We have always found uploading our music videos to Youtube works best with rendering to mp4 in Sony Vegas using the Main Concept AVC/AAC.
But something has gone wrong with our latest one, when we render to mp4 we get a strange phasing effect on the guitars. We've checked there are no effects on the audio track in Vegas & there is only the one audio track on the timeline.
If we render to avi or wmv the audio is fine but unfortunately the video is not so good & when we upload in wmv to YouTube the audio/video are out of sync.
So we would really like to stick to mp4!
The song is a wave file as its put into Vegas & we can see its being converted to something called aac when its rendered.
Please does anyone have any tips how we can change the settings or something to get rid of this phasing effect?