Re: [Swftools-common] data loss in jpeg2swf

[Andrew Wheatley]

Thanks Matthias.  That's helpful.

--------------------------
Andrew Wheatley
Director of Special Projects
Demologic: An Idologic Incorporated Company
http://www.demologic.com/index.html
1-866-DO-LOGIC (1-866-365-6442) ext. 101
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On Tue, 21 Sep 2004, Matthias Kramm wrote:

> On Mon, Sep 20, 2004 at 04:01:59PM -0400, Andrew Wheatley wrote:
> > How do I prevent data from being lost when I convert a jpeg
> > to a swf using jpeg2swf.  I've used -q 100 but I still lose
> > data.  When I extract the jpeg from the swf using swfextract
> > the extracted jpeg is slightly different than the original jpeg.
>
> jpeg2swf first decompresses the jpeg, then compresses it again
> using the SWF version of the jpeg standard.
> As jpeg is a lossy format, you will lose some information on the
> way, yes.
> Notice btw. that in the opposite direction, this is not the case:
> A jpeg extracted out of a SWF by swfextract is exactly the same
> as it was in the SWF.
> Not sure whether there's a way to do a version of jpeg2swf which
> works similar, i.e., doesn't have data loss. If yes, it would
> only work for specific types of JPEGs.
>
> Greetings
>
> Matthias
>
>
>
>