On Tue, Apr 13, 2004 at 11:51:47AM +0200, Bernhard Praschinger wrote:
> Hallo
> 
> > Does anybody here know about ksvcd? I have been encoding
> > some svcds with the help of transcode and mjpegtools.
> A SVCD with the kvcd quantisation matrix ?
> 
> > But now I would like to try ksvcd. For what I have read
> > at the kvcd home page (www.kvcd.org), the only things that
> > would change from svcd is the matrix used my mpeg2enc
> > (option "-K kvcd" of mpeg2enc) and the resolution (528x480
> > instead of 640x480 for NTSC).
> Why do you want to change the resolution ?
> The default SVCD resolution is 480x480.

That is, the SVCD resolution is 480x480 with an aspect ratio
with 4:3, which gives a final 640x480 resolution
when playing back the movie.

> You can use any resolution your player accepts, but useing the default
> resolution with cause less problems. 

Now I want to transcode an AVI movie which has a somewhat
lower resolution than the 480x480 default SVCD resolution.
It is 384:208 and its playing time is 2:48:26.981.
Do you think that if I add top and bottom black borders
of size 40 each (bringing the movie to 384x288, which
would fit well on the TV screen, keeping the aspect 4:3)
and then transcode it (the aspect ratio in the resulting
MPEG2 being set to 1:1), I would get a resulting movie
with better quality than making a standard SVCD (with
the 480:480 @ 4:3 standard resolution)?

> > I am in doubt about the aspect ratio. For svcd, after
> > adding any needed black borders, I resize to 480x480 and
> > use an aspect ratio of 4:3 (given 640x480). What should
> > I use for ksvcd?
> If you want that the SVCD works on many players use the default (480)
> size. 

I want that the SVCD work on my player primarily.
Sometimes I make them non-standard in order to get better
quality and/or fit more of the movie on one cd. Basically
I encode at a higher bitrate (2800 kbit/s, for instance).

Regards,

Romildo


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