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zeke meginsky
Upper or lower field first?
on Jul 1, 2011 at 1:09:48 am

I'm ripping some footage from a DVD using MPEG Streamclip and with the 8 bit uncompressed format setting (since I read that is one of the most lossless formats to do this, virtually identical?). The footage was originally shot on a mini-DV camera. I'm not sure how they recorded the tape to a DVD, but they may have used a DVD Recorder and not an editing program. I really don't know.

Anyway, there's an option for upper or lower field first. It says lower field first is for DV footage...but should I take this with upper field first since I'm getting it from a DVD and not ripping it with a DV codec..?


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David Roth Weiss
Re: Upper or lower field first?
on Jul 1, 2011 at 1:16:34 am

Don't use 8-bit uncompressed, you'd need a RAID to play that back without dropping frames and it's overkill. DVCPro50 is all you need to get more than the max when ripping a SD DVD (though ProRes 422 wouldn't hurt either), and if you're in the good old USA it's lower field dominant.


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zeke meginsky
Re: Upper or lower field first?
on Jul 1, 2011 at 1:19:17 am

Oh okay, thanks a lot!


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Andrew Evans
Re: Upper or lower field first?
on Jul 1, 2011 at 3:18:49 am

click on show stream info and that will tell you frame rate and field dominance.


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zeke meginsky
Re: Upper or lower field first?
on Jul 1, 2011 at 11:19:55 am

Oh okay, will do, thanks.


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Rafael Amador
Re: Upper or lower field first?
on Jul 1, 2011 at 11:47:43 am

[Andrew Evans] "click on show stream info and that will tell you frame rate and field dominance."
Right. MPEGstreamclip will tell you the real field-order.
Normally MPEG-2 flags well the field order.

[David Roth Weiss] "Don't use 8-bit uncompressed, you'd need a RAID to play that back without dropping frames"
David, this is SD.
FW-800 can cope with it.

[David Roth Weiss] " and if you're in the good old USA it's lower field dominant."
Not at all.
Half of the Hollywood movies DVDS are Upper first.
rafael

http://www.nagavideo.com


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Alan Okey
Re: Upper or lower field first?
on Jul 1, 2011 at 1:10:15 pm

[Rafael Amador] "Half of the Hollywood movies DVDS are Upper first."

I'd say most "Hollywood movies DVDs" aren't interlaced at all - they're native 24p. It's up to the DVD player to add 3:2 pulldown on output when needed.


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Rafael Amador
Re: Upper or lower field first?
on Jul 1, 2011 at 1:30:23 pm

[Alan Okey] "I'd say most "Hollywood movies DVDs" aren't interlaced at all - they're native 24p. It's up to the DVD player to add 3:2 pulldown on output when needed."
You right Alan, but MPEG-2 for DVDs, even if they were Progressive, they were flagged as Interlaced.
The MPEG-2/DVD progressive standard is quite recent. Was introduced just few years ago with the arrival of the Progressive DVD players.

[Alan Okey] ... they're native 24p. It's up to the DVD player to add 3:2 pulldown on output when needed."
Right, but even in this case you have two option for the outgoing NTSC (29.98) video signal. Being the original picture progressive,putting out Lower or Upper won't make difference.
rafael

http://www.nagavideo.com


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