Hard Drive Space, 1080 24p mode and the HV20
 

How much hard drive space will I need when shooting with the HV20 in HD 24p mode? Thanks.

24p is recorded to the tape as a 60i stream, so it should be exactly the same. It is still using the HDV compression.

Mike

I'm kind of new to HDV, and I haven't been in the world of video for a while , so excuse my ignorance....but how much hard drive space does 60i HDV take up?

Google... 'HDV data rate'

25 Mbps / 8 = 3.125 MBps * 60 = 187.5 MB/minute

Please correct me anyone if I'm incorrect.

Same as standard DV I believe...

I got 20 min of footage... 4 gigs roughly

Ah, it used to be so simple; with DV and plain HDV, you get about 5 minutes per gigabyte.

However, with HDV, and especially 24p HDV, you may want to convert to another format for editing. The reasons for this are covered pretty well in other threads on this board.

At this point, expect your hard drive requirements to at least triple.

I have been shooting exclusively in 24p since I got this camera. So after capturing in HDV, I almost immediately reverse the telecine and convert to Photo-JPEG format at the same time.

With JES Deinterlacer's built in Photo-JPEG codec, a 5-minute clip will balloon to about 3.3Gb.

On the Mac side, you could also use Apple Intermediate Codec, which is similar to Photo-JPEG and takes up roughly the same amount of space.

On the PC side, I believe most of the popular editing apps ship with their own intermediary codecs. Someone else will have to tell you about those, but I'd wager they take up a similar amount of space.

Hope this helps.

I got this info from the VASST site:

"If you have a computer that can edit DV, you have a computer that can edit HDV. HDV in 1080i format is the same bitrate (25Mbps) as DV is. However, depending on the system, you may experience choking on the system, depending on whether you're editing Transport Streams or with an intermediary codec such as the Cineform Connect HD codec."

Thanks everyone.

If you're on a mac, there are a couple tiny free calculators that you can download.

This is a widget that I've been using and it seems to have a lot of codec options for calculation:
http://www.apple.com/downloads/dashb...ideospace.html

And here is another application that seems to do the same thing
http://www.rabidjackalope.com/vdsc/


If these exist for the mac, I'm sure there are some for the PC as well, in case that's your computing platform. Anybody have any suggestions?

does anyone know what size file 24p or 25p would be when captured using NEO HDV? Since its capturing 24p not 60i I would suppose that its less that 60i using NEO?

I don't know specifically what NEO HDV is, but in other codecs I've looked at, the difference between 30 fps and 24 fps is that 24fps is 80% of 30fps and the diskspace required changes accordingly. The Widget I linked above allows you to set frame rate and figures it out for you.

So that's almost true... the clear advice for a slow CPU machine would be to leave the MPEG2 transport stream and convert to some intermediary....as long as the hard drive keeps up, because data rate will increase from 3 to say 10 megabytes per second (thanks Hal&Wes). And that is for one video track in the NLE. For my old Athlon XP1700 it did the trick, however.

NEO = Cineform
 

NEO is the latest incarnation of the Cineform software. Just came out, so no data, but probably the same large size.
I haven't switched over yet, but am happy how Cineform HD imports my 24p.