NGINX和FFMPEG生成动态自适应流

Question

在此配置文件中https://github.com/TareqAlqutami/rtmp-hls-server/blob/master/conf/nginx.conf#L24-L30

对于每个接收到的流，对自适应流进行转码ffmpeg命令接受输入并将源代码转换为4具有不同比特率和质量的不同流。#这些设置尊重纵横比。

我们如何动态生成变体？即，对于1080p输入，生成所有变体，但对于240p输入，不生成任何变体

Answer 1

我的启动工作正常您需要配置日志并查看它给出的错误。但另一种解决方案是手动检查您可能正在使用未安装的编解码器

我会检查你的坦克，也许我可以在这里贡献

application live {
live on; # Allows live input
exec ffmpeg -i rtmp://localhost/live/$name -threads 8
-c:v libx264 -profile:v baseline -b:v 768K -s 640x360 -vf "drawtext= fontcolor=red: fontsize=20: fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf: text='360': x=10: y=10:" -f flv -c:a aac -ac 1 -strict -2 -b:a 96k rtmp://localhost/show/$name_360
-c:v libx264 -profile:v baseline -b:v 1024K -s 960x540 -vf "drawtext= fontcolor=red: fontsize=20: fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf: text='480': x=10: y=10:" -f flv -c:a aac -ac 1 -strict -2 -b:a 128k rtmp://localhost/show/$name_480
-c:v libx264 -profile:v baseline -b:v 1920K -s 1280x720 -vf "drawtext= fontcolor=red: fontsize=20: fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf: text='720': x=10: y=10:" -f flv -c:a aac -ac 1 -strict -2 -b:a 128k rtmp://localhost/show/$name_720
-c:v libx264 -profile:v baseline -b:v 4000K -s 1920x1080 -vf "drawtext= fontcolor=red: fontsize=20: fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf: text='720': x=10: y=10:" -f flv -c:a aac -ac 1 -strict -2 -b:a 128k rtmp://localhost/show/$name_1080;
}

application show {
live        on;     # Allows live input from above
hls         on;     # Enable HTTP Live Streaming
# hls_fragment  5s;
# Pointing this to an SSD is better as this involves lots of IO
hls_path /dest;
#hls_variant _240 BANDWIDTH=288000;            
hls_variant _360 BANDWIDTH=448000;
hls_variant _480 BANDWIDTH=1152000;
hls_variant _720  BANDWIDTH=2048000;
hls_variant _1080 BANDWIDTH=4096000; 
}