A solution for organizing video conferencing on a high-load portal?

Question

Yii

Good time of day, dear habra-community.
I ask you to share your thoughts / experience in finding a solution (paid or free) for organizing a video conferencing module.
The portal was developed using the yii php framework. MySql is used as a DBMS.
Necessary functionality:
1) Organization of video conferences with the ability to connect to it a large number of viewers;
2) Broadcasting of the video stream both with the help of a video camera and with the help of a downloadable video;
3) Ability to save video to a file and minimal processing (cropping);
4) Ability to connect viewers to the stream on the go;
5) Expandability by increasing the number of servers.
Desirable features:
1) Lack of external programs (only web);
2) Search by saved files;
3) Restriction of access to streams/files;
4) The presence of a chat and its moderation by the author;
5) Availability of clear documentation;
6) Ease of integration.

Answer 1

Alternatively _www.videowhisper.com/?p=Video+Conference

Answer 2

It all depends on how much effort you are willing to invest in the broadcasts themselves. How are you going to make them. Someone wants to take a webcam, open a browser and broadcast their fuck to everyone. In squares means in squares. Someone puts a camera for a couple of kilobucks, 3-4 lamps and a chromakey in the background, prepares backdrops and subtitles on branded substrates in advance. Someone wants to be able to show pictures / slides on the screen, including from PDF / DOC. And crawl over them with a camera (with an animated zoom!). And broadcast all this in different quality, and even in different languages ​​(with simultaneous translation).

Answer 3

It's strange that no one has recommended erlivideo yet .

Answer 4

You can use Wowza Media Server for video broadcasts in the origin->edges link:
The origin server is the source of video streams, which, upon request, sends them to edge servers, which in turn send the requested videos to clients.

Answer 5

This project www.kaltura.org provides both server and client side