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JVC GR-HD1U / JY-HD10U
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Old November 1st, 2003, 10:25 PM   #1
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Thinking of purchasing for slow-motion...

Well, i've been looking at this camera for a while. I own a DVX100 as well as a PAL XL1s, but all opinions aside, one thing the HD1/10 can do(i hope) that no other camera can do is decent slow motion...

Right now, my main use would be to record SD video in 60P and slow to 24P. Does anyone have any experience or even better, sample footage of how the slow motion looks?

If it does it well, then it is worth it to me just for that feature alone. I just want to make sure there is no problem i haven't heard of. Also, does the HD1/10 use the entire HD area of the CCD chip when in SD mode and then resize it down, or does it cut down the sampling area of the CCD to SD?

Thanks,
Juan
Juan P. Pertierra is offline  
Old November 4th, 2003, 08:35 AM   #2
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I am also in to this!

I also very in to this function, but you should konw that the Aspect HD software does not support this function yet. But they are informed about it. .. Have you tried the twixtor plug-in yet?
/j
John Eriksson is offline  
Old November 4th, 2003, 10:19 AM   #3
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I don't have the camera yet, so i haven't tried it.

However, i would think if you can get 60P video out of the camera, it is a simple matter to slow it down. My question is, how does it encode 60P in the standard DV algorithm? I understand how 30P could be encoded, but 60P?

Juan
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Old November 4th, 2003, 12:01 PM   #4
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slomo

Slow Motion is achievable with this camera. I have done it myself using the JVC supplied software (the only thing I use that software for) until Aspect HD supports the 480p60 it's the only way to capture it. Once it is captured I convert to either uncompressed AVI or to Quicktime MPEG 4 and then import into after effects or Premiere and alter the frame rate and voila. I looks pretty good, similar to the Panasonic Varicam but at 1/10th the price. Of course their frame converter does alot more impressive things to the slow footage but if you tinkered in AE for a while I'm sure you could mimic it pretty well.
Mark Jervis is offline  
Old November 4th, 2003, 12:48 PM   #5
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The "DV algorithm" is not used for either the 480p60 or the 720p30 mode (only 480i60 is DV.)


----

Cool slow motion today.

Here is to do 60p->30p (or 24p) slow motion today. For advanced PC users:

1) capture a 480p60 M2T file.

2) Use GraphEdit to convert the M2T to AVI.
http://screenplay.virtualave.net/images/60pGraph.png

Note: If you are using Aspect HD you will have all these components and they connect up easily. If you aren't use Aspect HD you will need a MPEG demux/deoder and HUFFYUV encoder (or similar.)

3) Open the new 60p.avi file into VirtualDub.

4) Add a resizer filter (select filter and then pick resize.)

http://screenplay.virtualave.net/ima...lectFilter.png

5) Set the size to 1280x720 and set the filter mode to something better than "Nearest neighbor".

http://screenplay.virtualave.net/ima...o30pFilter.png

6) Change the frame rate to 29.97.

http://screenplay.virtualave.net/ima...tFramerate.png
http://screenplay.virtualave.net/ima...Framerate2.png

7) Optionally set the export compression to HUFFYUV or leave it uncompressed.

8) Select "Save As AVI..." from the file menu.

9) Import the resulting slowmotion file into Premiere.

You're done.

It looks really cool.

We hope to integrate this in Aspect HD in the future (i.e. remove all these steps) but it can be done now if you wish used third-party freeware tools.
David Newman is offline  
 

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