Sudden change in video.... Vertical lines.

[meneedit]

Hi guys,

As of about 2 weeks ago I have noticed that whenever I play a video file and there is horizontal motion in the image, there are very thin semi-faint vertical lines appearing in certain places.

I've been doing a bit of troubleshooting to determine whether it is software of hardware related but in all honesty I'm still not quite sure.

Firstly and most importantly, the lines are still there when the video is paused, so I think that rules out my Bravia LED. If it were a trail artifact it would fade away upon pausing the video.

I have tried updating my grahics card driver and my media player but it hasn't helped so I think it may actually be my initial thought; I think it may be my graphics card slowly dying.

Have any of you experienced a sudden change that relates to vertical lines?

Thank you in advance.

[Selur]

make sure you turn of any color/image tweaking settings in your card drivers.
(had that, or a problem like that, years ago using a ATI card, when some driver update enabled some picture tuning option; not sure what it was called)

[meneedit]

I'll have a look. Thank you.

In the meantime, here is a screenshot of the problem in case anybody recognizes exactly what it is:



P.S.

I have an Nvidia Geforce 8400GS

[jagabo]

Bad decompression or colorspace conversion. Try a different video decoder. Try turning off hardware acceleration.

[meneedit]

I'm using The KMPlayer. I temporarily installed VLC which didn't produce the problem but I prefer The KMplayer.

I cannot find an option for hardware acceleration.... however, there are many options relating to colorspaces and decoders. I just don't want to go altering anything yet in case somebody recognizes exactly what it is.

[Hoser Rob]

.... I just don't want to go altering anything yet in case somebody recognizes exactly what it is.

Just make sure you change only one thing at a time, as you always should when troubleshooting. That's probably rule #1.

[meneedit]

Cheers, yeah, I was thinking the same thing

[jagabo]

Or, if you have a lot of options to try, perform a binary search, changing half the options, then seeing if the problem goes away. If it does you know the problem was in that half. Enable half of that half and try again. I the problem doesn't go away, reenable that half and disable half of the other half. Repeat until you've narrowed it down to a single item. You can test 1000 individual options in only 10 steps with a binary search like this.

[meneedit]

Or, if you have a lot of options to try, perform a binary search, changing half the options, then seeing if the problem goes away. If it does you know the problem was in that half. Enable half of that half and try again. I the problem doesn't go away, reenable that half and disable half of the other half. Repeat until you've narrowed it down to a single item. You can test 1000 individual options in only 10 steps with a binary search like this.

Good thinking. Thanks.

[sheppaul]

You must be using the video filter causing the problem. Find and disable it in the preferences of the player.

http://www.kmplayer.com/forums/showthread.php?p=41090#post41090