Hướng dẫn Config Nginx-RTMP + Adaptive Streams
- 240p Chậm tương đương với 288kbps
- 480p Chuẩn tương đương với 448kbps
- 540p Chuẩn tương đương với 1152kbps
- 720p Cao tương đương với 2048kbps
- Source resolution, source bitrate
Để giải quyết chuyện đó thì dưới đây sẽ cõ một ví dụ về cấu hình Nginx
Cấu hình Nginx
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worker_processes auto;
events {
# Allows up to 1024 connections, can be adjusted
worker_connections 1024;
}
# RTMP configuration
rtmp {
server {
listen 1935; # Listen on standard RTMP port
chunk_size 4000;
# This application is to accept incoming stream
application live {
live on; # Allows live input
# Once receive stream, transcode for adaptive streaming
# This single ffmpeg command takes the input and transforms
# the source into 4 different streams with different bitrate
# and quality. P.S. The scaling done here respects the aspect
# ratio of the input.
exec ffmpeg -i rtmp://localhost/$app/$name -async 1 -vsync -1
-c:v libx264 -c:a libvo_aacenc -b:v 256k -b:a 32k -vf "scale=480:trunc(ow/a/2)*2" -tune zerolatency -preset veryfast -crf 23 -f flv rtmp://localhost/show/$name_low
-c:v libx264 -c:a libvo_aacenc -b:v 768k -b:a 96k -vf "scale=720:trunc(ow/a/2)*2" -tune zerolatency -preset veryfast -crf 23 -f flv rtmp://localhost/show/$name_mid
-c:v libx264 -c:a libvo_aacenc -b:v 1024k -b:a 128k -vf "scale=960:trunc(ow/a/2)*2" -tune zerolatency -preset veryfast -crf 23 -f flv rtmp://localhost/show/$name_high
-c:v libx264 -c:a libvo_aacenc -b:v 1920k -b:a 128k -vf "scale=1280:trunc(ow/a/2)*2" -tune zerolatency -preset veryfast -crf 23 -f flv rtmp://localhost/show/$name_hd720
-c copy -f flv rtmp://localhost/show/$name_src;
}
# This application is for splitting the stream into HLS fragments
application show {
live on; # Allows live input from above
hls on; # Enable HTTP Live Streaming
# Pointing this to an SSD is better as this involves lots of IO
hls_path /mnt/hls/;
# Instruct clients to adjust resolution according to bandwidth
hls_variant _low BANDWIDTH=288000; # Low bitrate, sub-SD resolution
hls_variant _mid BANDWIDTH=448000; # Medium bitrate, SD resolution
hls_variant _high BANDWIDTH=1152000; # High bitrate, higher-than-SD resolution
hls_variant _hd720 BANDWIDTH=2048000; # High bitrate, HD 720p resolution
hls_variant _src BANDWIDTH=4096000; # Source bitrate, source resolution
}
}
}
http {
# See http://licson.net/post/optimizing-nginx-for-large-file-delivery/ for more detail
# This optimizes the server for HLS fragment delivery
sendfile off;
tcp_nopush on;
aio on;
directio 512;
# HTTP server required to serve the player and HLS fragments
server {
listen 80;
location / {
root /path/to/web_player/;
}
location /hls {
types {
application/vnd.apple.mpegurl m3u8;
}
root /mnt/;
add_header Cache-Control no-cache; # Prevent caching of HLS fragments
add_header Access-Control-Allow-Origin *; # Allow web player to access our playlist
}
}
}
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Cách sử dụng :
Get Stream hoặc một video có sẵn sủ dụng FFMPEG stream tới : rtmp://yourserver/live/{{key-stream}} với key-stream bạn muốn đặt gì thì đặt
Viewer xem live với link là: rtmp://yourserver/hls/{{key-stream}}.m3u8
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