For the network anchor, if there is no handy tool, how can the beautiful image and sweet voice be conveyed to the audience? Look at the broadcast effect of popular anchors. Why are the pictures so clear and smooth, and the voice so beautiful? Why are their interactions with the audience so wonderful? In addition to their rich expressive power, is it because they have many backstage helpers? All wrong! You and her are only one distance away from the Hemiao live broadcast coding stick.

Why do you say that? It is also necessary to start from the principle of live broadcasting. Live television is to compress the image and sound together, spread in the closed-circuit television signal, and decode the television reception signal to watch. Now in the Internet era, live broadcasting has also come to the Internet. It is similar to the principle of television broadcasting. It also compresses images and sounds together and spreads on the Internet. The audience can open the network to watch live broadcasting at any time, with the effect not inferior to that of television. Now, I have not watched TV for a long time, because there are more abundant resources on the Internet, and it is much more free to watch what you want. Why always compress images and sounds? Although the effect of non compression is the best, the current technology is far from carrying the original data. The storage space of the original video data is huge. A 1080p 7s video needs about 817MB, and the network bandwidth is also high. The 10Mbps bandwidth transmission of the 7s video takes 11 minutes, far from meeting the requirements of live broadcast. This does not calculate audio. If uncompressed audio is included, more resources will be needed. Therefore, it is imperative to compress images and sounds, otherwise there will be no live broadcast.

The workflow of the Hemiao live broadcast app is shown in the figure above. The Hemiao live broadcast coding stick is responsible for the audio and video coding part, which is the most onerous and important part. The effect depends on it. The Hemiao live broadcast coding stick uses H.264 hardware coding technology, which is the most advanced coding technology at present.

H. 264 compression technology has the following advantages:

1. Low bit rate. Compared with MPEG2, MPEG4 ASP and other compression technologies, under the same image quality, the amount of data compressed by H.264 technology is only 1/8 of MPEG2 and 1/3 of MPEG4.

2. High quality images. H. 264 can provide continuous and smooth high-quality images.

3. Strong fault tolerance. H. 264 provides necessary tools to solve packet loss and other errors that are easy to occur in unstable network environment.

4. Strong network adaptability. H. 264 provides the Network Abstraction Layer, which enables H.264 files to be easily transmitted on different networks (such as the Internet, CDMA, GPRS, WCDMA, CDMA2000, etc.).

H. The biggest advantage of H.264 is its high data compression ratio. Under the same image quality, H.264's compression ratio is more than twice that of MPEG-2 and 1.5~2 times that of MPEG-4. For example, if the size of the original file is 88GB, it will become 3.5GB after compression with MPEG-2 compression standard, and the compression ratio will be 25:1, while it will become 879MB after compression with H.264 compression standard, from 88GB to 879MB, and the compression ratio of H.264 will reach an amazing 102:1. Low Bit Rate plays an important role in the high compression ratio of H.264. Compared with MPEG-2, MPEG-4 ASP and other compression technologies, H.264 compression technology will greatly save users' download time and data traffic charges. In particular, H.264 has high compression ratio and high-quality and smooth images. Because of this, the video data compressed by H.264 requires less bandwidth and is more economical in the network transmission process.

This seeding live broadcast coding rod is composed of Love to play computer games Web site, thank you for your great opportunity to try! The product is packaged in paper box, with white theme design, and the pattern is brief and lively, giving people a pleasant feeling. The logo of Hemiao live broadcast is an impressive image of Hemiao.

There is a circle of gap on the side of the packing box, which is just used to lift the cover, making it easy to open.

The product is produced by Shanghai Heniao Electronic Technology Co., Ltd. The bottom of the packaging box is directly printed with the QR code link between the service official account and the app download for convenient code scanning. According to the information, "Hemiao live broadcast" is a comprehensive live broadcast solution exclusively launched by Shanghai Heniao Electronic Technology Co., Ltd. Its products include front-end code acquisition equipment (Hemiao coding stick, etc.), mobile APP (Hemiao Live, etc.) and cloud platform. Woniao Technology is a very professional company!

The first thing I saw after opening the cover was the main character of this article: the Hemiao live broadcast coding stick, instructions and accessories were placed in the lower space.

Product family photo: 1 Micro USB data cable, 1 Type-C data cable, 1 HDMI connection cable, 1 Mini HDMI connection cable, and 1 user manual. There are a lot of accessories. It is worth mentioning that the installation manual has pasted an activation code, which is an important bar code. It is used to open the Hemiao live broadcast app, which is equivalent to the key to the app. Without it, app is a trial version, which will be limited in use.

The shell of the coding bar is made of metal, which is black all over the body and full of professional style. There are many holes in the front for heat dissipation. In actual use, I can't feel its heat at all. Although it is winter now, according to its performance, even if it is used for a long time in the high temperature environment in summer, it will not be a problem.

Its functional interfaces are distributed on both sides of the product. This side is successively distributed with USB Type-A interface, AUDIO HDMI toggle switch and Micro USB power supply interface from left to right. By the way, the user manual of the product is very thin, and the few pages of introduction are not exhaustive. Therefore, I will introduce the purpose of each interface here. The Type-A interface on the left is used to connect mobile phones and tablets (must have OTG function). Note: this interface can only use the attached cable. If it is connected to other data cables, it will not respond, because this interface can supply two-way power. When it is only connected to mobile phones, the coding stick is powered by the phone battery. If it is "PWR" The interface is connected with an external power supply, and the mobile phone can be charged through it. The middle toggle switch is used to control audio mixing. When you dial HDMI, you can use the sound in HDMI, and when you dial AUDIO, you can use an external mixer and other audio sources. The interface marked with "PWR" on the right is a Micro USB power supply interface, which is used to power the product. As long as the Micro USB data cable is connected to the charger or power bank, it can power the coding stick, and it can also indirectly charge the mobile phone, so that uninterrupted live broadcasting can be realized.  

At the other end of the coding bar, there are HDMI IN interfaces and 3.5mm AUDIO interfaces, HDMI interface is used to connect camera, UAV GoPro、 HD set-top box/network box, PC and other devices with HDMI output capability are used as the source of image acquisition. The AUDIO interface on the right is naturally connected to the mixer and other equipment with 3.5mm audio output capability, which is used for the audio source that can be switched at any time. This AUDIO interface is also a clear difference between the professional version and the ordinary version of the bar. The professional version has the AUDIO interface, but not the ordinary version. Pay attention when purchasing.

After the coding rod is connected, the Mini HDMI output interface of the digital camera is used as the input source. The image collected by the camera lens is directly displayed on the mobile phone. The mobile phone connects the coding rod to control everything. Here, the software needs close cooperation, which will be described in detail later. The coding stick can not only push streams and record videos, but also record videos while pushing streams. In use, I found that it seems to have an effect similar to the electronic shock absorption function. When the camera lens is quickly moved, the picture does not shake violently, but is very smooth. The good thing is that the audience is not prone to vertigo, which is also a benefit of hardware coding technology!

It can be seen that the size of the coding stick is very small, so easy carrying is not a problem.

Description of coding bar interface.

The link diagram of the coding stick. One mobile phone+one coding stick can play live broadcast. Hemiao Live contributes a lot. It's no exaggeration to say that the significance of purchasing the coding stick is to obtain the activation code of Hemiao Live. It is equivalent to the key of the app. It can broadcast even without the coding stick. Although it is possible to broadcast live, it uses a mobile phone camera, which is a minimal live broadcast system. It can shoot other people and record events, but it is not possible to shoot at yourself, because you cannot control your mobile phone and keep the camera facing yourself, and the effect is not as good as a coding stick. Therefore, the combination of the two is the best, Here's how to use the app.

Hemiao Live is a special app produced officially. Its download path has been printed in the packaging box and user manual in the form of two-dimensional code. It is relatively simple to download and install. The first time you run it, it will prompt you to log in. No account? Register one with your mobile phone! This is necessary.

The UI layout of the software is very simple, which is mainly divided into three parts: My Activities, Streaming, and Personal Center. "My Activity" is the place where live programs are created. "Streaming" is used to push streaming to third-party platforms, such as Panda, Douyu, Tiger Teeth, Penguin, Dragon Ball, and the whole people. Hemiao Live has integrated WeChat live sharing internally, making it easier to operate. "Personal Center" includes live broadcast settings, Hemiao coding stick, USB camera and other management settings. The classification is more scientific.

There are many options for live broadcast settings, and various output bit rates can be adjusted. There is also a network speed measurement assistant, which can help you measure the network speed, so as to give a reasonable bit rate value. For those who do not know how to convert the network speed and bit rate, they can easily determine the maximum bit rate value, so as to ensure the best live broadcast effect. Here, the above transmission speed is the most important.

The connection of the coding stick is very simple. Enter from "Personal Center ->Hemiao Coding Stick", select "Open Now", and scan the opening code on the user manual. If you don't have a coding stick in your hand, you can click "GO" below, and the purchase address will appear. Just buy one.

When the phone is inserted into the code bar, it will automatically prompt for access. Just click OK. The operation is not complicated.

The help document of Hemiao Live is detailed, and it is convenient to check online at any time and anywhere. At present, the version number of Hemiao Live is 1.1.9.

It is very convenient to add live programs. You can add them by clicking the "+" in the upper right corner of the "My Activity". Here is a hint: the activity is valid within 20 minutes after the creation of the activity, and it is valid within 24 hours after the activation of the encoding bar function. In other words, without a coding stick, you can only live for 20 minutes, which is an experience! It's different with a coding stick. It can be broadcast 24 hours a day, which is enough to deal with most situations. Therefore, the activation code mentioned earlier is very important.

The first time you enter the program, the app will give you an operation prompt. It is easy to follow steps 1, 2, and 3.

The play source menu on the left side is rich, supporting mobile camera, Hemiao coding stick, USB camera, Hemiao encoder, etc. Here you have to choose Hemiao coding stick. This step must be done, otherwise the control menu below will not be available.

The control menu below is rich in functions, and various functions are the favorite of anchors.

Video can be switched at any time.

The sound source can also be switched at any time. It's really arbitrary.

It can be streamed and recorded separately, or recorded at the same time, so that the host can review and summarize experience.

The atmosphere and sound effects can be said to come at any time. They are the most popular at present.

The picture effect can also be adjusted instantly, which is convenient and fast.

There are also bullet screen and whitening functions. The beautiful or handsome anchor will be revealed. It's a great function!

The function of adding layers on the right side is very powerful. You can add time display, picture LOGO, edit subtitles, display scores, and customize titles. It basically covers all the display modes of TV stations' programs. It is very convenient for event reporting and personal anchors, which is equivalent to integrating the functions of TV stations.

App integrates a wealth of templates to produce the same effect as TV stations.

The App integrates the WeChat live sharing function to share the pictures. The audience can access the live broadcast by scanning the QR code with WeChat, which is very convenient.

Here is a simple test of the CPU utilization rate during live broadcast. The average is about 75%, which is not low. My mobile phone chip is MTK P10, which is very stable and can be used. Other chips that are better than P10 are not a problem. Almost all mainstream mobile phones can use it. In addition, the official purchase page also recommends several competent low-end models for reference.

Conclusion: This Hemiao live broadcast coding stick has the hardware H.264 encoding capability. One mobile phone is enough to enable it to work, with extremely low power consumption. It is a sharp tool for live broadcast coding. It is small, portable, and it is no longer difficult to go live. It can also supply power for mobile phones when connected to an external power supply, so that the live broadcast time is more guaranteed. The supporting app (Hemiao Live) is powerful and has all the functions required for live broadcast, which is easy to operate and stable. The whole seeding live broadcast system composed of them can accomplish the live broadcast task very well, so the anchors may as well give it a try.

Get free trials and professional reviews every day, follow the Woaiqiku official account, and get 2 free opportunities to receive digital products every day!