Interlace field order

[zedolfblack]

Importing some captures made with my WinTV Go PCI card i see that TMPGEnc Project Wizard identifies them as:

Interlaced Top field first (field A)

All the captures that i've imported into TMPGEnc with the Project Wizard show the same properties.

Can i assume that all captures i make with this WinTV card will be the same??

Is it the hardware - my WinTV card - that determines the interlace field order??

Thanks for any comments.

Martin.

[sikki_nixx]

I'm not sure exactly what determines the field order but A is the correct one for all my captures also... Even though tmpgenc sometimes identifies my captured avi-files as B (and they look very bad on my TV if I don't change it to A...)

However I guess that if you keep capturing like you do know, A will always be the correct field order.

[fmctm1sw]

Can i assume that all captures i make with this WinTV card will be the same??

Could very well be. However, after mine got mixed up somehow, and I converted 48 Three Stooges episodes (all with the wrong field order), I decided the 10 seconds it takes to check field order worth the time....

[SatStorm]

The "rule" is that any analogue capture is top field first and DV are always bottom field first. There are exceptions - some cards do that vice versa for drivers reasons - and also the vfm drivers from Hauppauge for win2k/XP have this problem. You never know from sure...
But if you install the latest btwincap wdm drivers, for all the bt8xx(x) Hauppauge cards, it is Top Field first.

[zedolfblack]

Thanks for the replies.

Yep, i'm using the latest (and greatest?) Sourceforge WDM drivers.

Martin.

[msugny]

u just have to watch ur avi file in windows media player using an avisynth script :


*****script*****
avisource("aaa.avi")
assumeframebased
separatefields
***************
if the script plays well it's ok (top field first) if not u have to add this to the end of the script :
**
complementparity
**
now the script is playing first bottom field as 1st frame (720x240x59.94 or 720x288x50)