security solutions

Regarding the integration of the classroom recording system, many school teachers and the managers in charge of school equipment cannot understand how to do this thing and how to do it well! This thing is simple and complicated. Sometimes it seems that it is okay to figure it out clearly… First of all, it is not to say that you can just buy a camera or make a microphone and put it there. It has to connect all the multimedia devices in the classroom, such as projectors, screens, computers used by teachers, and newly created recording hosts, cameras (maybe more than one, including those who take pictures of teachers, students, and several heads), microphones, etc., so that they can be obedient and cooperate with each other to record the class situation. They also have to ensure that the recorded things are clear and the sound is heard! That's what it means

1. Equipment compatibility survey steps : First, write down all the old equipment, new equipment models, and interface types in the classroom (is it HDMI, USB or the older VGA port?), and then take this list to ask the manufacturer of the recording and broadcasting system, or find someone who knows the industry to see if these things can be cooked in one pot, that is, can they all be collected and worked normally? If there is incompatible, you have to find a way, such as buying a converter or something!

2. Key points for avoiding wiring and signal interference : Camera and microphones need to be wired, and some poe cameras also need to keep network cables, and more than one! When wiring, try not to tie it with strong electric wires (that is, 220V wires), otherwise there may be such a "sizzling" noise when recording it! You also need to pay attention to the quality of the cable. Don’t buy thin wires that are thick with your fingers in cheap price. Then the signal will not work and it will be troublesome! Provide global procurement services for weak current intelligent products! Take a look at these professional places and you may be able to buy the right line!

3. Software configuration and time synchronization skills : The recording and broadcasting system generally has its own management software, which must be installed on a special computer, or the recording and broadcasting host has its own system. The settings include recording parameters, such as the resolution setting (1080P is now basic?), the frame rate (30 frames should be enough, unless you want to make a special fancy), and where the file exists after recording (is it a local hard drive or a school server?). The most important point is that all connected devices must be adjusted to the same time, otherwise the sound and picture cannot be recorded, and the effect will be too bad.

Q: How to ensure that the picture can be cut into the recording system at the same time when hoisting projectors and recording cameras in classrooms of different brands?

Answer: This is usually the recording host has several input interfaces, such as HDMI in 1, HDMI in 2, etc. You connect the output screen of the projector (if the projector has a loop interface, if it doesn't have it, you have to connect one more cable from the computer) to an input from the recording host, and then connect the other cameras to other inputs respectively. Then set which input corresponds to which screen is in the recording and broadcasting software, for example, HDMI 1 is the teacher's computer PPT, HDMI 2 is the teacher's close-up… In this way, the software can automatically or manually switch the screen according to the settings. It sounds a bit confusing? It’s okay to calm down and do it step by step, or find a master who knows how to do it!

4. User permission division and operation training rules : If the teacher uses the permissions, they may need to record video, pause, stop, and simply watch and playback; the administrator may have the permission to delete unnecessary video files, download them uniformly, etc. This is set in the background of the recording and broadcasting software! After getting the permissions done, you must provide training for the teacher. Don’t think that if the teacher can use the computer, you can do anything. Sometimes the recording and broadcasting system operation is not necessarily so intuitive. It is best to let the teacher try it by himself!

5. Simplified operation suggestions for linkage control and automated scripts : Advanced ones can also set up linkage, such as when the teacher says "class", or presses a specific button on the podium, the recording and broadcasting system will start by itself, aim the camera at it, and turn on the projector… This requires the cooperation of a more complex central control system, and even write a simple running script (yes, this script is not a script that allows you to write essays, but a command that the computer can understand). However, this may not be so complicated for general basic situations!

Q: The recording and broadcasting system has been integrated, and the recorded video is too large and cannot be saved?

Answer: There are usually several ways. First, adjust the video compression format in the recording and broadcasting software settings, such as encoding with H.265, which is much smaller than the older H.264, and the picture quality is also OK! The second is to regularly manually move the recorded old videos to the school’s special file server or network storage (that is, what people often call NAS). If the budget is enough, the entire automatic archive plan will certainly be better, but it will cost more! So when you first pick the recording and broadcasting system, you have to ask clearly about storing this!

Personally, the key to this matter is to think carefully about the preliminary planning. Don’t be greedy for the equipment selection and buy some miscellaneous brands that are not easy to integrate. Then find an experienced technical team, especially a school project, to do it. It can avoid many unjust paths and save a lot of worries! Although it sounds like there are many steps, it will be very helpful for teachers to use it in the future. It is a great thing that is very helpful for the sorting of teaching resources and students’ reviews! Don’t worry about getting on the move, compare and ask more!