24p for medical procedure web video?

I'm going to be shooting several medical procedures over the next month that will be turned into web videos. They'll include a talking head to intro the procedures, along with several minutes worth of actual procedure video. Camera will likely be locked down, and procedure won't (or shouldn't!) include any fast motion.

I'll be shooting with an hvx-200. Would I be better off shooting these in 720p 24 or sticking with interlaced (either DVCPRO50 or 1080i)? As far as deliverable size goes, we'll probably be posting at SD dimensions or less, but I hate to shoot anything in SD when HD will future-proof things for us a little better. I also realize that progressive is better for web content.

If I shot in 720p 24, would there be any significant drawbacks that any of you can see to that? Seems like the logical choice, but I didn't know if there was anything I wasn't thinking about.

thanks

If it's Web video, interlaced is rarely the best choice. You'll have to deinterlace, and you can either do that quickly and badly, or well and slowly.

The HVX-200 will do 720p60. Your client might appreciate the higher frame rate, depending on the technological constraints of how you're going to deliver it.

>Would I be better off shooting these in 720p 24 or sticking with interlaced

Your delivery format has pretty much decided this for you. Progressive it is.



www.strypesinpost.com

thanks for your thoughts!

I guess the other main question is do I shoot 24 frame or increase that to 60 as Jeff suggested? I don't need a filmic feel at all, and if 60 will give me a more "real" feel, that may be the way to go. I've only shot 24 frame when I've done progressive, so I guess I'm just looking for your thoughts on this question, too.

I'm in PAL land, man... It's straight up 25p over here.

If you do plan on creating a DVD version, this may be good read...

[www.lafcpug.org]



www.strypesinpost.com

If you use 24p, there will be a shutter effect if there is any kind of pan in your movement.
If you use 30p the shutter will be replaced with a blur.
60p will be your best bet, then you can treat it how ever you want in post...

Do you have the camera? Can you just test shoot some footage both ways (24p vs. 60p) and see which you like working with best?

Also, are record times and storage space a concern at all? I know some surgeries and medical procedures can last for hours and I'm not sure what your current record workflow is. You'll definitely be able to record for longer periods of time and use far less storage space shooting 24p(n) vs. 60p. So I don't know if that may have any effect on your record options at all but may help with making your decision.

Steven Gladney

Sometimes the obvious is hidden in plain view.

thanks for all your suggestions.

I should have some time to test 24 vs 60. Record times aren't a huge issue. The most we'd need to record at one time would be 15-20 minutes, and we have 2 16 gb p2 cards that should handle that amount of time just fine (about 16 min per 16gb card in 60 frame). We can also take our laptop to offload cards if needed, but that shouldn't be necessary. We had a meeting with the assistant to the surgeon yesterday, and he gave us all the info we should need about this shoot.