status aliasing when playing video???

[parker]

when play the video file (. VOB ...), the video images were serrated (when there is an operation on the video)
please help ....thanks!

[Technologicat]

(Please ask general usage questions in the troubleshooting forum: viewforum.php?f=2.)

Moving objects get sawlike edges in a VOB? It's probably interlacing.

There are two main types. To identify the problem:

1. For general information on interlacing, look here:
http://en.wikipedia.org/wiki/Interlaced_video
http://100fps.com/ (has lots of pictures)

If this is the problem, you can try the deinterlacers in VLC, and see which one works the best for you. Assuming you have VLC 1.1.5, from the menu, choose Video > Deinterlace > On (or Automatic) and then Video > Deinterlace > Deinterlace mode > (try the different modes here). This should solve the problem.

2. If the VOB comes from a movie or other film material that was originally progressive (not interlaced), it may have been telecined. Explanation with diagrams (easier to understand after reading the 100fps site above):
http://neuron2.net/LVG/telecining1.html

The site describes NTSC telecining ("3:2 pulldown") used in America and Japan, but there also exists a 2:2 pulldown for PAL (Europe, Australia). Other, more exotic schemes exist, too. It's a mess :)

VLC currently does not have a filter for removing telecine properly. I'm investigating whether one could be added in a future version, but I can't promise anything.

If your VOB is telecined, at the moment you may wish to try another player for it. Assuming that your VOB is NTSC, in Windows, I've heard that Media Player Classic should work, if you install the DScaler filter. In Linux, Xine and Kaffeine both have an advanced deinterlacer that has this "film mode" for NTSC. Kaffeine is easier to use of the two (just enable deinterlacing in the menu and it's automatic). On the Mac, I don't know of a solution (which is why I'm interested in adding one into VLC).

It's possible to use a deinterlacer to watch telecined video, too, but the result won't look as good. If you wish to go this route, see the advice for 1. above.