720p Native or 720p Regular?

K

kayotv

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a producer has asked if he should be shooting 720p Native or 720p Regular. They are using HVX200 shooting to P2. We are cutting on an AVID MC 3.0 Beta, using MoJo DX.

Ok, I'm totally aware that the word BETA screams trouble, still I'm not to sure about why he's asking.

So, if anyone could direct me to understanding the difference between these two would be great.

AVID Panasonic AG-HVX200 Support Overview states:

* 720P/24PN 23.976 frame progressive sources stored natively as 23.976 as a file on disk in the HD720P format


* 720P/24P 23.976 frame progressive sources stored natively as 23.976 within the 720p/59.94 frames stored as a file on disk in the HD720P format
 
PN takes up less space because it only records the 24 individual frames. It ends up being about 50mb/sec which means you can fit 40 minutes on a 16GB card.


Marco
 
DEFINITELY use PN mode. Just make sure that your frame rate is set to "default" so that you're properly capturing audio.
 
Hey Barry...

Why not shoot in 720p? Besides the larger file is there a downfall? I just got the HVX200 recently and shoot almost exclusively in 720p, to be honest I wasn't sure what 720pn's advantages are. Thanks in advance.
 
Shooting 24PN...if you are delivering a 23.98 HD master, mastering to 24fps film or outputting to DVD. Space savings, and native 24fps "film look" frame rate.

24P plays at 29.97...this is good if you are delivering a 29.97 master tape.
 
take2visualmedia said:
Hey Barry...

Why not shoot in 720p? Besides the larger file is there a downfall? I just got the HVX200 recently and shoot almost exclusively in 720p, to be honest I wasn't sure what 720pn's advantages are. Thanks in advance.
Click to expand...

It's actually exactly the opposite. There's no advantage to shooting in 720p, you always use 720pn, no idea why they even have both, I've worked with a bunch of DPs who have talked with a bunch of others, etc., everyone uses that. Nobody even really asks much what we want anymore, they just say, "720pn right?" We say, "Yup."
 
I like to use OnLocation to get the scopes and the full screen monitor when I can, in which you have to use 24P to get the Firewire output, but o/w, I agree I always use 24PN.
 
When recording to the P2 cards, always use 24pN.

When recording out the firewire port (such as to a firestore or OnLocation) that's when you'd use the 24P mode.
 
This is great info guys thanks. I'll switch to PN for new projects. I do have a long term shooting project that I have been shooting in 720p. It will go out to DVD...should I expect any problems?

...remember when it was just Beta???
 
I often have daydreams of the simple days of beta and digibeta. 720x486 at 29.97...PERIOD. DV was slightly different, and the missing 6 lines of vertical resolution were the only complication.

Man...a wish for simplier times...
 
Shane, I often feel the same way. Shoot on one format, ingest and edit in one format, and deliver in one format. Lens to delivery...simple. :)

But as long as I've been doing video, I enjoy the challenges, usually. :)
My biggest problem is the fact that with so many "flavors" of video, it seems like voodoo to get multiple software applications to work together. If we did one type of production it would be easier, but we do so many types of production that every day we're trying to remember how we ingested/exported something last week or month. :(
 
I guess I've been dealing with format issues in the audio world for so long I'm used to choosing strawberry banana instead of apple blueberry. We've had to deal with 7.5, 15 or 30 ips, ...2,4,8,16,24 or 32 tracks... Dolby A,B,C,SR or DBX type 1 or 2 noise reduction... IEC (US) or CCIR (Euro) eq curves,..mono, stereo, LTRT, 5.1 or 7.1 mixing... digital emphasis on or off... 44.1k, 48k, 96k, 192k... 16 bit, 24 bit, 32 bit floating point, 1bit... NTSC,PAL,SECAM


You get the picture.:shocked:
 
As far as i know it is not thrue,but this is what Panasonic techical support told us.When you choose PN mode,camera automatically records 50mb/s not 100mb/s(in HD mode).Thats how you can shoot double recording time,as far as he sadi..It sounds silly but i want to be sure if there is any quality&resolution or any technical differences between PN or P.I couldn't convince him about the actual frame recording logic..
 
Only in so far as you are shooting 25fps in a 50fps stream, and Pn is stripping the extra 25fps dupe frames out, giving you only 25 frames recorded.

Half the data, hence 50mb/s instead of 100mb/s

Quality of image stays the same.
 
isn't it matter?Or a issue for the quality of the picture..i think so..is this the disadvantage of being PAL user .And i am also firestore user and P2 card
 
Insert 30fps / 60fps instead of 25/50, same thing applies, no disadvantage being a PAL user.

Pn means double the recording time due to doing this pulldown in camera.

The only time you wouldn't want to shoot Pn is if you wanted a soundtrack while shooting any frame rate other than 25fps (in PAL land)
ie, if you shoot 50fps in Pn the sound will be stripped.

Shoot in 50P, converting the framerate to 25 in post for the slomo, and you end up with a realtime soundtrack.
 
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720pN and 720P mode are *identical* in picture quality. The only difference is the actual number of frames recorded. pN doesn't record duplicate frames, so it takes up less space.
 
Barry_Green said:
When recording to the P2 cards, always use 24pN.

When recording out the firewire port (such as to a firestore or OnLocation) that's when you'd use the 24P mode.
Click to expand...

But if i use OnLocation just for monitoring, i can use the 24pN? or allways the 24P no matter what?
 
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