ffmpeg 降低CPU消耗2

一、利用子码流播放

弘阳60路子码流统计：

    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuv420p(progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 50 tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 90k tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuv420p(progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 50 tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25.08 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 90k tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 640x360, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 704x576, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25.08 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 fps, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 tbr, 90k tbn, 180k tbc
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 352x288, 25 tbr, 90k tbn, 180k tbc

可以看到59路为h264，还有一路密码错误未连接上。

flv.js描述

FLV container with H.264 + AAC / MP3 codec playback

nginx-rtmp-module描述

H264/AAC support

二、优化思路

当CPU使用率达一定比率的时候，使用子码流推流。