Mark Schonewille wrote:
On my very old PC, I only got sound, no picture. After doing several
tests, some of which in Windows Media Payer, I was eventually able to
play WMV files that I couldn't play before.
I am not sure that the problem is caused by Revolution. It might be
Media Player, Windows or my graphics cards.
In the "Read Me" that used to accompany the old MetaCard installation,
Scott Raney wrote:
MetaCard is very good at exposing bugs in the drivers for
graphics cards. These problems seem to be most frequent
in Windows 98, but can plague any Windows system. The most
common symptom are images or cursors that draw in the wrong
colors or with the mask and data reversed, and bits of
windows left on the screen when they are closed or moved.
Be sure you have the latest drivers from the vendor of your
graphics card. If the problem still exists with those, try
turning acceleration to its lowest level. If that doesn't
fix the problem (or even if it does), please report this
bug to the vendor of your graphics card.
When I first read that opening line I thought, "What an arrogant SOB,
since my customers are reporting that all of their other apps work fine
but the one I built with MetaCard!"
But in working through these issues with my customers, I found that
"everything else works fine" usually means the only other apps they're
using are Microsoft apps, and for years the APIs MS used internally were
not always the ones they publish for other developers so they don't make
a good comparison.
But moreover, I found that when I was able to get the customers to
update to the latest drivers for their video card, in 99% of the cases
the issue went away.
So in the end I have to admit that Dr. Raney was right: the engine is
indeed very good at exposing bugs in the drivers for graphics cards. :)
That's not always the answer, but updating drivers to the latest
versions will at least rule out the possibility, allowing you to
investigate other options with greater confidence.
--
Richard Gaskin
Managing Editor, revJournal
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