POV-Ray : Newsgroups : povray.animations : Replaced animation with lower res. : Re: Replaced animation with lower res. Server Time
23 Jun 2021 05:48:01 EDT (-0400)
  Re: Replaced animation with lower res.  
From: Chuck
Date: 7 Jul 2018 12:00:00
Message: <web.5b40e2bf5350669b7b1d72590@news.povray.org>
dick balaska <dic### [at] buckosoftcom> wrote:
> On 07/07/2018 12:10 AM, Kenneth wrote:
> >>
> >
> > How did you find that info? In Firefox, I have an add-on called VideoConverter,
> > but the only things it shows are the various 'streaming' bitrates, not the file
> > size(s). (And in this case, VC can't download it as a 'file', as far as I can
> > tell.)
> View source, line 33 gives you the video url. [1]
> I downloaded the 640x360 edition.  It is 2.9 MB which seems about right.
> > If the 1920 X 1080 video is indeed only 60+ KB in size, that's...
> > extraordinary!! (I have my doubts-- but if true, maybe it's because the video
> > frames show mostly a pure black background, which is easy to encode.)
> >
> > In another post, Chuck mentioned that the video was saved as an .avi file; in
> > your own data above, the Video Codec seems to be avc1. That would be a
> > variant(?) of h.264 I believe (or maybe the same thing?) I wonder if
> > avc1-encoded video-- but wrapped in an old-style.avi container-- might be a bad
> > mix? Just a conjecture-- I'm thinking about the choppiness.
> mediainfo says it was encoded with Lavf57.71.100 which is part of
> ffmpeg.  It was likely transcoded when he uploaded it.
> >
> >
> >
> [1] On my video page, I scrambled the url just to keep the stupid robots
> at bay.
> --
> dik
> Rendered 328976 of 330000 (99%)

Don't know if it is good practice but, if possible, I want to maintain all of
the information present in the original rendered frames. The originals as
produced by PovRay are PNGs. Then since I use VirtualDub to produce an
uncompressed AVI from the frame sequence I assume that all of the original bits
are still present (at the cost of a huge file).

Now I use ProShow to load in the AVI file and to add music and perhaps an
introductory black slide. Then there are many output options: BlueRay, DVD,
AVCHD, MPEG-4 (1080p (full HD), 4K UHD, and others.

There is another box that can be checked that selects either 30fps normal, high,
or extreme quality. The normal quality is checked. Extreme quality doubles or
triples the size of the output file.

SmugMug then re-encodes the file for presentation so I don't know if selecting
normal quality really does any good.

There were 1268 original frames produced. VLC shows the length of the animation
to be 2:06 minutes which at 30 FPS could use unique 3780 frames. I recall that
VirtualDub created the AVI at 10 FPS so the math seems to match up.

An interestine experiment would be to render 3780 frames and have VirtualDub
create an AVI to run at 30 FPS.

If reading between the lines above leads you to the conclusion that I am a
neophyte to video you would be correct.

I set the options on SmugMug to limit the res of the download to try to keep
pilfering down but if it is useful I could check into creating another gallery
and allow a download of the "fullm as created mp4 file".


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