VIdeo Data Rate

[Shane Ross]

Near the bottom of this page there is a great Data Rate calculator that AJA makes…and it’s FREE!!

https://www.aja.com/support_kona.html

[David Roth weiss]

Even better is the free VideoSpace Widget available from Digital Heaven that’s free at: https://www.apple.com/downloads/dashboard/calculate_convert/videospace.html

[Craig Seeman]

DV and HDV are the same data rates. I think you’re confusing Megabits and Megabytes.

[Gary Adcock]

[Richard Martz] “A few weeks ago I was looking for data rates for various forms of video including some forms of HD. I needed this to determine if my planned storage medium would be enough for a project I contemplated doing. I could not find it anywhere and could not find anyone here on this post that could help either. “

Richard
this info is readily available on the web and with tools like the Data Rate Calc available free from AJA. <https://aja.com/ajashare/AJA_Data_Rate_Calculator_v1.1.1.app.zip>

While your post is full of good info– without the frame rate information for each compression level it will not serve you in the long run. There is not a also mention of how many audio tracks are being captured as part of these setting.
Example: DVCPRO HD

[Richard Martz]

DV and HDV are NOT the same data rates.

[Shane Ross]

As quoted from HD FOR INDIES FAQ:

https://www.hdforindies.com/2005/05/hd-for-indies-frequently-asked#tapeformats

DV – 720×480, 8 bits, 4:1:1, 25 megabits/sec aka 3.6 MB/sec w/audio.
HDV – three formats:
720p30 at 1280×720, 4:2:0, 8 bits/channel, 19 megabits, how many audio, compressed?
1080i60 at 1440×1080, 4:2:0, 8 bits/channel, 25 megabits, how many audio?
ProHD – 720p24/25/30/60 (60 off of camera but not to tape), 1080i yes, 1080p? Audio?

DV is 25MB/sec. HDV at 1080i is 25MB/sec…and 720P is LESS at 19MB/Sec. In a recent posting here at the Cow Graeme stated that DV compression is 5:1, and HDV compression is 25:1 (larger area to compress to get to 25MB/sec).

[Craig Seeman]

I second Shane.
Gary’s additional info is important too.

There’s a reason why the same transport and guts of a camera can write either DV and HDV to tape (oversimplification, I know) but they ARE the same data rate as far as what’s happening at that point.

I think people should be required to take a technical test before being allowed to shoot and edit! Hmm, Certification! As a former Video Engineer, the misinformation on the web is amazing. At least make it a requirement to read Adam Wilts’ page.