Audio dropouts and smart rendering

BrianWesthead · Post by **BrianWesthead** » Mon Sep 26, 2005 8:14 pm

I have just been struggling with a mysterious audio dropout in my output .AVI file and found the clue in http://phpbb.ulead.com.tw/EN/viewtopic.php?t=1189 (thanks!).

Problem was a 10 frame gap in the audio track (I do mean a gap - doesn't look like silence). I'm not doing HD or anything tricky like that - just bog standard 4:3 PAL stuff.

I examined the source project until I went cross-eyed and couldn't see anything wrong - in fact rendering the offending portion always worked fine, but rendering the whole project produced the gap in exactly the same place every time.

The solution was to switch off 'smart rendering' in the AVI output (on Create Video File / Options. From now on it's dumb rendering for me...

Hope this helps someone's eyesight.

Devil · Post by **Devil** » Tue Sep 27, 2005 10:56 am

The problem is not with Smart rendering, it is with a saved preview file. If I were you, I'd keep SR on, until you see a rendering error (it can happen) and only then go into dumb mode. After a re-render of the offending clip, you can go back to SR and continue to save time! Such events are too rare to warrant switching SR off permanently.

BrianWesthead · Post by **BrianWesthead** » Fri Oct 07, 2005 2:57 pm

Thanks for the reply on this - didn't mean to ignore you!

I hear what you say - though I guess my next question would be what is the easiest/most reliable way to cause the rendered preview file to be refreshed? I had already re-rendered the offending portion of the project in the preview window (with no dropouts) but 'create video file' repeatedly gave the dropout. I suppose there must have been a cached version of something hanging around somewhere.

Devil · Post by **Devil** » Fri Oct 07, 2005 3:09 pm

Have you added anything in MP3 format?

BrianWesthead · Post by **BrianWesthead** » Fri Oct 14, 2005 2:17 pm

No MP3 - all audio is either .AVI (some of it split) or .WAV