[MPlayer-advusers] [BUG] -sws 10 -vf screenshot leads to hang up

[Andrew Savchenko]

Hi,

On Sunday 28 September 2008 15:43, Andrew Savchenko wrote:
> Hello, all,
>
> With revision 27668 and some earlier ones (haven't perform
> regression search yet) mplayer hangs when playing certain types
> of video if -sws 10 and -vf screenshot options are used
> together. This happens only with some video files, regardless to
> their codec type.

According to regression test the reason is r27612:
------------------------------------------------------------------------
r27612 | michael | 2008-09-15 07:33:09 +0400 (Пнд, 15 Сен 2008) | 2 
lines

Avoid using floating point for calculating filter coefficients.

------------------------------------------------------------------------

FP dropping leads to precision loss and to eternal recursion in 
swscale.c: getSplineCoeff(). Values of b,c,d variables are changed 
for the file in question, leading to singularity series an NAN 
values (log is too long to post here and is easily reproducible).

Perhaps, it is reasonable to revert 27612, 'cause it broke things 
down.

With best regards,
Andrew
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