As I can understand from your response that there is some issue in integrating Secne 7 with AEM 6.1. So can wee use the default cq5 renditions for video assets instead of S7? What does Adobe recommends in this regards?

I have copied the ffmpeg in <CQ>\app\bin\ffmpeg.exe but still getting the error

I have followed the steps given in document https://docs.adobe.com/docs/en/aem/6-1/administer/content/assets/video-transcoder.htmlAfter uploading the video its giving following error. java.io.IOException: Cannot run program "\app\bin\ffmpeg"error.log is attached.