本文讨论了在nginx+rtmp模块中，由于子进程管理不当导致的频繁deleteStream问题，即客户端未断开连接时，服务器内部错误地断开了流。这种情况会导致ffmpeg进程成为孤儿并持续到输入数据超时。解决方法是在bash中创建一个exec包装器，通过信号陷阱来处理SIGTERM，确保ffmpeg进程在接收到nginx-rtmp的kill信号时能正确终止。
当客户端未断开连接，内部却频繁断掉，频繁deleteStream and createStream
createStream, client: 127.0.0.1, server: 0.0.0.0:1935
2015/12/30 11:48:01 [info] 14#0: *8 play: 。。。client: 127.0.0.1, server: 0.0.0.0:1935
2015/12/30 11:48:09 [info] 14#0: *8 deleteStream, client: 127.0.0.1, server: 0.0.0.0:1935
2015/12/30 11:48:09 [info] 14#0: *8 recv() failed (104: Connection reset by peer), client: 127.0.0.1, server: 0.0.0.0:1935
2015/12/30 11:48:09 [info] 14#0: *8 disconnect, client: 127.0.0.1, server: 0.0.0.0:1935
2015/12/30 11:48:09 [info] 14#0: *8 deleteStream, client: 127.0.0.1, server: 0.0.0.0:1935
2015/12/30 11:48:09 [info] 14#0: *1 exec: child 152 exited; ignoring, client: 。。。客户端IP, server: 0.0.0.0:1935
2015/12/30 11:48:09 [notice] 14#0: signal 17 (SIGCHLD) received
2015/12/30 11:48:09 [notice] 14#0: signal 17 (SIGCHLD) received
2015/12/30 11:48:09 [notice] 14#0: unknown process 152 exited with code 1
2015/12/30 11:48:09 [notice] 14#0: unknown process 152 exited with code 1
2015/12/30 11:48:09 [info] 14#0: *1 exec: terminating child 152, client: 。。。 server: 0.0.0.0:1935
2015/12/30 11:48:14 [info] 14#0: *1 exec: starting managed child '执行脚本', client: 。。。, server: 0.0.0.0:1935
解决办法
https://github.com/arut/nginx-rtmp-module/wiki/Exec-wrapper-in-bash
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