FORUMS: list search recent posts

Why does my HPX Shoot 720P/60P and 720P/30P as 720P/24P

COW Forums : Panasonic Cameras

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
Bruce MacKown
Why does my HPX Shoot 720P/60P and 720P/30P as 720P/24P
on Apr 23, 2010 at 6:17:16 pm

I have been using my HPX 170 occasionally for the last year, but always shooting in 720P/24PN. I never tried any of the other 12 modes until last week.

Finally, hoping to get slow motion video, I tried to record in 720P/60P. But I noticed that when I put the camera in the MCR Mode to view the video clips in the camera, when I view the thumbnails of the clips I can see that they were NOT recorded in 720P/60P, but rather 720P/24P (as it shows in the bottom of that window - next to the DVCPROHD icon).

Just to experiment, I tried to record in 720P/30P to see if I had the same problem - same result - it recorded in 720P/24P.

Strange thing though, when I Log and Transfer the clips into Final Cut Pro, I can see in the Browser Bin that these two clips I recorded in 720P/60P and 720P/30P, although they actually recorded in 23.98 fps (so 24P right?) Final Cut Pro assigns them a Compressor of DVCPRO HD 720p60, so maybe FCP knows somehow these were originally intended to be recorded at a different frame rate than the resulting 23.98fps.

I have since checked all of the 11 other record modes (from 1080i/60i down to 480i/24PA) and all seem to be working properly.

Hope you guys are not as confused as I am.

Do you think the camera was like this brand new and I missed it? I'm not a professional like alot of you guys so I didn't even think to check that all the record modes were working properly when I took it out of the box.

I don't think I dropped the camera or did anything to physically abuse the camera, and even if I did, why would only two record modes be affected?

Is this camera still in warranty? Does a warranty cover something like this?

Any help would be much appreciated.


Return to posts index

Noah Kadner
Re: Why does my HPX Shoot 720P/60P and 720P/30P as 720P/24P
on Apr 24, 2010 at 1:39:22 am

Did you put the camera into Film Mode first?


Check out my book: RED: The Ultimate Guide to Using the Revolutionary Camera!
Unlock the secrets of 24p, HD and Final Cut Studio with Call Box Training. Featuring the Sony EX1 Guidebook, Panasonic HVX200, Canon EOS 5D Mark II and Canon 7D.
Watch Formosa- My indie movie shot with the SDX900 and finished with Final Cut Studio.

Return to posts index

Adam Smith
Re: Why does my HPX Shoot 720P/60P and 720P/30P as 720P/24P
on Apr 24, 2010 at 5:11:30 am

Did the two test clips that you shot have audio? On the LCD, when shooting 60p does the frame rate show as "60p" or "24:60"?

RECORDING SETUP > REC FORMAT should be where you set the size and frame rate for normal shooting.

To shoot with under- or over-crank you'd set the REC FORMAT to one of the 720pN options, then adjust to your desired shooting frame rate with the SCENE FILE > FRAME RATE field.

If you were to shoot in 720pN24 with a frame rate of DEFAULT or set to 24 then you'd have the usual 24p clip you'd expect. But set the FRAME RATE to 60 - and now you're recording 60 frames per second for your 24p movie - 250% slow motion. Setting the frame rate to 12 would give you double-speed clips... 12 frames per second recorded, played back at 24. And since all 3 of the above examples are recorded as 720pN24 - they'd all show up (rightly) as 24p both during playback and in Log & Transfer.

The reason your clips show up as DVCProHD 60p is that the Native (pN) shooting mode is specific to these cameras, and it is not a standard 720p format. HD 720p spec requires 60 frames per second - so the Compressor field in FCP shows up at DVCProHD 60p - there is no other setting unless you pick 720p50 (PAL).

All the non-pN shooting modes are all 'over 60'. Shooting 720p30 or 720p24 result in a clip with the look of 30 or 24p, but over a 60p signal. Lots of duplicated frames... which is why shooting pN is so much more efficient.

I think your camera is fine. Do some testing and see if things make sense.


- - -
Video Photographer / Avid & Final Cut Editor

Return to posts index

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
© 2019 All Rights Reserved