Aku TONY / 2022-11-30 / Changsha / Super many pictures
No-delay live broadcast/ultra-low-latency live broadcast, mainly only test the delay situation, not related to the function of the live broadcast product, the user interface, friends who are interested can contact me for the actual test~~~
1. No delay live broadcast application scenario
- Common application scenarios of no-delay live broadcast/ultra-low delay: online teaching, corporate training, MR live broadcast, and video-to-mic interaction in teaching scenarios
- Support web live broadcast based on pure html5 pages
- Support PC-side Google browser, 360 browser, etc.
- Support WeChat viewing, various viewing browsers on mobile phones
- The live broadcast without delay is measured in milliseconds, and the screen frequency is very good
2. Test Description
A. In order to see the difference in latency, I used a calibrator that shows milliseconds:
Beijing time calibration_ Beijing time online calibration display milliseconds Beijing time online calibration display 
https://www.sucaifox.com/time/ B. [Screen collection initiates live broadcast] The live broadcast collection terminal collects millisecond-level calibrator screen (desktop software interface collection ); a video is played synchronously at the bottom of the live broadcast screen to detect the synchronization of the screen;
C. [Viewer device 1: PC + Google browser] to test and watch the live page;
D. [Viewer device 2: Android phone device+ Wechat terminal + 4G] test and watch the live broadcast page;
E. [viewer device 3: iOS mobile device + WeChat terminal + 5G] test and watch the live broadcast page;
Then, take a real-time picture.
3. Test effect picture
Picture above:
Figure 1: No-delay live broadcast/ultra-low-latency live broadcast (actual measurement group pictures)
Picture equipment description:
1. The device on the right side of the picture: the live broadcast acquisition terminal/live broadcast initiator;
2. The upper left device in the picture: [viewer device 1: PC computer + Google browser] to test and watch the live broadcast page;
3. The lower left device 1 in the picture : [Viewer device 2: Android mobile device + WeChat + 4G] test and watch the live broadcast page;
4. Device 2 in the lower left of the picture: [Viewer device 3: iOS mobile device + WeChat + 5G] test and watch the live page;
Figure 2: No-delay live broadcast/ultra-low-latency live broadcast (actual measurement group pictures)
Figure 3: No-delay live broadcast/ultra-low-latency live broadcast (actual measurement group pictures)
Figure 4: No-delay live broadcast/ultra-low-latency live broadcast (actual measurement group pictures)
Figure 5: No-delay live broadcast/ultra-low-latency live broadcast (measured group pictures)
Figure 6: No-delay live broadcast/ultra-low-latency live broadcast (actual measurement group pictures)
Figure 7: No-delay live broadcast/ultra-low-latency live broadcast (measured group pictures)
Figure 8: No-delay live broadcast/ultra-low-latency live broadcast (measured group pictures)
Figure 9: No-delay live broadcast/ultra-low-latency live broadcast (measured group pictures)
Figure 10: No-delay live broadcast/ultra-low-latency live broadcast (actual measurement group pictures)
Figure 11: No-delay live broadcast/Ultra-low delay live broadcast (actual measurement group pictures)
5. Video delay and screen synchronization
Delay time: ultra-low delay. As can be seen from the figure, the live broadcast delay is ultra-low, millimeter level; the delay of ordinary live broadcast is basically about 3-15 seconds;
Screen synchronization: the acquisition terminal is synchronized with the three viewing terminals;
6. Live Compatibility Instructions
1. Android 5.0 or above
2. iOS 9.0 or above
3. Please use the latest stable version of Google Chrome on the desktop.
4. macOS 10.10 or above
5. Windows 7 or above
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