Hy, I'm Khyrul Bashar, 4th year CSE student from Bangladesh. I've participated successfully in GSoC-2015. I've coded the PDFDebuuger app of PDFBox project in apache foundation. This year I hope to code Openmeetigns-550. I find it an interesting problem but to solve available documentation resources is almost none like the issue says "there is hardly any documentation on that available in the internet". So far I've build the OpenMeetings source code and gone through the source code in brief. I'm trying to understand how the Openmeetings conference live streaming works. This is I've understood so far, in client side flash 'publish' the media and in server side that other clients in same scope is made aware about the video. ScopeApplicationAdapter class which has extended ApplicationAdapter class of Red5 gets notified on a new video stream in 'streamPublishStart' method. And from there Openmmetings messages other concerned clients via their 'Connection'. In flash client side upon receving the message the video is playback. All the necessary url, port are stored in 'FlexGlobals.topLevelApplication', One thing I don't understand how "FlexGlobals.topLevelApplication" data are populated in the first place. Pardon me if it's trivial, I've read the ActionScript code today for the first time. Now my understanding of the issue is, we have to implement a way so the video published by the client is available in three resolution (low, medium, high) to other clients in the same room. As red5 takes care of handling the live streaming itself(it's my understanding), to make any versions of the video but original available we need to intervene in the middle. e.g. like recording we add stream listener and from there data is pulled using 'StreamPacket'. From this, we make an input for an FFmpeg command which gives us transcoded videos as our requirement. Then those outputs are relayed to other clients according to their demand. I'm concerned about this approach as there is a real chance for latency as one more step is added in the middle. Again as for the last three days, I spent most of the time just to understand red5 and yet not really confident (thanks to red5 documentations!), I haven't really chance to look at FFmpeg workings, so I'm not sure, how the data received from the client is made available to FFmpeg to transcode. I would appreciate some guidance here. Please feel free to correct my understanding of the problem and application architecture.
Thanks Khyrul Bashar PS: Why Red5 documentations are so rare? I'm not complaining just curious. Red5 seems a decent media server used by many e.g. facebook.
