Crossfade Audio

richiejazz · Post by **richiejazz** » Wed Nov 29, 2006 4:48 pm

Apologies if my first post has been done before (cant find answer on search).
Does anyone find that the volume envelopes for fading in/out are not that precise or smooth??
More precisely, I am creating music video clips from live footage, with a crossfade from/to black and the beginning and end of the clips. The crossfade is fine, but when I create an audio fade in (or any adjustment to the envelope) when a crossfade is present, a strrange fluctuation in volume occurs when the playback crosses from the transition to the actual clip. Curiously this only happens when I fade in at the start, but not at the end when I fade out. Any Ideas????? This is really annoying!!!

Black Lab · Post by **Black Lab** » Wed Nov 29, 2006 5:00 pm

Does this happen on the finished product, or only in Preview Mode?

Trevor Andrew · Post by **Trevor Andrew** » Wed Nov 29, 2006 5:13 pm

What version of VS are u using

Trevor

Post by **Ken Berry** » Wed Nov 29, 2006 10:59 pm

I only ever had that problem in VS8, and I am pretty sure it was corrected with an update patch (though the update patches for VS8 caused a variety of other problems)... Or maybe it was corrected when I upgraded to VS9...

richiejazz · Post by **richiejazz** » Wed Nov 29, 2006 11:43 pm

I am using VS 10 + and yes its on finished products not just preview.

sjj1805 · Post by **sjj1805** » Thu Nov 30, 2006 3:10 am

I am trying to visualise what you are doing and it appears to be:
Black clip: Crossfade: Music Video : Crossfade : Black clip.

You appear to have a problem in the first part
Black clip: Crossfade : Music Video.

Perhaps one answer may be to do the following:
Before adding the black clips and crossfades either end of the Music video, apply the fade in/fade out and then export that audio as a WAV file.

Now mute the Audio for that Music Video clip, add your Black clips and crossfades, then import the previously exported audio track onto the music track.

richiejazz · Post by **richiejazz** » Thu Nov 30, 2006 5:04 am

Yes SJ. I havnt actually done that yet, but that was my solution to get round the preoblem. Either that or burn the vid without crossfades, import it back in and simply add the black clips either end.
I just wondered if there was a fix for the actuall fault as it clearly shouldnt be happening.
BTW perhaps a silly question, but if I export the video audio as wav. save it then reopen it on the music track as you suggested, would this result in any loss, however small, of audio quality???

sjj1805 · Post by **sjj1805** » Thu Nov 30, 2006 5:12 am

Nothing you would hear, possibly if you examined it with some software.
Consider this.... WAV is an uncompressed format and high quality.
Most users and Holywood Film companies tend to use Dolby.
Dolby is a compressed format and so would have loss of quality - but again nothing your ears would pick up and you would need some software to examine it to 'see' any difference.

In short - I wouldn't worry about it.

Black Lab · Post by **Black Lab** » Thu Nov 30, 2006 2:09 pm

What happens if you just "split" the audio, which mutes your video track and puts the audio in the audio track, where you could apply the fade in/out separate from the crossfade?