Storage requirements

[dprimm]

This may be a dumb question, but the information I had located (somewhere) apparently is not accurate. I am trying to calculate storage requirements for real time DV capturing. I would like to compare numbers for raw vs hardware encoded video as well.

Someplace I had located information that raw video was 100mb per minute. Today a guy helped me transfer 10min of video to disk and it was 2.4GB! This is more than 200mb per minute.

I want to capture the video for full screen (PC) playback. Does that make a huge difference in the raw video file sizes?

(when I saw raw files, I am talking immediately captured video stored as an AVI file).

These numbers are important as I am looking at hours and hours of video needing captured. If I use a card to encode to MPG-2 in real time, what type of storage requirements am I looking at? (MB per minute?)

Thank you.

[cmacleo]

2.4Gb for 10 minutes sounds like it is only compressd using huffyuv codec, a high quality, lossless codec that gives storage around there (normally I would of expected a bit smaller - I have a 15 minute video at about 2.1Gb at quarter frame 352x288).

Your size greatly increases depending on resolution (ie about 4x the above numbers for for full frame)

[holistic]

This may come as a shock to some ....

The CCIR 601 (NTSC) data rate is ~165 Mbps.

http://www.cs.sfu.ca/undergrad/CourseMaterials/CMPT479/material/notes/Chap3/Chap3.4/Chap3.4.html

Big Eh !!


DV is a compressed codec with ~3.7 Mb/s = ~220 per minute. That 10 minutes was most likely DV video

It is only possible to capture 'full' screen for a computer if it is running a 640*480 screen resolution since DV is 720*480 (NTSC spec)
Since most people these days run 1024*748 the video will require resizing.

Difference in video 'sizes' has nothing to do with screen size per say but everything to do with BITRATE (datarate)