Re: Bug I found in the screen codec!

On Thu, 16 Feb 2006 18:18:27 -0800, Brett Halsey
<BrettHalsey@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

hmm I know the files I captured using screen capture codec 9 again going with
yes even #'s higher then 960 I got the blur.
Are you sure you are in 32 bit mode?
also you have to make sure that the encoder is closed.

Encoder is on a different machine to the one used for playback :

32 bit display depth set on playback PC
24 bit display depth set on encoding P.

Is this the difference you're suspecting ?

I can post the clips I made and also take screen grabs (to show you what I'm
seeing). I have tested it on 4 machines I have all on xp and also with both
wmp 9 amd 10. I get the same results.

I will post the files tomorrow.

"Neil Smith [MVP Digital Media]" wrote:

On Thu, 16 Feb 2006 06:25:27 -0800, Brett Halsey
<BrettHalsey@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

Nope, cannot replicate. I did one capture at 960x600, 500kbps and a
second at 964x600 500kbps with otherwise the same settings. Captured
content was a mixture of iTunes, swapping groups and opening message
threads in a news reader, and scrolling a yahoo web page.

Both created files were made at an average of 491kbps and were
qualitatively identical in appearance on WMP10 on both overlay and
high quality settings.

I then ran the playback test in WMP9 on Win2000 on the same hardware
(which has no "high quality" setting) to compare results, and was
again able to determine no difference in quality between the two
capture sizes, with overlays on or off.


Although the video looked significantly more blurred when using
overlays and ~WMV9 standard codec~ on playback in WMP10 compared to
using high quality mode, there was no qualitative difference between
the ~two clips~ (when viewed at 100% resolution, no resize to fit etc)
when these settings remained the same.

I can post the test files created, and the encoder profiles used at
some point if it would help (site tool currently needs an update ;-)

My conclusion would have to be your settings aren't what you think
they are. PS How exactly did you do a capture at 965 pixels ?

You must have had an odd-numbered horizontal offset, because the
encoder (codec) *requires* that you have an even number of pixels.
You'd see an error about "the specified stream does not exist"
(0xC00D003C) otherwise.

Cheers - Neil

100% positive

Give it a try.
you just have to make sure that you are @ 32 bit and that you have the
defualt settings on teh WMP. Do a capture @ 961 x anything and take a look.
Then do a capture @ 960. Huge difference.



"Neil Smith [MVP Digital Media]" wrote:

On Wed, 15 Feb 2006 12:39:29 -0800, Brett Halsey <Brett
Halsey@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

Is this the screen codec you are using?

If so I found a bug....well @ least I call it a bug.

If you record anything higher then 960 width with the screen capture 7 or 9
codec it looks very blurry in 32 bit mode or with the overlay turned on in
windows media player.

You're sure it's not a reflection of the available player display
width ? The player will have to re-scale the clip width if the encoded
screen capture clip is wider (or higher) than the player's video
display area. That would replicate your symptoms.

Cheers - Neil


.

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