Playback problem on PC with .MTS files

[CompVid]

I've just finished configuring a brand new home built PC for my wife and am having a problem with playing back .MTS files from her camcorder's flash card (direct from the card or when I copy the files to the PC). The same files play fine on my own PC (about 2 years old, different hardware) using the programs that I have also tried on my wife's PC.

The problem is that there is a 'venetian blind'/ripple effect to the played files whenever the camera moves, ie ONLY when the camera moves. I have tried VLC, Totalmedia Theatre 6 and Windows Media Player but all are the same (although Windows Media Player DID play them back okay earlier until I did a reboot!).

I tried downloading the K-Lite video codec pack but am not even sure it installed due to the extra nonsense program that it also tries to install!

My wife's new PC config is as follows:

built-in video chipset is an AMD Radeon HD 7650D
CPU is AMD A8-5600K APU with Radeon HD Graphics (not sure if this is being 'used' at present as i'm new to APUs)
motherboard is an ASUS F2A55-M

Edit: Well this is weird - it sometimes DOES playback smoothy with Windows Media Player, but more often than not it doesn't and I have no idea why.

Is this a Codec issue?

Any ideas please?


Thanks

[poisondeathray]

"venetian blind/ ripple effect" during movement suggests to me it's interlaced, and you haven't activated a deinterlacer

e.g in VLC video=> deinterlace on , video=> deinterlace mode (choose either bob or yadif 2x)

[CompVid]

Thanks for the suggestions - no luck with them as suggested BUT if I turn interlacing ON in VLC then the videos look fine!

Very puzzling - also no luck with Totalmedia Theatre (no big deal there) or Windows Media Player.

So why do the .MTS files plays okay in VLC (on my wife's new PC) but ONLY with interlacing On, yet on my own PC they play fine with the interlacing On or Off (default is Off)?

[aedipuss]

ehh? you are confused. interlacing is or isn't present in video files, you can't turn it on or off. deinterlacing is a filter that can be applied to the video or not.

[CompVid]

Understood, but why does turning ON the deinterlacing resolve the 'venetian blinds' problem? It's not necessary on my own PC and that has an older and 'weaker' hardware setup than my wife's new machine.

[aedipuss]

interlaced video is saved as 2 separate fields for each frame. every other line goes into one field the rest to the other. combined makes one frame. it's the way tv has worked from the beginning. computer monitors display an entire frame at once not one field at a time. in order to display interlaced video on a computer monitor it needs to be combined and displayed as one frame, not one field and then the other. hence all the "filters" to de-interlace video. there is no perfect way to do it as the fields were recorded at separate times and putting them back together tends to make stair-stepped pictures. if not done properly it can look like venetian blinds.

are you sure you are talking about the same video on the 2 different computers? the cam may record either interlaced or progressive depending on the settings.

[CompVid]

Yes, it's the same video on both computer, I simply copied the same file from one to the other.

I can't help wondering if it's a codec problem on my wife's new PC, or maybe a video driver issue.