Video Encoding and Encapsulation Format Parsing

To put it simply, the MKV and AVI formats only encapsulate containers, which encapsulate video streams and audio streams. The container does not affect the image quality. What affects the quality is what is encapsulated in the container. Therefore, changing the container does not affect definition subtitle audio.

I would like to add some basic knowledge about video. Maybe there is something wrong with it.

First, the video format does not determine the definition. The definition of a video depends on the resolution, the source of the video, and the bit rate. Of course, some specific formats determine their own definitions. However, it is certain that a movie uses the same video encoding. The clearer the video, the larger the size.

Currently, videos are composed of audio streams and video streams. The format is to encapsulate containers, such as rmvb, MKV, Avi, mpg, and Ts. Common video streams include MPEG2, MPEG4, h264, and vc1. MPEG2 is a relatively old-Fashioned Video Encoding with a low compression rate. MPEG4 is a relatively new encoding, which is commonly used in DVD films. The compression ratio is average. The latest MPEG4 video encoding is Xvid, and the older DivX. h264 (x264 is a type of h264) is a new video encoding. It is common in HD videos and has a high compression ratio. However, it requires a high computing capability and high requirements on computer configuration. Vc1 is a new generation of video encoding launched by Microsoft, which is similar to h264.

According to the compression ratio comparison, for the same movie, The same definition, MPEG2 volume> MPEG4> h264 = vc1. but the higher the compression ratio, the higher the computer requirements.

2. Let's talk about several common encapsulated containers (that is, the format)

1. the convenience of rmvb and rmvb lies in the small size of built-in subtitles that cannot be modified (it is also a hard injury of rmvb. We often see advertisements on rmvb and some undesirable subtitles ). But the size and rmvb video encoding (real9.0) determine that rmvb will not be too clear, the resolution is only (640-800) * (272-500 ), the bit rate is only 4-5 MB/minute. Someone may have said that rmvb is clear on my computer. Of course, it is possible that the resolution of a 17-inch flat screen display is usually 1024*768. If rmvb reaches 720*300, it looks clear. However, rmvb can only achieve the quality of the DVD. For details about the DVD, HDTV, Blu-ray, and hddvd, see below.

2. Avi and Avi are a video format released by Microsoft. As video encoding is updated, Avi can encapsulate the updated video encoding to reach high definition. In the past, DVDs used MPEG2 encapsulation of AVI, which is very large. The size of a high-quality DVD movie is generally 4-5 GB, but the size after DivX or Xvid encoding is only 650-700 mb, which is only 1/8 of the original DVD capacity, the image quality is similar to that of the DVD, making the AVI format one of the preferred formats for movie enthusiasts.

3. MKV and MKV are popular video formats. They are compatible with many video encoding formats, such as DivX, Xvid, realvideo, h264, MPEG2, and vc1. Because it is a folk format, there is no copyright restriction, and it is easy to play, so the official release of video films do not use MKV, online production and download are common.

4. mpg, that is, MPEG. Video Encoding is generally in the mpeg family, such as 1, 2, and 4.

5. Ts is a dedicated HD encapsulation container. Most common in the original Blu-ray, hddvd conversion video, usually using h264, vc1 and other latest video encoding.

3. Let's talk about the official release of various CDs for movies.

Because video clips of VCD and VCD can only adopt mpeg1 and other vintage video encoding, the resolution can only reach more than 300*100, and the definition is very poor, almost eliminated.

DVD, which is encoded in MPEG2 format. It is large and requires 4-5 GB for a 120-minute video. after Xvid or DivX re-encoding, a 120-minute video is only 700-1400 m, and the definition is the same as that of MPEG2. The DVD is standard definition and SD.

Hddvd, a new generation of disc storage, a single hddvd disk can reach a capacity of 15-50 GB, can provide greater resolution, bit rate. R & D has been stopped because of its loss to Blu-ray. HD.

Blu-ray, BLU-RAY disk, (BD) a new generation of CD storage, General blue CD can reach 20g or more capacity, set to reach an astonishing 100g, so you can store clearer film. HD.

Iv. Definition.

Due to its limitations, rmvb can reach the definition of a DVD disk at most.

Avi can encapsulate different video codes to achieve different definitions and sizes.

MKV is the same as Avi, but more free.

Ts hd dedicated encapsulation container, commonly used Blu-ray or hddvd original non-destructive conversion of films.

5. Conclusion: rmvb is small in size. If you do not pay much attention to clarity or do not have high requirements on clarity, you do not care much about built-in subtitles and advertisements, but require less storage space and less bandwidth, select to download the rmvb video.

Avi: The 700 m Avi definition of a DVD press = rmvb of m of a DVD press. however, Avi can achieve higher definition through different video encoding. For example, Avi with h264 encapsulation can achieve a resolution of 1920*1080.

MKV is the same as Avi

TS, dedicated to high definition, so the volume is also very large. After a Blu-ray movie is lossless converted to the TS format, it is generally 20 GB or more a 120 minute movie.

The definition not only depends on the resolution, but also on the film source. For example, for a movie with the same DVD and Blu-ray pressure, the Blu-ray pressure must be clear and small in size.

Recommended Website: www.verycd.com

Recommended Format: x264 video-encoded BDRip (or hddvdrip) MKV video. Generally, a 1.4 GB video is much clearer than rmvb or Avi.

Rip means compression, and RE. remux means lossless original.

In addition, there are video standards such as 720 p and 1280 p. The 720 p resolution is 1920*1080, And the 1080p resolution is *. Of course, the higher the Resolution, the larger the film, the same principle applies to images of different resolutions.

Note:

What is remux and why is remux selected?

High-Definition film programs commercially available products, HD-DVD and blue-ray two. Not to mention the high price of their discs relative to the national revenue, there is no formal channel for sale in China. However, we can still get HD video program data through the network.

Blu-ray and HD-DVD programs, its main film (that is, the film or TV series itself, does not contain highlights and interviews and other content) are basically using full-HD 1080p format, so, to get video files of the same quality, we have two options: the original disk and remux.

The so-called remux is through some software, the Blu-ray and HD-DVD disc in the main audio, video data is extracted, and packaged into the video "container", this container is usually ts or Avi.

Remux processing for Blu-ray and HD-DVD is not a simple task. At the beginning of Blu-ray and HD-DVD standards, technicians first considered encryption. After the CSS encryption of the DVD is cracked, the piracy of the DVD causes a huge amount of copyright loss. AACs (Advanced
Access Content System (Advanced Access Control System) has high hopes, but it has not been long before it was cracked. Subsequently, Blu-ray launched the BD + encryption method. But it was also cracked in the spring of 2008.

For example, in the latest version of anydvd, you can extract the main part from the BD + encrypted Blu-ray disc.

The remux video files provided by the network all have the advantages of convenient playback, subtitle addition, lossless quality, and a small amount of files (not small as the original disk. Of course, if you are a fan of perfection, you can select the original disk image to favorites. The original disk contains all the fancy 3D menus, interactive video comments, and highlights. And can be burned to the Blu-ray Disc, it is equivalent to making a Blu-ray disc.