[MEncoder-users] help with creating avi from jpegs

[Lee Birch]

Hi Joey:

Sorry for the delayed response.  I greatly appreciate your help!

If you are still willing to help...

I went back to my source material and hammered out a better way to create my
individual images.  Now I have pngs of much higher quality to start with.

You asked my target bitrate?  I don't know.  I know bitrate affects file
size - but in my trials I can't seem to pick a number that works better than
any other for quality.

Many of these files will be used by me in presentations directly; others
will be accessed across a slow network.

I tried your command line suggestion:  The quality is good.  Will you still
help me tweak the lavc options?

Thank-you.

--Lee



On 5/3/07, Joey Parrish <joey.parrish at gmail.com> wrote:
>
> On 5/3/07, Lee Birch <birch.lee at gmail.com> wrote:
> > I'm trying to create a movie from a directory full of jpegs.  The jpegs
> are
> > 640X480 and are output from a CAD package (30 frames per second).  They
> look
> > like animation, and have some large areas of solid color.
> >
> > My audience uses Windows Media Player.  I would like a movie that they
> can
> > play without installing additional software/codecs, if possible.  (I
> will
> > entertain all options, though!)
>
> Question:  Will your audience be receiving a presentation by you, or
> will you distribute a video for them to watch on their own?
>
> What is your target bitrate?
>
> Try: mencoder mf://*.jpg -mf fps=30 -ovc lavc -lavcopts
> vcodec=mpeg4:vqscale=2 -o final.avi
>
> If the quality is acceptable, we'll try to tweak lavcopts from there.
> But vqscale=2 should use a constant quantizer and take of lots of
> space.  As I understand it, if that doesn't look good then mpeg4 just
> isn't going to look good for this source.
>
> --Joey
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