walter said:
I use Win 7 32 bit on a Compaq computer. The computer came with Win 7 64
bit but I changed over to 32 bit. Everything is working fine, EXCEPT
When I play a video with Windows Media Player, such as the sampler that
comes with Windows 7, the sound is clear but the picture is extremely
dark and not usable. I have to turn up the brightness on my video card
to see anything at all.
So, I installed, VLC video player. Now I get nice, clear pictures but
the sound is so badly distorted that it hurts my ears.
Any ideas what the problem might be?
Thanks
Doesn't it seem odd to you, that the symptoms would be
diametrically opposite ? What are the odds ?
That makes it pretty hard to formulate a theory...
To bugger up a system, one way to do that, is have something
like Adobe Gamma Loader or equivalent loaded. Or, perhaps
keep swapping video cards, without removing the driver first,
until the system is well and truly gummed up (I did that once,
and ended up reinstalling the OS to resolve it).
*******
What I use, for checking out stuff like this, is
http://gspot.headbands.com/v26x/GSpot270a.zip
That program uses the same process as Windows Media Player would,
to play a video. To play a video, filter graphs are assembled,
like demuxing a video into an audio and video stream, then
attaching appropriate codecs to each stream, to get an audio
signal and a video signal.
http://en.wikipedia.org/wiki/Graphedit
The GSpot program, down near the bottom of the window, shows
what it is using for its filter graph. And it should be
doing the same thing as Windows Media Player. The codecs
are assigned weights, so if you install a "codec pack" and
now there are duplicate codecs present, somehow they
end up with different weights, so the must trustworthy
one is used in lieu of the others. It's something
along those lines.
It's not much to go on, but that's how you might debug
the Windows Media Player path.
VLC could be using something like FFMPEG/libAVcodec library.
More details here.
http://en.wikipedia.org/wiki/VLC_media_player
"Many of VLC's codecs are provided by the libavcodec
library from the FFmpeg project, but it uses mainly
its own muxer and demuxers and its own protocols
implementations."
That's a completely different set of plumbing.
And if it was your sound hardware or sound driver
that was broken, then both WMP and VLC would share
the problem. And yet, only VLC has a problem. So
that means a VLC audio codec has a problem. Or something
before the audio codec is corrupting the stream.
Start by reviewing the codecs being used for the
sample video. Then review whether VLC has problems
with the audio type being used.
Paul