Hello Derek,

--- Derek McTavish Mounce <[EMAIL PROTECTED]> wrote:

> Welcome to Cinelerra. :)  It provides a fascinating and ultimately
> very
> productive way of working when you get used to its quirks, so stick
> with
> it!

Yes, it is a fascinating piece of art. I agree. I must confess that
I tried to use it about 0.5 years ago but could only load a file...
About a month ago I repeated the attempt to learn the system and
mode some interesting (to me) things with it. Of course, I do not
have any education in film-making, I am just recording my child on
a digital camera and want to save them to DVDs (for a lack of better
storage ideas)

By the way, a side note. To much shock, the camera which I bought
produces interlaced mpeg movies. So it is a telecamera. For academic
purposes are there any consumer-level digital progressive-scan cameras?
Or interlacing is better ??? I know interlacing is cheaper :)

Anyway, back to my cow, so to speak...

> Yeah, the whole fields/NTSC/Ahhh! thing can be quite maddening. 
> Usually
> you have to spend a day or two just rendering out simple tests to
> figure
> out exactly how to manipulate them in a new program.

Unfortunately I have to make a disk and try it in a stand-alone dvd
player to discover these problems. Software player (xine and mplayer)
do not have any problems with the field order. Are there any software
tools which would allow to test compatibility with hardware players?
(Or my player is simply junky?)

> For your specific problem, I'd recommend de-interlacing (try the
> Deinterlace filter, and also the Frames to Fields to see what looks
> best
> on your footage), then applying any other effects.  That's the rule
> anyway; de-interlace if you apply any "pixel-shifting" effects.  If
> the
> de-interlace filter and the whirl don't behave well together, just
> render
> out the de-interlaced section and import it back in place.

Yes, I saw a deinterlacing filter, but I was under the impression that
it is not needed. If I look in composer, then I do not see any
interlacing effects as if the video was deinterlaced. (Or it is
deinterlaced for display purposes only). I set YUV 8-bit in the 
format settings (I do not know if it has any connection to the
interlacing) What I can add that, if the output is not piped to 
mpeg2enc, I do not see any interlacing effects in xine. If the
video is piped through the mpeg encoder, than xine shows interlacing
and I have to deinterlace during the play. 

> 
> I've heard that Cinelerra doesn't deal particularly well with
> progressive
> and interlaced footage in the same timeline, so you might have to end
> up
> de-interlacing all of your footage.  Don't know for sure.

I think I will use this route.


For documentation purposes, I would add that the whirl problem
occurs with large radii and large rotation angles when top_field
first is used. In non-interlaced or bottom_field first, this does not 
happen.

> 
> Let me know if I've missed a part of your question. :)
> 
> 
> -=Derek
> 
> 
> > Hello everybody,
> >
> > I am just discovering cinelerra and made my first DVD.
> >
> > To my shock, at the end of the process I discovered that I used
> > "bottom field first" which is not very good for NTSC standard.
> > Likely I have saved the xml files of all the steps so simply
> > re-running all of them with the field order changed should not
> > be very hard. Unfortunatelly, I have discovered that the whirl
> > video effect does not work well with the top field order. It
> producess
> > a black "wave" at the bottom of the screen if large whirl angles
> are
> > used. I do not quite understand the possible connection between
> > the effect and the field order, but maybe it is fixable somehow...
> >
> > Any suggestions?
> >
> > Thanks
> >
> > ZF
> >
> >
> >
> >
>
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> >
> > _______________________________________________
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> >
> 
> 
> 
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> 



       
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