Comments

SonyEPM wrote on 2/21/2001, 3:49 PM
If the pre-render settings are different than the final
render settings, everything will have to be re-rendered.

If you are going back out to NTSC DV (for example), pre-
render to NTSC DV, and those sections will simply get
copied into the final rendered file, no recompression.
Leonard wrote on 2/21/2001, 9:55 PM
The purpose of pre-rendering, if I it understand correctly,
is to allow a smoother preview of sections of your project
that have lots of effects applied. These "pre-rendered"
files are not used in the final render.
SonyEPM wrote on 2/22/2001, 9:09 AM
The main purpose is to smooth out fx-intensive sections for
previewing.

Pre-renders are used in the final render if they match the
final render output settings exactly.
colemanr7 wrote on 2/22/2001, 12:51 PM
I selected "NTSC DV" during pre-render and "NTSC DV"
during "render as". Settings appeared to all be identical,
but maybe there's something I'm missing because the pre-
rendered sections are always re-rendered.

Along a similar vain, regardless of how I set the project
settings under "File->Settings", selecting "File->Render
as" defaults the template to "Project Default
(uncompressed)" and I have to manually select "DV NTSC"
everytime. Have I possibly not set the project settings
correctly?

Thank you.
Bobby
SonyEPM wrote on 2/22/2001, 1:11 PM
When VF renders a DV project that has DV pre-renders, the
pre-renders get copied straight across into a new master DV
file. The quality of the pre-renders stay the same because
we don't recompress, but we do copy the bits into the new
final rendered file. Perhaps that is what you are seeing.

Stick with the unmodified NTSC DV template- that's all you
need for DV.

Also, render templates are "sticky"- the last one you used
gets called up next time you render (as long as the file
finished rendering. If you cancel it doesn't do this)
colemanr7 wrote on 2/22/2001, 10:25 PM
You are correct about me stopping the render. I have never
let it finish during my test runs.

I'll experiment some more with the pre-render issue. As it
stands now, when the render gets to the pre-rendered
section it slows way down and appears to go at the same
speed as the pre-render--thus seeming to indicate that a
complete re-render is underway. I trust that the software
will use pre-rendered files when possible, but I need to
play with it some more to see what I have set wrong and fix
it.

Thank you.
Leonard wrote on 2/22/2001, 11:02 PM
Does the same hold true for projects rendered from clips
captured with analog cards like the DC-10 or just DV cards?
I've spent the last 3 hours testing, testing and testing,
making sure pre-render and final render settings matched
EXACTLY, and never once did it use any pre-render files in
the final render. It always renders everything. Have I
overlooked something?
SonyEPM wrote on 2/23/2001, 9:42 AM
It works for non-temporally compressed codecs only. I'm not
sure what codec you are using, but if you use Cinepak or
MPEG for pre-renders (two examples)we'll need to recompress
those.

We'll try to get this into Vegas 3, but its a tricky issue.

Leonard wrote on 2/23/2001, 2:34 PM
I'm using the mjpeg codec that came with my DC-10 card.
And, I also tried the mjpeg codec from Morgan Multimedia.
The DC-10 mjpeg is a hardware codec, and the Morgan is a
software codec.
SonyEPM wrote on 2/23/2001, 3:47 PM
We don't officially support the DC10. It is possible that
you can get it to work at an acceptable level, but we can't
make any performance guarantees.
colemanr7 wrote on 2/26/2001, 9:51 AM
Ok... I did a very simple test. Placed a single image file
(photo) onto the video track. No audio. Pre-rendered the
clip to NTSC DV then selected "Render as" to create a final
file. Selected NTSC DV as the format. Final render time
was identical to the pre-render time.

Any suggestions for a setting somewhere?