NGINX 和 FFMPEG 生成动态自适应流

Question

在这个配置文件https://github.com/TareqAlqutami/rtmp-hls-server/blob/master/conf/nginx.conf#L24-L30

对于每个接收到的 stream，为自适应流转码此单个 ffmpeg 命令接受输入并将源转换为具有不同比特率和质量的 4 个不同流。 # 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

我的启动工作没有错误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; 
        }