ffmpeg hls 2~3秒 rtmp
．2秒 ffmpeg -i rtmp://xxx/live/A1 -tune zerolatency -preset faster -vcodec libx264 -b:v 400k -s 720x450 -r 15 -acodec mp3 -g 2 -f ssegment -segment_format mpegts -segment_time 2 -segment_list playlist.m3u8 out%03d.ts -r 15 帧速率 -s 720x450 分辨率 -b 500k 比特率 -gop 2 -segment_time 2 压缩快慢 -preset ultrafast,superfast, veryfast, faster, fast, medium, slow, slower, veryslow ．3秒 ffmpeg -i rtmp://xxxx/live/A1 -tune zerolatency -preset faster -vcodec libx264 -b:v 400k -s 720x450 -r 15 -acodec mp3 -g 1.5 -f hls -hls_list_size 2 -hls_time 1.5 -hls_wrap 4 playlist.m3u8 ...