Question about upper\lower fields in AVI.

[nzo]

Further to my other post elsewhere:
If the field order of "lower field first" applies to all my existing AVIs, can I assume it is correct to keep that field order the same throughout an authoring project, even though some authoring utilities default to "upper field first"?

Thanks ~ John

[junkmalle]

I'm not sure what you mean. Do you mean if you load several AVI clips into an editing app and some of them are identified as TFF and some BFF, although you know they're all BFF?

[nzo]

Yes - you're onto it

[thecoalman]

Encode or author them to what you know they are.

This does bring up an interesting question though, what if you have clips captured using different capture. Let's say some are from a ADVC which would be lower field and others from a PCI card which are upper field. Wah tdo you do then? Punt?

[junkmalle]

Most editing software lets you specify whether each source clip is TFF or BFF. Because they sometimes guess incorrectly.