[FFmpeg-user] slice and enabling slicecrc in FFv1

[Dinah Handel]

Thank you for looking into that, Michael. I tested the patch and it is
working now. Thanks!

all best

On Fri, Sep 25, 2015 at 11:11 AM, Michael Niedermayer <michaelni at gmx.at>
wrote:

> On Thu, Sep 24, 2015 at 02:20:28PM -0400, Dinah Handel wrote:
> > Dear FFmpeg-users,
> >
> > I’m currently testing different specifications of FFv1: enabling each
> slice
> > options, and enabling and disabling slicecrc. The purpose of these tests
> is
> > to see whether or not enabling these options makes a significant
> difference
> > in processing times or the resilience of the resulting files for
> long-term
> > storage. However, in running these tests, it seems that the error
> > concealment used when slicecrc is enabled on a damaged slice is not
> working
> > as intended.
> >
> > We conducted tests where the asset had every possible slice option (4, 6,
> > 9, 12, 16, 24, 30) and slicecrc enabled and disabled. We then
> intentionally
> > created errors using zuff.
> >
> > We analyzed at the results using the tblend filter (which makes it easier
> > to see when a slice uses error concealment since the difference within
> the
> > slice from one frame to the next will be null) and found the following
> > results:
>
> should be fixed
>
> thanks
>
> [...]
> --
> Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
>
> The bravest are surely those who have the clearest vision
> of what is before them, glory and danger alike, and yet
> notwithstanding go out to meet it. -- Thucydides
>
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>


-- 
Dinah Handel, MLIS | NDSR-NY @ CUNY TV
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