How to make video lag smooth

Let’s start with the video itself. Usually, the high-definition videos we download are basically suppressed. The huge capacity of the high-definition original film is obviously not what mobile devices can bear, and during the suppression process The various parameters in are the key to the success of playback.

What to do if the video freezes?

Let’s start with the video itself. Usually we download high-definition videos , basically all of them are suppressed. The huge capacity of the high-definition original film is obviously not what mobile devices can bear, and the various parameters during the suppression process are the key to the success of playback.

Now, let’s take a look at the complete guide to tablet video decoding.

Want high definition but not lag

Tablet computers have been integrated into our lives, and entertainment applications such as video, games, and web browsing have almost occupied the main purpose of tablets. At the same time, more and more statistical information shows that using mobile terminals to watch videos is already a very mainstream way of watching videos.

Of course, videos are divided into online videos and local videos. For online videos, the clarity will be affected by the network environment. If buffering is always performed, most people will probably choose to lower the quality by one level. , for smooth playback. As for the local videos we can control, it is obvious that most people will give priority to image quality, after all, it is comfortable to watch.

But if you use a tablet to play high-definition videos, you will also face some problems. The first thing that bears the brunt is the issue of compatibility. Faced with various sources of differently compressed films, the devices in our hands may not be able to play them. After it can be played, we also need to consider whether it can be played smoothly. After all, if it is like a slideshow, people may completely lose their desire to watch it.

The video that you have downloaded so hard cannot be played smoothly, which is undoubtedly annoying. So today we will discuss the issue of smooth playback of high-definition videos on tablets.

High Definition Video Peeling the Onion: Encapsulation Format

Let’s start with the video itself. Usually the high definition videos we download are basically suppressed and have the huge capacity of the high definition original film. , obviously not what mobile devices can withstand, and the various parameters in the suppression process are the key to the success of playback. Let us treat the video file as an onion and peel off its inner layers layer by layer.

First of all, the outermost layer is undoubtedly the encapsulation format of the video file. This can be distinguished from the file extension of the video. MP4/AVI/MKV are all different packaging formats. The function of the encapsulation format is just a container. It is a container that holds the encoded video. It also tells the device that this is a video file.

Let’s briefly talk about various common packaging formats:

MP4: This is currently the most common packaging format, and various devices have the best support for it. Basically all mobile phones All devices can be accurately identified and played.

MKV: The biggest feature of this package is that it can accommodate multiple different types of encoded video, audio and subtitle streams. It can combine multiple differently encoded videos and more than 16 audios in different formats and different languages. The subtitle stream is encapsulated into a file, which is currently one of the most mainstream high-definition encapsulation formats.

AVI: An encapsulation format introduced by Microsoft. It uses a lossy compression method for video files, but the compression is relatively high, which will lead to poor picture quality, but it is very versatile.

MOV: QuickTime video format, it is a format developed by Apple, it has small space requirements, but it is also a lossy compression format, but the picture effect is slightly stronger than AVI.

RMVB/RM: They were once brilliant. When the Internet bandwidth was insufficient in the early days, RM/RMVB had the huge advantage of small size and decent image quality; but now, although they still have huge The user base is far from its peak.

WMV: Also from Microsoft, under the same video quality, the WMV format is very small, so it is very suitable for online playback and transmission. The popularity is much lower than the previous formats.

MPG: An encapsulation format based on the MPEG-1/MPEG-2/MPEG-4 series standards, which is uncommon.

TS/M2ts: Generally the file format of Blu-ray original disc, it takes up a lot of space and is a favorite of high-definition fans who pursue extreme image quality.

PEELING THE ONION OF HD VIDEO: ENCODING FORMAT

The encapsulation format is just a shell. The core content of the video is still in the encoding, and it is also related to whether the video file can be played smoothly and smoothly. For We will also briefly introduce various types of coding.

The most mainstream video encoding formats are currently divided into two categories: MPEG and H.26X:

MPEG was developed by the MPEG Moving Picture Experts Group under the ISO International Standards Organization. It has been After a long development, the main video encodings are: Mpeg1 (vcd), Mpeg2 (used by DVD), Mpeg4 (DVDRIP uses its variants, such as: divx, xvid, etc.), Mpeg4 AVC (H.264); audio encoding is mainly MPEG Audio Layer 1/2, MPEG Audio Layer 3 (mp3), MPEG-2 AAC, MPEG-4 AAC, etc.

H.26X series

is led by ITU and focuses on network transmission, including H.261, H.262, H.263, H.263, H.263, H.264 (that is MPEG4 AVC - the result of collaboration).

H.264: The most common encoding format at present. Since it was jointly developed by ISO and ITU, there are many names for it, such as H.264/AVC, AVC/H.264, H.264/MPEG-4 AVC, MPEG-4/H.264 AVC, MPEG-4 AVC, MPEG-4 Part 10, these all represent H.264. Most Blu-ray sources currently use this encoding method.

X264: It is actually an open source form of H.264. The biggest difference from H.264 is that it is free.

MPEG-2: The DVD standard encoding method. In the early days of Blu-ray, it was also one of the three standard encodings. However, it is not so widely used in current high-definition movies.

VC-1: One of the three standard encodings in the early days of Blu-ray, now uncommon.

DIVX/XVID: DIVX caused a sensation when it was first launched. It greatly reduced the space occupied while ensuring image quality. However, it was commercialized in 2001 and is no longer open source. XVID was developed by some original DIVX enthusiasts after DIVX stopped being open source, and there is a competitive relationship between the two.

RV9/10: Mostly used in RMVB encapsulated files.

The current mainstream equipment has poor support for H.265 and can only perform soft decoding and playback

By the way, the mainstream encoding in the future must be H.265, with a stronger compression ratio, 4K The future of video cannot be separated from H. 265.

Finally, let’s talk about the code rate. It represents the number of bits transmitted per second. The higher the code rate, the greater the amount of data that needs to be processed per unit time. Of course, it can also Bring better picture quality.

Okay, we have peeled off the onion of video files, so let’s come to an end today. As for whether the video can be played smoothly, the remaining problem is left to the player.

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