Toby,
I've gotten rendering crashes if I have a gap between two adjacent clips
on the timeline. To stop the gaps from happening, I will go to the end
of a particular segment, zoom in as far as I can go, and make sure that
the audio and video tracks end at the exact same time.  

Another way of saying this is that the end of one clip and the start of
the next should line up perfectly on the timeline. If they don't end at
the exact same time, I clip off a bit of whatever track is dangling by
using the mark in/mark out indicators and doing a "cut". I can then be
assured that when I paste a new segment to the end of this recently
snipped one that the segments will align perfectly. Once the segments
are aligned, I then apply the transition and feel secure that the video
will render properly.

scott

ps - it also helps if you have Settings->"Align cursor on frames" option
selected so that you always have measurable reference points to do your
cut and pastes.

On Mon, 2006-12-04 at 12:24 +0100, Toby wrote:
> Hi,
> 
> yesterday I worked on some DVD menus, where I placed  6 video tracks
> with DVD-MPEG2
> footage (arrangement of animated previews) on top of an animated background.
> Except for some resource shortage there's no problem with playback, etc.
> 
> But when it comes to rendering, it only worked sporadically for some of
> my compositions.
> Most of the time cinelerra hangs or crashes during rendering regardless
> which output format I chose.
> Looking at the projects that worked and the ones which didn't doesn't
> show any obvious difference.
> Exactly the same arrangements, where I just swaped all the source material.
> First, I thought the problem is related to a certain track or source
> footage, but disabling an arbitrary track
> helps most of the time.
> 
> Now, is there a limit in video tracks that can be used for compositions
> in parallel ?
> (I'm talking about 2 full-size background tracks and 6 partial preview
> areas visible at the same time)
> 
> Are there known problems with MPEG2 source footage ?
> Any other ideas ?
> 
> Would it be worth analyzing the XML project files for some "irregular"
> stuff?
> 
> By the way, I'm talking about the latest debian packages as well as an
> up-to-date SVN build
> as of 3/12/06. No matter whether utilizing OpenGL or not.
> 
> Toby
> 
> 
> 
> 
> _______________________________________________
> Cinelerra mailing list
> [email protected]
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