Story of hls_fragment Value Not Functioning in nginx-rmtp HLS Delivery Server

• https://github.com/arut/nginx-rtmp-module

• The problem and its cause that occurred when creating an RMTP to HLS streaming server using the nginx-rmtp module.

• Problem

  • In the nginx.conf file, hls_fragment was set to 1s to have each fragment in one-second intervals.
  • However, when checking the .m3u8 file, each duration was around 4 seconds.
  • Changing the value of hls_fragment did not affect the duration.

• Cause

  • When streaming with OBS, the minimum unit of GOP is automatically determined.
  • If it exceeds 1 second, it takes precedence over the value of hls_fragment.
  • The issue can be resolved by manually setting the GOP.