mpeg2 export - sound problem
by Karmen
on
Oct 9, 2007 at 9:29:05 am
hello i have a serious problem concidering exporting mpeg2 files, problem is that it makes sound peaks too high which leads to distortion, if i export only waw the peaks stay the same as on time line, and if i play the clip on time line it souds ok as well as it looks ok on waweform, but if i drag the slider up and down the clip the distortion can be seen (it does not occour on my other simmilar workstations)
i have 3 velocity work stations with the same configuration and i am using the same project on all of them, and i have a problem with only on one, if somebody had similar problem and knows a solution please answer to this post.
i would realy apriciate it
Re: mpeg2 export - sound problem by Peter Knijn on May 29, 2008 at 10:56:52 am
In your velcoity preferences (nto your output prefs), there's a slider that boosts audio in exporting digital files. You can slide that down or turn it off to get better results. Sometimes (especially in WMV) you NEED this boost though, so that's why it's even there.
Re: mpeg2 export - sound problem by Chris Blair on May 30, 2008 at 2:00:01 am
If you have Velocity systems, 6dB is about as high a boost as you want. On VelocityQ, 4dB is as high as you want to go. There are some differences in the audio hardware and drivers on Velocity and VelocityQ systems that account for the difference. It can even be different among the versions of software. For instance, on VelocityQ, version 8.2 is VERY different from version 9.1. They made major changes in how the software handles audio in version 9...so the boost may even be different in terms of how high to go with it.
Another question is...where are you hearing the distortion? Through playback on your PC? Playback on a DVD once the MPG2 files has been authored? If you're playing the mpg file back on your PC, you could have your windows sound master level turned all the way up in the sound settings and in the windows media player itself. That can also make a perfectly good sound file sound distorted.
Hope that helps
Chris Blair
Magnetic Image, Inc.
Evansville, IN
www.videomi.com
