1. Technical realization level:
The technology is relatively mature, and the equipment also supports hard coding. IOS provides a ready-made Video ToolBox framework that can process the camera and streaming media data structure, but the Video ToolBox framework is only compatible with versions 8.0 and above, and x264 library software is required for those below 8.0. There are ready-made open source implementations on github, including streaming, beauty, watermark, bullet screen, like animation, filters, and playback.
Two, streaming media transmission
1. TCP:
TCP is a point-to-point protocol. Although it can ensure the reliability of data transmission, it consumes a lot of server resources, and it is difficult to guarantee the real-time transmission of data streams in situations with large data streams.
<!--[if !supportLists]-->2. <!--[endif]-->UDP:
UDP is an unreliable transmission protocol. It does not need to maintain the connection state and does not think that every data packet must reach the receiving end. Therefore, the network load is smaller than TCP, and the transmission speed is faster than TCP; but the more congested the network, the more likely it is. More packets are lost.
<!--[if !supportLists]-->3. <!--[endif]-->RTMP:
RTMP is a protocol designed for efficient transmission of video, audio and data. It realizes real-time video and sound transmission by establishing a binary TCP connection or connecting an HTTP tunnel.
<!--[if !supportLists]-->4. <!--[endif]-->FFmpeg:
FFmpeg is an open source computer program that can be used to record, convert digital audio and video, and convert them into streams. Adopt LGPL or GPL license. It provides a complete solution for recording, converting, and streaming audio and video.
3. Project construction:
Acquisition terminal
1. VideoCore is currently more well-known
At present, many well-known domestic push streaming frameworks are the secondary development of VideoCore. This framework is mainly written in C++ and supports RTMP streaming, but it is a bit obscure for iOS developers (except those who are proficient in C++). If you want to open source and free, you can choose from several well-known projects VideoCore + GPUImage + GPU-based beauty filters, and use IJKPlayer to modify them.
2. Domestically popular LiveVideoCoreSDK
The framework provides the RTMP streaming of IOS Apple mobile phone. Fill in the RTMP service address, and you can directly push the streaming. After the SDK is downloaded, the simple project configuration can be directly run, and the beauty live broadcast and filter functions are realized. Based on OpenGL, the front and rear cameras can be switched at any time , Provide callback of RTMP connection status.
This framework is one of the earliest push streaming frameworks in China. Many of them are using this SDK. The function is very complete. The author is also quite good. It is very good for learning push streaming collection related content, but it is difficult to integrate into the project (for me Say). In general, this is a very powerful push streaming SDK, almost all written in C++, and the compilation efficiency is very good. If you have the strength, it is recommended to use this framework to do the push end of your own project.
Implementation of the push end
LFLiveKit is used, and the streaming end can choose many open source projects on GitHub to replace LFLiveKit, such as VideoCore and LiveVideoCoreSDK mentioned above. For commercial use, you can choose the SDKs of major manufacturers, Alibaba Cloud and Qiniu, among them, Alibaba Cloud Live Cloud has used it. The advantage of using the live cloud is that the app can be launched quickly, and the functions are very complete. It can be a player, a push end, a set of servers, and professional customer service staff can help integrate it into the project.
Realization of the player
The player uses ijkplayer() optimized for RTMP. ijkplayer is a cross-platform player based on FFmpeg. This open source project has been used by multiple apps. Among them, Inke, Meipai and Douyu use ijkplayer (5700+). We have already packaged the ijkplayer, just drag it into the project and use it. Save the compilation process (compilation is very troublesome and error-prone).
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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
WhatsApp: +8618078869184
Wechat: +8618078869184
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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PayPal.  www.paypal.com
We recommend you use Paypal to buy our items ,The Paypal is a secure way to buy on internet .
Every of our item list page bottom on top have a paypal logo to pay.
Credit Card.If you do not have paypal,but you have credit card,you also can click the Yellow PayPal button to pay with your credit card.
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But if you have not a credit card and not have a paypal account or difficult to got a paypal accout ,You can use the following:
Western Union.  www.westernunion.com
Pay by Western Union to me :
First name/Given name: Yingfeng
Last name/Surname/ Family name: Zhang
Full name: Yingfeng Zhang
Country: China
City: Guangzhou
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T/T . Pay by T/T (wire transfer/ Telegraphic Transfer/ Bank Transfer)
First BANK INFORMATION (COMPANY ACCOUNT):
SWIFT BIC: BKCHHKHHXXX
Bank name: BANK OF CHINA (HONG KONG) LIMITED, HONG KONG
Bank Address: BANK OF CHINA TOWER, 1 GARDEN ROAD, CENTRAL, HONG KONG
BANK CODE: 012
Account Name : FMUSER INTERNATIONAL GROUP LIMITED
Account NO. : 012-676-2-007855-0
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Second BANK INFORMATION (COMPANY ACCOUNT):
Beneficiary: Fmuser International Group Inc
Account Number: 44050158090900000337
Beneficiary's Bank: China Construction Bank Guangdong Branch
SWIFT Code: PCBCCNBJGDX
Address: NO.553 Tianhe Road, Guangzhou, Guangdong,Tianhe District, China
**Note: When you transfer money to our bank account, please DO NOT write anything in the remark area, otherwise we won't be able to receive the payment due to government policy on international trade business.
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* It will be sent in 1-2 working days when payment clear.
* We will send it to your paypal address. If you want to change address, please send your correct address and phone number to my email [email protected]
* 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".
* After ship, we will send you an E-mail and give you the tracking number.
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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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