[mythtv-users] List of recordings by disc drive -Solved

John Finlay finlay at moeraki.com
Tue Feb 10 00:38:28 UTC 2015


On 2/9/2015 1:47 PM, Karl Newman wrote:
> On Mon, Feb 9, 2015 at 1:20 PM, Mike's JdJ <stepsisters at comcast.net 
> <mailto:stepsisters at comcast.net>> wrote:
>
>
>     On 02/09/2015 12:53 AM, Bill Meek wrote:
>
>         On 02/08/2015 10:48 PM, Stephen Worthington wrote:
>
>
>
>         Here's a script using Python bindings that can probably be adapted
>         to print what was requested (for the 1st part.)
>
>         http://pastebin.com/wfpBfQ19
>
>
>     Thanks to Mike, Hika, Stephen, and Bill for the responses.
>
>
>     I ran Bill's report and it had the path/filename in it.  I took
>     the output and imported into LibreOffice Calc.  I chose fields for
>     the disc name and the timestamp portion of the file name.  I then
>     sorted on disc and timestamp. This gives me a list of titles
>     chronologically per disc. Multi-step, but this is a one-time need.
>
>     My goal is to use my newly-developed skills in editing and
>     transcoding and go after my two 1.8 TeraByte discs that are 98%
>     full.  My other two 1.8 TB discs are at 66% and 80% full.  The DBA
>     in me says to start with the oldest file in the fullest disc
>     first, then reduce the size of the next-oldest file, and so on. 
>     With 1,883 recordings, this will take a while.
>
>
> The general sense on this list is that it's cheaper to add storage 
> than to spend the electricity to transcode in order to save space. 
> Obviously you already have a number of disks so I'm guessing you have 
> physical space reasons for wanting to transcode instead of adding drives.
>
This depends on the cost of electricity, the speed of the transcoding 
computer and the quality of the output. My experience with a fast quad 
core i7 and $0.20 per kwh electricity transcoding 720p recordings from 
mpeg2 to h264 shows that transcoding is much cheaper than buying a new 
disk by an order of magnitude. Of course deleting old recordings is much 
cheaper than that.

Example transcode: 15m to transcode a 4GB 1h mpeg2 to 1GB h264 using 
handbrake in an i7 system that uses 70w.

70*.25/1000 = .0175 kwh at $0.20/kwh = $0.0035 for 3GB gain is 
$0.00116/GB saved

A 2TB drive that costs $70 costs $0.034/GB

John
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