It’s not that simple to build a live broadcast system. There are many knowledge points to pay attention to, not only the push end and the pull end, but also the collection, compression, encoding, and decoding. CDN services and servers are also very important when building a live broadcast system. The editor here will not go into details one by one, but mainly talk about the knowledge points of push and pull ends.
1. The four links of the push end
(1) First is the collection link: Collection refers to the collection of images and sounds. Simply put, it allows the web video live broadcast system to be connected to the anchor camera, and the software can obtain external audio and video information.
Then there is the pre-processing stage: This is also the stage commonly known as beauty, which requires us to add beauty, sex, cute beauty and other effects to the web video live broadcast system. This algorithm needs to involve GPU programming. The difficulty in this stage is not Beauty, because beauty is usually solved using SDK, the focus is on the GPU ratio.
(2) At present, the hardware configuration of mobile phones on the market has become higher and higher, but on some old models, power consumption is still a big problem. Too high GPU usage will cause the phone to become hot, the camera will drop frames and even the software Crash back.
(3) The next step is encoding. Encoding is for compressing data and for better decoding. We usually choose to use hard coding to balance the efficiency ratio between coding speed and coding quality, but soft coding still has higher picture quality. There are also ways that users are willing to use soft coding. Therefore, when designing the system at the beginning, we should design both soft coding and hard coding at the same time.
(4) The first operation on the streaming end is to push the video to the server to facilitate the distribution and streaming of the live video. At this point, all the settings on the host end are over. There are a few difficulties here.
2. Difficulties in the design of the push end
The current mainstream mobile phone systems include ios and Android. IOS is good, with fewer models, and it is easy to adapt, but the difference between the hardware of the Android market mobile phone is very serious, and it takes a lot of effort to make the Android models. Otherwise, the user experience will be very poor in the later stage, and there may be an accident like the previous ** Honor update-a certain model repeatedly crashes or cannot enter the game-on the establishment of the web video live broadcast system, If you don’t do a good job of adapting Android models, the result is that the live broadcast platform loses one or several mobile phone users, which will cause word-of-mouth impact and a waste of traffic.
3. Three links to pull the stream
(1) If the user wants to watch the live broadcast, he must go to the server to pull the stream. What is the pull stream? You open the video website, click the video, and the time period between you click the video and the video is opened, that is, your client requests the server to pull the stream , This step should pay attention to the opening time of the first screen, the shorter the time, the more likely the audience will be left behind.
(2) If there is encoding, there must be decoding. Android adaptation problems will occur in encoding. Of course, this problem will also occur in decoding. The advantage of the built-in encoding and decoding program of the web video live broadcast system is that it can avoid different mobile phone models. , Different video formats can not be played by different models.
(3) The rendering process can be handed over to the mobile phone, and the user can watch it after playing.
The above is about the difference between the push end and the pull end of the live broadcast system, as well as the difficulties of the design. It has been helpful to everyone in the past. For more information about the development of live broadcast and short video, please pay attention to the editor.
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How far(long) the transmitter cover?
The transmission range depends on many factors. The true distance is based on the antenna installing height , antenna gain, using environment like building and other obstructions , sensitivity of the receiver, antenna of the receiver . Installing antenna more high and using in the countryside , the distance will much more far.
EXAMPLE 5W FM Transmitter use in the city and hometown:
I have a USA customer use 5W fm transmitter with GP antenna in his hometown ,and he test it with a car, it cover 10km(6.21mile).
I test the 5W fm transmitter with GP antenna in my hometown ,it cover about 2km(1.24mile).
I test the 5W fm transmitter with GP antenna in Guangzhou city ,it cover about only 300meter(984ft).
Below are the approximate range of different power FM Transmitters. ( The range is diameter )
0.1W ~ 5W FM Transmitter ：100M ~1KM
5W ~15W FM Ttransmitter : 1KM ~ 3KM
15W ~ 80W FM Transmitter : 3KM ~10KM
80W ~500W FM Transmitter : 10KM ~30KM
500W ~1000W FM Transmitter : 30KM ~ 50KM
1KW ~ 2KW FM Transmitter : 50KM ~100KM
2KW ~5KW FM Transmitter : 100KM ~150KM
5KW ~10KW FM Transmitter : 150KM ~200KM
How to contact us for the transmitter?
Call me +8618078869184 OR
Email me [email protected]
1.How far you want to cover in diameter ?
2.How tall of you tower ?
3.Where are you from ?
And we will give you more professional advice.
About Us
FMUSER.ORG is a system integration company focusing on RF wireless transmission / studio video audio equipment / streaming and data processing .We are providing everything from advice and consultancy through rack integration to installation, commissioning and training.
We offer FM Transmitter, Analog TV Transmitter, Digital TV transmitter, VHF UHF Transmitter, Antennas, Coaxial Cable Connectors, STL, On Air Processing, Broadcast Products for the Studio, RF Signal Monitoring, RDS Encoders, Audio Processors and Remote Site Control Units, IPTV Products, Video / Audio Encoder / Decoder, designed to meet the needs of both large international broadcast networks and small private stations alike.
Our solution has FM Radio Station / Analog TV Station / Digital TV Station / Audio Video Studio Equipment / Studio Transmitter Link / Transmitter Telemetry System / Hotel TV System / IPTV Live Broadcasting / Streaming Live Broadcast / Video Conference / CATV Broadcasting system.
We are using advanced technology products for all the systems, because we know the high reliability and high performance are so important for the system and solution . At the same time we also have to make sure our products system with a very reasonable price.
We have customers of public and commercial broadcasters, telecom operators and regulation authorities , and we also offer solution and products to many hundreds of smaller, local and community broadcasters .
FMUSER.ORG has been exporting more than 15 years and have clients all over the world. With 13 years experience in this field ,we have a professional team to solve customer's all kinds of problems. We dedicated in supplying the extremely reasonable pricing of professional products & services. Contact email : [email protected]
Our Factory
We have modernization of the factory . You are welcome to visit our factory when you come to China.
At present , there are already 1095 customers around the world visited our Guangzhou Tianhe office . If you come to China , you are welcome to visit us .
At Fair
This is our participation in 2012 Global Sources Hong Kong Electronics Fair . Customers from all over the world finally have a chance to get together.
Where is Fmuser ?
You can search this numbers " 23.127460034623816,113.33224654197693 " in google map , then you can find our fmuser office .
FMUSER Guangzhou office is in Tianhe District which is the center of the Canton . Very near to the Canton Fair , guangzhou railway station, xiaobei road and dashatou , only need 10 minutes if take TAXI . Welcome friends around the world to visit and negotiate .
Contact: Sky Blue
Cellphone: +8618078869184
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E-mail: [email protected]
QQ: 727926717
Skype: sky198710021
Address: No.305 Room HuiLan Building No.273 Huanpu Road Guangzhou China Zip:510620
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English: We accept all payments , such as PayPal, Credit Card, Western Union, Alipay, Money Bookers, T/T, LC, DP, DA, OA, Payoneer, If you have any question , please contact me [email protected] or WhatsApp +8618078869184
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First BANK INFORMATION (COMPANY ACCOUNT):
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Beneficiary: Fmuser International Group Inc
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* It will be sent in 1-2 working days when payment clear.
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* If the packages is below 2kg,we will be shipped via post airmail, it will take about 15-25days to your hand.
If the package is more than 2kg,we will ship via EMS , DHL , UPS, Fedex fast express delivery,it will take about 7~15days to your hand.
If the package more than 100kg , we will send via DHL or air freight. It will take about 3~7days to your hand.
All the packages are form China guangzhou.
* Package will be sent as a "gift" and declear as less as possible,buyer don't need to pay for "TAX".
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For Warranty .
Contact US--->>Return the item to us--->>Receive and send another replace .
Name: Liu xiaoxia
Address: 305Fang HuiLanGe HuangPuDaDaoXi 273Hao TianHeQu Guangzhou China.
ZIP:510620
Phone: +8618078869184
Please return to this address and write your paypal address,name,problem on note: |
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