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List:       mjpeg-users
Subject:    Re: [Mjpeg-users] y4mstabilizer problem (solved)
From:       Marko Cebokli <s57uuu () hamradio ! si>
Date:       2009-01-24 18:34:41
Message-ID: 200901241934.41745.s57uuu () hamradio ! si
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It works OK now on the offending system, for both 4:4:4 and 4:2:0.
(I downloaded only the y4mstablizer.c from cvs, other stuff same as before)

Thanks!

Marko Cebokli


On Saturday 24 January 2009 19:12, Steven M. Schultz wrote:
> On Sat, 24 Jan 2009, Marko Cebokli wrote:
> > I managed to compile the y4mscaler.c that was attached to a previous
> > message of another thread (10 min ago).
>
> 	Good!  Maybe in the future there will be either a 0.91 version of
> 	y4mscaler or the program will be integrated into mjpegtools.
>
> > But when I try y4mstabilizer with it and 4:4:4 (using the exact y4mscaler
> > options from the y4mstabilizer help) , I get exactly the same problem,
> > brief flash of first frame and then a green frame that floats away....
>
> 	Oh, ok - I misunderstood the problem.  I thought the entire frame
> 	turned green.  Anyhow, that 'green' is 0/0/0 in YUV so something is
> 	zero filling a buffer.
>
> 	Since there are only 3 uses of bcopy it was not too much effort to
> 	change them to use memmove.  I used memmove instead of memcpy because
> 	the manpages state that memmove correctly handles overlapping copies
> 	while memcpy does not.  BSD versions of bcopy also handle overlapping
> 	buffers correctly but perhaps other systems do not.
>
> 	Since the problem doesn't happen on my system I can't test the change.
>
> 	Try the CVS version of mjegtools and see if the problem goes away. If
> 	it does then the released packages can be updated.
>
> 	Cheers,
> 	Steven Schultz
>
>
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