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how to deliver 11 hours of video
I have 11 hours of conference video and I’m trying to figure out whether to deliver as .wmv files on CD-ROMs or on DVD. Does anyone have a good calculator for how much disk space one hour of video uses at various bitrates?
Also, what is the maximum time that will fit on a DVD and still look okay? Do you just reduce the bitrate on the mpeg2 render, or is it better to let DVDA render?
Thanks!
Mary Waitrovich
UW-Madison -
3 Replies
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for talking heads i use a average bit rate of 2,400,000 (max 2,800,000) to fit 4 hrs on a DVD .. looks much better then VHS .. i have found that using a constant bit rate of 2,000,000 may not play on all desktop DVD players …
you could just drop 4-5 hrs into DVDA then use optomize to see what it comes up for a bit rate …
also if you have a dula layer DVD burner you can double hrs …
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My streaming calculator (no longer available for download than I can find) says about 200MB per hour of 512Kb/s wmv. Presumably 400MB for 1024Kb/s. If you’re concerned with space and the number of CDs/DVDs you’ll need for 11 hours I suggest that you’ll find your sweet spot somewhere between these two bitrates.
You should see how 512 works at 320×240 with your content, and try viewing it at 640×480 and fullscreen – probably a little fuzzy, but may be acceptable for conference video. 1024 at 640×480 should look very good at native resolution and full screen if the source video is good.
Let me grab that slide rule :-0 you could probably get all 11 hours on a single layer DVD-Data at 1024Kb/s. (but you might want to test a little first because its a tight fit and 11 hours of video is a lot of rendering!)
If nothing but outstanding video will do, you’ll probably find it somewhere between 1400 and 2400Kb/s bitrates with wmv. But I use 1024 frequently.
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You should ask the client first. Ask them what they intend to do with the footage, and how they intend to view it. And, how important is picture quality to them?
Charlie
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