Preserve VHS commercial tapes, need capturing advice

[RobertVHS]

You're right, there is interlacing in the "no TBC" image. However. it's much more visible in the TBC versions.

I found out, that by using the "field delay" filter in VirtualDub the movies captured with TBC are transformed to look like the ones recorded without TBC. Kinda interesting.

[lordsmurf]

Quote:

Originally Posted by RobertVHS

I found out, that by using the "field delay" filter in VirtualDub the movies captured with TBC are transformed to look like the ones recorded without TBC. Kinda interesting.

Interesting, yes.

Concerning that particular filter, I wonder if it just does a field delay, or if it reverse the field dominance, too. Hopefully it does NOT do the latter, or at least warns you if it does.

I'm not so quick to believe the TBC is the cause of the delay. It's often just happenstance of when the digital recorder starts to ingest frames for A>D conversion. It's really possible both ways.

It's nice to see folks that do their own research, a sign of knowledge.
Good job, and thanks for sharing the findings!

[RobertVHS]

Unfortunately the filter does reverse the field dominance. And scene changes still look ugly on the PC monitor.
So my finding was not that great, even though it was interesting to me.

I don't know exactly, what the TBC does, but I also see the difference when using the ATI TV Wonder HD 600 USB stick (I got it yesterday).
With the TBC there are interlacing lines even when the movement is slow.
One thing to note is, that if there are commercials for other movies before the actual movie, these sometimes act the other way round - they look interlaced without TBC and not or not so much interlaced with it.
These observations don't change, they are reproducible for each movie (at least to the human eye).
A movie recorded from TV shows interlacing with and without TBC, but the interlacing looks "milder" in both cases (more like I thought normal interlacing would look like).

All of this confuses me quite a bit. I guess it's a PAL specific problem.