[directfb-dev] Re: Analysing judder with mplayer on matroxg400 with crtc2

["Brian J. Murrell" <brian@interlinx.bc.ca>]

On Tue, 2004-01-13 at 19:18, Rob Shortt wrote:
> Brian, I've applied your patches.  Here's what I get on the G400, just 
> like you did:
> 
> bad field: 1
> waiting for irq
> bad field: 1  0.4 A-V:  0.183 ct:  0.007    3/  3   0%  0%  0.0% 1 0 0%
> waiting for irq
> bad field: 1  0.4 A-V:  0.161 ct:  0.013    5/  5   0%  0%  0.0% 1 0 0%
> waiting for irq

OK.  But at least yours is consistently bad.  That points to something
other than my issue.

A couple of things.  First of all, I find the results to be more
informative if you wait for the decoder to sync and settle down.  I have
noticed that MPlayer has a bit of a "startup" with it in which it drops
frames, presumably to get A/V sync.

Try waiting about 10 seconds before looking at the output.

Second, redirect mplayer's output through a "2>&1 | tr '\r' '\n'" to get
each mplayer status line on a separte line of output.

Notice how you are waiting for an irq on every frame.  That is what I
would expect to see with a machine that enough steam to properly decode
and display the stream.

b.

-- 
My other computer is your Microsoft Windows server.

Brian J. Murrell

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