NextPreviousHomeMovie export only showing top half of frame

kenm | 15 years ago | 4 comments | 2,944 views

I'm trying to export a 1920x1080 show, and no matter whether I choose AVI uncompressed or compressed, or image sequence, the resulting files only show the top half of the title, and the bottom half is all black.




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I have the same problem with some resolutions if i select 'super high quality' in the 'antialiasing quality' export options (ATI Radeon HD3800).

vincent, 15 years ago


Your graphics card is running out of video memory and fails to communicate this to BT.

An in depth discussion about this issue, including solutions, can be found here:

outerspace-software.com...

michiel, 15 years ago


Not likely. The graphics card has 512MB of RAM and it's doing no other job at the time. (ATI HD3870).

This is definitely a problem with BT that needs to be addressed.

kenm, 15 years ago

Antialiasing is performed by supersampling: in super high quality mode, BluffTitler renders the scene 4 times bigger and scales it down with bilinear filtering.

4 times bigger both horizontally and vertically means 4 x 4 = 16 times as many pixels. With 8 bytes per pixel (red, green, blue, alpha, depth and stencil) this requires the enormous amount of:

(1920 x 1080 x 16 x 8) / (1024 x 1024) = 253 MB

This comes on top of all the video memory already in use by BluffTitler (textures, front and backbuffer), Windows and other applications running, so chances are high that it won't fit. In that case BluffTitler automatically switches to a lower antialiasing quality.

The problem is that some video drivers happily claim that they have such memory available, when in fact they don't. This is obviously a bug that should be fixed. The only result of such a fix however would be that BluffTitler automatically switches to a lower antialiasing quality.

This is an action you can perform yourself, manually, by choosing high, medium or low quality. It would indeed be very convenient if this could be done automatically, but I want to stress the fact that it would NOT make any difference to the final result: the antialiasing quality of the exported picture and movie file would be exactly the same.

michiel, 15 years ago


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