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I noticed the following quote in your question:
" For some reason (i must have crossed a tipping point) the little i added today has made it extremely unstable"
I've had similar problems with a project (standard defintion however) if one of the added clips is somehow corrupt. Have you tried removing that 'new' clip you just added? That or one of the other clips may be the source of the trouble. By eliminating it,the problem may be solved.
Thanks for the reply, definitely a good idea, but I tried. I was able to render all those clips separately in a small project.
I think PE holds a lot of stuff in RAM, and when you add the last straw that breaks the camel's back, PE becomes unstable. (PE also has a memory leak problem.) It's the number of items that is significant. I have problems with more than say 700 clips on the timeline. It pays to work in small sub-projects if you want to avoid saving after every edit which I resort to sometimes.
In large projects, scrolling the media panel contents or using the text editor for subtitles are the two things almost guaranteed to crash the programme, so make sure you save before doing either.
Thanks for the response. I am trying to save sections off into smaller projects, but even that is proving difficult. Now when I try to render as AVI, DV AVI, uncompressed AVI, MPEG, or Quicktime I get white flickering throughout the resulting video, have you ever seen that before? If not I may post as a separate question as I want to get a possible answer for this, it seems to be getting worse every day :(
Thanks for your help,
Do you have the latest version of Quicktime installed? Also the latest version of your graphics card's firmware? (Get it from the card's manufacturer's site; not Windows Update.)
UPDATE: Through some experiments I think it is due to having the effect on two tracks at the same time. I can resolve that. I am going to try and break my project up into multiple projects and see if I can get it rendered.
Thanks for the reply, I do have the latest quicktime, will check graphics card but think i do.
Just did some tests and realized that it is the 'shadows/highlight' effect that is causing the flickering. when I disable that effect it renders correctly.
I use that effect extensively to fix lighting and always turn off the auto setting and set it myself. But even with manual settings there is significant flicker (even a lot more than when I use the auto setting). Any thoughts on that? I have been using it since the beginning with no problem and now all of a sudden it renders the effect with extreme flickering.
Any help would be appreciated.
>it is the 'shadows/highlight' effect that is causing the flickering
Go to the properties of the effect, click on more options, and set the black clip level to zero. (Set the white clip too if you like.) I find flickering is worse if the clip does not have a high dynamic range, but is merely under exposed.
Its very tedious to have to change this setting from the default everytime, but I find several of PEs defaults to be non-optimal.
(Tip courtesy of Robert J Johnston).