Panasonic Cameras Forum
Real DVCPRO HD Bitrate?
Real DVCPRO HD Bitrate?
by Dylan Reeve on Aug 23, 2008 at 11:30:53 pm

100Mb/s is the simple answer for DVCPRO HD data rate, but not totally accurate, at least in some cases.

I've been working with Varicam, at 25fps which actually results in a datarate of 42Mb/s ((100 / 60) * 25). So that's the case for Varicam, does it apply equally to all DVCPRO HD recording? Is 720p at DVCPRO done with static data allocations per-frame - so will a 720p frame in DVCPRO HD always be 1.66Mb?

I haven't got any 1080 footage to look at.

How does the achieved bitrate vary from the format bitrate in different modes? What are the real achieved bitrates for 1080i50 and 720p25 with P2 acquisition?




Re: Real DVCPRO HD Bitrate?
by John Fishback on Aug 24, 2008 at 5:18:08 pm

Check out Digital Heaven's Videospace online app. You choose the format, enter length of clip and it gives total space needed.

http://www.videospaceonline.com/

John

Dual 2.5 G5 4 gigs RAM OS 10.4.8 QT7.1.3
Dual Cinema 23 Radeon 9800
FCP Studio 5 (FCP5.1.4, DVDSP4.1.1, Comp2.3, STP1.1, Motion 2.1.2)
Huge U-320R 1TB Raid 3 firmware ENG15.BIN
ATTO UL4D driver 3.50
AJA IO driver 2.1 firmware v23-28
Pro Tools HD w 192 Digital, SYNC IO, Yamaha DM1000, Millennia Media HV-3C, Neuman U87s, Genelec Monitors, PrimaLT ISDN


Re: Real DVCPRO HD Bitrate?
by Charles Taylor on Aug 27, 2008 at 9:04:09 pm

AFAIK assuming a static frame size based on 100mb/s for the standard rate would be fairly accurate.
ie.
1080i60 ~ 100mbs
1080p24 ~ 80mbs
720p60 ~ 100mbs
720p24 ~ 40 mbs

etc.







© CreativeCOW.net