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• Implementing Live Streaming Webinar Architecture - Need Guidance

  21 septembre 2023, par vishnugpl

  Question : I'm working on a project to implement a live streaming webinar platform, and I'm looking for guidance on the architecture and technologies to use. I have some specific requirements and constraints, and I'd appreciate any advice or pointers on how to get started.

  


  Context :
I'm tasked with building a live streaming webinar platform from scratch for our organization. Here are some key requirements and constraints :

  


  


  1. Live Video Streaming : We need to support live video streaming for
webinars, workshops, and conferences. Low latency is crucial for
real-time interaction between presenters and attendees.

     


  


  2. Scalability : The platform should be able to handle a large number of concurrent attendees, potentially thousands or more,
without compromising performance.

     


  


  3. Security : Security is a top priority. We need to ensure that only authorized users can access the webinars, and we must protect
against unauthorized recording or distribution of the content.

     


  


  4. User Interaction : Attendees should be able to ask questions, participate in polls, and interact with presenters in real-time.

     


  


  5. Recording and Playback : We also want to provide recorded versions of past webinars for on-demand viewing (HLS).

     


  


  


  Current Tech Stack :

  


  

  • Frontend : React

  


  • Backend : Node.js with Express

  


  • Database : MongoDB

  


  • Cloud Hosting : AWS

  


  


  Questions :

  


  


  • What technologies or services are best suited for handling live video streaming with low latency ?

    


  


  • How can I ensure scalability in terms of both video streaming and handling a large number of users ?

    


  


  • What security measures should I consider to protect the content and user data ?

    


  


  • Are there any recommended frameworks or libraries for building interactive features like real-time chat and polling ?

    


  


  • What's the best approach for recording and serving on-demand webinar content ?

    


  


  


  Additional Information :

  


  


  • Budget is a consideration, so cost-effective solutions are preferred.

    


  


  • Any open-source or third-party tools that can simplify development are welcome.

    


  


  • I have experience with AWS, but I'm open to other cloud providers if they offer advantages for this project.

    


  


  


• How to bybass any site that restrict multiple live streaming broadcast on a single account ? [closed]

  4 août 2024, par kino pizdec

  I am looking for a working way to use 1 video.mp4 input for 1 site, for 1 account, but broadcast in several output, for example, to different rtmp servers or stream keys. Something similar is seen on YouTube, where 1 channel has many live streams.

  


  I want to do the same, but for another site that offers the following connection options :

  


  

  • rtmp server and stream key

  


  • Real webcam

  


  • OBS Virtual webcam

  


  


  I've seen it's possible. People stream up to 4 streams simultaneously on 1 account with 1 video. The question is how.

  


  I have been tormenting the chat GPT for several days and trying different options for writing code for ffmpeg, but I have not been able to achieve more than 2 streams at the same time. I have already managed to make 2 streams at the same time twice, but I have completely forgotten how to do this, because I am constantly trying new code configurations in ffmpeg.

  


  Here is code that I use to attempt to solve my issue.

  


  @echo off
setlocal EnableDelayedExpansion

set "VIDEO_FILE=E:\MegaStream\VIDEO.mp4"

set "streams="
for /f "delims=" %%a in (stream_config.txt) do (
    set "streams=!streams! -f flv %%a"
)

:loop
start /b ffmpeg.exe ^
-re ^
-stream_loop -1 ^
-i "!VIDEO_FILE!" ^
-c:v libx264 ^
-preset veryfast ^
-tune zerolatency ^
-b:v 4000k ^
-maxrate 4400k ^
-bufsize 8000k ^
-pix_fmt yuv420p ^
-g 60 ^
-keyint_min 60 ^
-sc_threshold 0 ^
-r 30 ^
-c:a aac ^
-b:a 96k ^
-ar 44100 ^
-threads 4 ^
-x264opts "nal-hrd=cbr:force-cfr=1" ^
-max_muxing_queue_size 1024 ^
-map 0:v:0 -map 0:a:0 !streams!
-loglevel debug

echo Streaming... Press 'Q' to quit or 'R' to restart.
:input
choice /c QR /n >nul
if errorlevel 2 (
    taskkill /F /IM ffmpeg.exe >nul 2>&1
    echo Restarting stream...
    goto loop
) else if errorlevel 1 (
    taskkill /F /IM ffmpeg.exe >nul 2>&1
    echo Quitting...
    exit /b
)
goto input 


  


  Plus config file with 2 separate lines :
rtmp server 1 / stream key 1
rtmp server 2/ stream key 1

  


  I play a lot with config file and code. I edited them differently so many times so once it worked and site played my 2 stream simultaneously but now I struggle with consistent solution. Would love to hear any guesses on how to bypass these rules.
P.s.
I'm already advised many times on ethitcs and usage of this method, so I'm concerned thanks.

  


  What does not work :

  


  

  • Launching 2 copies of OBS with different servers and stream keys gives an error

  


  • Plugin for multistreaming OBS

  


  • Using 2 devices, site says "You already have a streaming sesssion" and offers to finish first to start second

  


  


• The frame count getted from FFmpeg is different from its splitting action result ?

  21 février 2020, par vividlipi

  I had executed these two commands, and I got confused by its unconsistent result.

  1. I got frame count through the command following :

     ffprobe -v error -count_frames -select_streams v:0 -show_entries stream=nb_read_frames -of default=nokey=1:noprint_wrappers=1 FPS30-536-CFR.mp4

     The result is 536.

  2. I fetched every frame and saved it to a directory :

     ffmpeg -i FPS30-536-CFR.mp4 ./frames/out%04d.jpg

     I got 537 pictures in the ./frames directory which numbers form 0001.jpg to 0537.jpg

  I had tried another video, the two results are maintained the same.

  Please give me some hints, thank you very much.

  Here is the video.