HD to SD

[Chris Borjis]

well I don’t know how else to explain it.

yes anything from a pro deck, digibeta, beta sp, 3/4″, D2 etc… is always upper field first.

I can confirm it by taking any footage from a pro deck and compressing it with ANY mpeg encoder out there mac or pc based.

it MUST be upper field first or the field order jitter occurs.

I learned this from years of being a compressionist.

It was that way even before I had fcp. The discreet smoke* specifies upper field first as well as it only connects to pro decks.

are you guys sure your not talking odd/even fields?

These decks are definitely playing and recording upper field first.

[Jeremy Garchow]

[Chris Borjis] “I can confirm it by taking any footage from a pro deck and compressing it with ANY mpeg encoder out there mac or pc based. “

WIth other workflows and codecs, yes this may be true. It is codec/hardware dependent. In the Apple/FCP and all current and developing capture card companies world, captured SD 601 NTSC is lff, rendered as lff. What it does when it gets to tape can change, but in FCP, it’s lff.

https://docs.info.apple.com/article.html?artnum=58634

[Chris Borjis]

that is such an odd thing, must be a bug in quicktime, because if I don’t force upper field first on pro deck captured material (no editing or going through final cut, just captured in final cut then compress the clips straight in compressor) I definitely have out of order jitter on playback. If I leave it set to auto interpret it also has the problem but only on captured clips.

wierd.

[Jeremy Garchow]

[Chris Borjis] “If I leave it set to auto interpret it also has the problem but only on captured clips. “

Sometimes, Compressor will guess wrong. I constantly have to set it to lower field first on SD interlaced clips. Auto ain’t auto enough, for me anyway.

Jeremy