Good morning. I have just rendered a Video in Pro17 and the result was no Audio. I have now lost the Audio in all my MP4 videos on my system. I also use a program call Blufftitler and have tried a MP4 render in that with the same result. Can anybody help or explain whats gone wrong please? I have uploaded the video to YouTube and the audio is fine. Prior to the render all was fine on my system. Cheers John Whew, panic over my video player had got switched to mute, cannot understand what went wrong there!