[Hidden-tech] Video Codecs for long-term storage

[Jan Werner]

Why do you want to use DVR-DL for long term storage in the first place?

2TB hard disks currently sell for $100-$120 and hold as much data as 
about 240 DVD-DL discs. Good quality DVD-DL discs (Verbatim) cost at 
least $1 each, so even with zero coasters, they are at least twice as 
expensive per GB as hard disks, and a lot more hassle to burn and keep 
track of. 1TB hard drives are not quite as cheap per GB, but still much 
less costly than DVD-DL.

Far better to keep duplicate copies of each video on multiple hard disks 
and, to be extra safe, include PAR2 files with each video file,

Jan Werner
___________


Will Loving wrote:
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> Here’s a question for the video mavens out there. My son goes to PVPA
> (Pioneer Valley Performing Arts Charter Public School) and starting last
> year, we began video recording some of the performances. We would like,
> eventually, to establish a viewing archive in the library of past
> performances at the school and are trying to think about short term and
> long-term storage and video formats.
>
> There are two main issues, viewing and storage.
>
> Most of the video we are shooting at the moment is in AVCHD format,
> which for a performance under two hours will just fit on a dual-layer
> DVD. However, we usually want to edit that video to clean it up, add
> titles, credits, directors notes, etc. In the process it all get’s
> transcoded to DV .mov format in iMovie which triples the size. Since
> Blu-ray is not an option and the DV format is just to large for
> reasonable storage at this time, we need to figure out two things: the
> best video format to save to for long-term backup storage that will fit
> on a DL DVD, so under 8GB, and the best format to save to for HD based
> storage on a viewing station in the library.
>
> For storage purposes on a DL DVD, there is no way that I’m aware of to
> easily transcode the edited video back to AVCHD. iMovie can export via
> QuickTime to various formats and we could also use Handbrake to render
> the edited and exported DV file down to something under 8GB, but I still
> don’t know what the best format for that would be. I’m pretty sure
> Handbrake has a sizing option where you simply say, render to 7.8GB and
> it will do the amount of compression to get it there, but is that the
> best way?
>
> As for the viewing station, the same format that gets it to under 8GB
> might be fine in terms of current available HD space. Over time HD space
> will only get cheaper and more available but right now we can’t be
> storing 30-40GB files. The related question I have is whether there are
> differences in format that would affect viewing from a NAS vs a local
> HD? Is there some format would be better over the network or should we
> perhaps have two versions – high-res for local and lower-res for network
> viewing?
>
> Comments?
>
> Will
>
> Will Loving, President
> Dedication Technologies, Inc.
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> William M. Loving
> Dedication Technologies, Inc.
> 7 Coach Lane
> Amherst, MA 01002-3304 USA
> will at dedicationtechnologies.com
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