Seven standards to judge the advantages and disadvantages of distributed system
Method 1: professional video playback
Through professional video, we can quickly judge the large screen synchronization.
Test method: multiple splicing screens play the same video (professional test video is recommended), and compare the difference between dynamic lines, stopwatch and frame number displayed in the screen.
Test method description: the signal source of test video will be played and displayed on different screens of large screen. Take photos or slow action photography by camera, compare the stopwatch values displayed on different screens, whether the frame rate serial number of the picture is the same frame and the same Ms. If the frame sequence number is different, the large screen is not synchronized. According to the corresponding stopwatch time difference, the severity of the out of sync can be defined.
Good splicing synchronization (dynamic color bar is continuous, there is no tearing phenomenon at screen link, stopwatch at the same position on screen, and frame rate serial number is the same)
Poor splicing synchronization (there are different dislocation of left and right or up and down dynamic color bar, stopwatch at the same position on screen, and different frame rate serial number)
Method 2: fast dynamic image playback
In the case of not having the conditions, you can also play fast motion action video, character video for visual observation.