MOV is closely linked to Apple, the files can also be opened with Quicktime Player on Windows.

A major problem with MOV is the lack of support from the various media player applications. Many users have to download new software before they can play MOV video. Also, the files are very large, which requires more hard disk space. This can slow down old hardware.

Ultimately, .mov was designed for a specific group of users, especially those who value high video quality. Even if these files are generally used less frequently, they are of great value to a small target group.

The word ‘video’ is made up of many letter tiles.
With the right video format, projects can be implemented smoothly.

The .flv video format

The FLV video file format stands for Adobe Flash Videos. It is the most widely used type of video file on the Internet. The reason for the enormous popularity of .flv is that the format works optimally in all major browsers. Therefore, leading video portals like YouTube also use Flash videos by default. Another reason for the frequent use of FLV video files is that it is suitable for various video formats, including commercial ones.

There is also a downside to the FLV format: if a lot of Flash videos are hosted on a website, it can get slower overall. This is especially likely to be felt by visitors with slower Internet access. This is still a major problem at this time. As the Internet becomes more accessible, this concern will lessen in the future.

A man is editing a video on a laptop.
The FLV video format sadly affects the loading times of websites.

The video format .mp4

The MP4 video file format offers high-quality video. Unfortunately, the format is not ideal for a single task. But that doesn’t mean that these files don’t have many advantages as well. In fact, MP4 files are so small that they are ideal for storing in a video asset management system. Even at such a small size, the video quality is amazing. They are also great for sharing videos due to their high browser compatibility.

Therefore, it is quite paradoxical that the MP4 format is used as the standard in most photo and video cameras, as it scares filmmakers so much. The reason for this is that .mp4 files do not edit well. Without the proper properties that allow for proper editing and good editing, the MP4 video format does not meet the requirements of one of the potentially most important user groups.

A hand holding a camera lens in the forest.
MP4 videos retain high quality despite their small file size.

The .3gp video format

The 3GP video format corresponds to the Third Generation Partnership Project and is the associated file extension. It can be opened with many programs, is inexpensive in terms of memory requirements, and optimally protects data. It is ideal for mobile devices that cannot cope with high traffic when streaming video to each other.

Also, the .3gp file type has a dominant position in relation to video transmitted via text messaging services. This will continue despite certain weak points.

A key problem with 3GP relates to compression and the difficulties it presents. Users who care about maintaining video quality will be amazed at the end result of compression. Although this deficit is a necessary evil for the sake of functionality, many users still find it negative.

Get familiar with the big differences between video file types. This will allow you to make the right decisions for a successful implementation of future projects. Once you have a solid understanding of video formats, consider using a digital asset management system to manage your video files.

MAIN VIDEO FORMATS

When watching a movie with pictures or an explanatory video, the idea of the video format usually plays a secondary role or even does not play any role. However, the format does get interesting when it comes to marketing, placement or embedding of the video across the various channels.

So get familiar with the top nine video formats from our article and become a video format expert in no time.

Container and Codec.

Before dealing intensively with individual video formats, two basic terms should first be clarified:

Video formats are so-called file containers that adapt to different content. In addition to audio and video files, menu structures or subtitles can also be integrated into a container. When the movie plays, the elements of the container are decoded.

Files are compressed within the container using codecs, which affects the quality and size of the file. If a video is played, the files contained in the container are decompressed again using the corresponding codec.

Understanding the functions of containers and codecs is critical to understanding the following nine video formats.

MPEG-1 (.mpg / .mpeg).

MPEG stands for Motion Picture Expert Group, a group of experts who dealt with the subject of video compression as early as the 1980s. MPEG is both a container and a codec. MPEG-1 is the Video CD standard and is therefore out of date. The high storage requirements and the fact that HD (high definition) is not supported mean that MPEG-1 cannot compete with the newer video formats.

Advantages: high distribution, wide acceptance of devices.
Cons: Very outdated, poor video quality (not suitable for HD).

MPEG-2 (.mpg / .mpeg / .vob / .m2p / .ts).
MPEG-2 is the further development of MPEG-1 and is the basis for DVDs. The codec for the MPEG-2 format is called H.262. The file extension on DVDs is .vob, while the MPEG format for camera recordings is usually a .ts file.

Advantages: wide distribution, DVD standard.
Disadvantages: low compression, large file size.

MPEG-4 (.mp4).

The successor to MPEG-2 is the MPEG-4 format. Mp4 files are designed for high HD image quality with low storage capacity. The most common codec is the H.264 standard. In rare cases, DivX and Xvid codecs are used. MPEG-4 is widely used on HD TV and Blu-Ray. At Apple, .mp4 files can generally be found under the abbreviation .m4v. Videos posted on the Internet are usually in .mp4 format.

Advantages: standard on the web, high compression, high quality, flexible use.
Disadvantage: intensive computing power for encoding and decoding.

QuickTime (.mov).
QuickTime is a standard developed by Apple. The QuickTime architecture is the basis for various video editing programs such as Adobe Premiere or Final Cut (Apple’s editing program). MOV files are mainly used for editing and less for actual use. Apart from QuickTime Player, the format is compatible with some multimedia player programs.

Advantage: Standard for professional video editing.
Disadvantage: low acceptance by end devices.

AVI (.avi).
Audio Video Interleave (AVI) files were Microsoft’s answer to Apple’s QuickTime architecture. In the early years of the format, good image quality cost high storage capacities, which could be improved a bit with new codecs like DivX. AVI is accepted and reproduced by a large number of end devices, but it turns out to be bulky with many technical details. Direct transmission is not possible, menus and chapters are not supported, and there is no automatic way to save the correct aspect ratio.

Advantages: widespread use, wide acceptance.
Disadvantages: inflexible, bulky.

WMV / ASF (.wmf / .asf).
ASF is the successor to the AVI format. However, it is known as the WMV (Windows Media Video) codec. The Microsoft codec is similar to MPEG-4, but it is less common. Unlike the previous AVI, the transmission is possible without problems.

Advantages: High compression, good video quality.
Disadvantage: less common.

MKV (.mkv).
Matroska is a container format with the file extension .mkv. Its namesake is the Russian matryoshka dolls, which can be stacked on each other to save space and look cool. This same principle is the goal of the container. The video format allows for different codecs and additional information. Depending on the device, this flexibility can also be a problem during playback.

Video Formats A to Z – Everything You Need to Know About It

Codecs are not only available for video, but also for audio and images. For example, when the software needs to create a video file, it uses a codec for video and audio and creates a video file from it.

What are codecs?

Codecs, as their name suggests, encode (German = “encrypt” or “translate”) and decode (“decrypt”) information. The English word codec means a system of rules or agreements. Its origin is found in the English words En code (encoding) and De code (decoding). The codec “translates” a video from one format, which can be the original or an already encoded format, to other video formats and vice versa.

The task of the codec is to “know” how the data is compressed and how it can be restored (= replayed). Playback software and programs, for example Windows Media Player or the free-to-use, portable VCL player, benefit from codecs.

Often times, it can automatically recognize the codec in a file and find the correct codec to play it back. Or put another way: as long as a player recognizes the codec and has access to it, they can play the corresponding file. In this case, the user cannot make any difference in what video format a video file is available.

A professional video or movie is never tied to a specific compression method or video codec and formats. Depending on the application (distribution on TV, such as web content or on Blu-Ray Disc), a movie or video can appear in many different forms.

From a technical point of view, a codec is a pair of algorithms that encodes or decodes digital data.

Tech professionals will find that some of the formats in this article are called codecs, but not strictly codecs. In a more strict sense, a codec is only defined as a codec if there is an encoder on one side and a decoder as a “counterpart” on the other. If it is only encoded or only compressed, or vice versa, only decoded or only decompressed, this does not correspond to the scientific definition of a codec. However, this distinction is ignored in everyday video formats.

Codecs determine how data is compressed.

What does compression mean?

With today’s technology standards, the image information of an average high definition movie is at least 131GB, without sound. This amount of data makes it impossible for a movie to fit on a commercially available data medium (Video DVD, Blu-ray Disc).

The smaller the amount of data in a video file, the easier it will be to stream, edit, or save that file. However, at the same time, the quality of a movie or video should not be visibly reduced. Therefore, compression algorithms use sophisticated mechanisms and simplify and summarize the data. From an algorithmic point of view, the “least important” information is not saved. They are lost during the compression process and can no longer be rebuilt by decompression.

The newer codecs achieve sensational compression rates of up to 1: 500. Older video compression methods, still used today in the form of older codecs, can, conversely, “only” achieve values of 1: 5 (= 100 times worse!).

Video compression originates from the compression of a single image (so-called still image compression). Codecs for single image compression optimize each image individually and one after the other. Modern video formats thus achieve a compression ratio of 1:10 on all video.

Newer codecs have optimized this process: they use similarities between individual partial images wherever they exist, resulting in huge savings potential at 25 individual images per second. This can also be seen in the compression rates, which with the new methods are well above 1: 100, and this with little loss of quality.

Video encoding and compression processes for video formats will only gain market acceptance if the largest possible group of users can use them. That is why there are not only codecs established by global corporations like Microsoft and Apple, but also codecs that have been standardized by international organizations. The best known body of this type is the Moving Expertes Group (MPEG). Good to know: because MPEG cooperates with the International Telecommunication Union (ITU), for example, cooperating partners assign different names to identical procedures. This is why H.264, MPEG-4 AVC, MPEG-4 / Part 10 or ISO / IEC 14496-10 are the same format.