Various problems will be encountered during the development of live broadcast software, and push-pull streaming as an important process in live broadcast is no exception. Pushing usually needs to use push tools or SDK at the push end to push the video stream to the video center, but it is not always possible to push the stream successfully. If there is an unsuccessful push, how should we solve it? We can start with the following ideas and solve them one by one.
1. Audio and video encoding format
Generally speaking, the requirements for live broadcast are H.264 video stream and AAC audio and video stream encoding format. If the encoding format cannot be guaranteed to meet this requirement, then during the live broadcast process, problems are likely to occur between different playing video streaming protocols, resulting in unsuccessful push streaming.
2. The number of push channels reaches the limit
During the development of the live broadcast software, for each user, there are certain restrictions on the number of concurrent push streams for a single domain name and live broadcast domain name. Generally, a single user will limit the creation of 20 live broadcast domain There can only be 20 concurrent push streams. In addition, if the corresponding application name is configured for real-time transcoding, then the application name can only push 10 live streams concurrently. Therefore, once the number of concurrent push streams exceeds the limit, push streams will fail. However, we can check the current number of concurrent push streams and make relevant settings.
3. Check the client push method
Common streaming tools include OBS, FFmpeg and flash software. If there is a problem with the settings when viewing the client streaming tool, you need to pay attention to the URL and streaming key settings in the streaming settings. The URL mainly includes the video center and application name, and the stream key includes the stream and query string parameters.
4. Authentication failed
After enabling the authentication function, you need to add authentication parameters to both the push and play streams of the domain name. Once the authentication parameter expires or the parameter is incorrect, it will directly cause the push to fail. Therefore, after the development of the live broadcast software is completed, the authentication parameter is also an item that we need to pay attention to.
5. The network is abnormal
Push streaming needs to push the live stream to the video center through RTMP. If the network environment is poor or abnormal during the push, it may cause the push to fail.
6. Whether to be added to the blacklist
The live broadcast usually provides a prohibition on the push of a certain application name and the name corresponding to the query string. Once it is added to the blacklist of the push, the push will fail.
7. Use extended fields for timestamps
In terms of video and audio frames, the client's push stream usually has two timestamps, which are used to represent the frame decoding timestamp and the display timestamp. After the development of the live broadcast software is completed, if the timestamp is greater than 24 bits, it is necessary to confirm whether the video frame of the push streaming client is greater than the maximum parameter, so as to make certain changes to this, otherwise it will cause the push to fail.
After the development of the live broadcast software is completed, if the problems that arise during the push are not taken seriously, the video stream cannot be successfully pushed out, resulting in users not being able to watch it on the playback side. Moreover, as one of the important steps in the live broadcast process, push streaming needs to be paid attention to.
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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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Pay by Western Union to me :
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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.
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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
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