(Audio and video study notes): ffmpeg pulls and pushes

• [Description] Course learning address: https://ke.qq.com/course/468797

ffmpeg pull stream

[Live streaming]

• Use ffplay to test whether the current code stream can be played normally

ffplay rtmp://server/live/streamName

• -c is the same as -codec

ffmpeg -i rtmp://server/live/streamName -c copy dump.flv

• For protocols other than rtmp, -c copy should be used with caution, such as the http protocol.
• Example: CCTV1 HD: http://ivi.bupt.edu.cn/hls/cctv1hd.m3u8
  • -c copy output is specified in ts format, and flv format is used to report an error

ffmpeg -i http://ivi.bupt.edu.cn/hls/cctv1hd.m3u8 -c copy cctv1.ts

• Do not use -c copy, the output is in flv format, audio and video are automatically transcoded

ffmpeg -i http://ivi.bupt.edu.cn/hls/cctv1hd.m3u8 cctv1.flv

• Use specified transcoding when outputting

ffmpeg -i http://ivi.bupt.edu.cn/hls/cctv1hd.m3u8 -acodec aac -vcodec libx264 cctv1-2.flv

ffmpeg push stream

[Live streaming]

ffmpeg -re -i out.mp4  -c  copy flv rtmp://server/live/streamName

• -re, means to read the file according to the timestamp
• Reference: Nginx builds rtmp streaming media server (Ubuntu 16.04)
  • https://www.jianshu.com/p/16741e363a77
• More advanced settings reference
  • http://blog.csdn.net/kingroc/article/details/50839994