ffmpeg -i 'rtmp://127.0.0.1/live?B1wrZUZQc' -i 'http://120.24.252.95:8080/live/livestream.flv' -filter_complex overlay -c:v libx264 -r 30 -preset ultrafast -tune zerolatency -crf 25 -pix_fmt yuv420p -f flv "rtmp://rtmp.rtc.qq.com/push/22s1111ss?sdkappid=1400653314&userid=007E83817D55C01F&usersig=eJw1jsEKgkAURf9l1iFvnHF8CK3UaBFUaGFLYUZ5ijLaoEH074nW8p7Dgftm*SnzzMvSaFikQCLAbmWTGVnEfA-Ytp*6La0lzSIuAVQgBJebIW16RxWtAUCYokAeJkEQAz-8a6oXWVzaeh6HfO6mFl2ZNnOvlZvO13CQVWl4o*OuuD9Udrztf6GjbjnGlUQlBaL-*QLFzTO7"