[mythtv-users] Safe way to downgrade from 0.25 back to 0.24?

[Jose Ildefonso Camargo Tolosa]

On Thu, May 3, 2012 at 1:58 PM, Michael T. Dean <mtdean at thirdcontact.com> wrote:
> On 05/03/2012 10:40 AM, Jose Ildefonso Camargo Tolosa wrote:
>>
>> On Thu, May 3, 2012 at 9:09 AM, Eric Sharkey wrote:
>>
>>> On Thu, May 3, 2012 at 9:35 AM, Jose Ildefonso Camargo Tolosa wrote:
>>>>
>>>> So.... what is involved on downgrading from 0.25 to 0.24? (without
>>>> losing recent recordings, of course).
>>>
>>> You would need to restore the backup you made before upgrading and
>>> then import any new recordings manually.
>
>
> Specifically importing new recordings into the Video Library (formerly
> MythVideo).
>
>
>>>    That's the only supported
>>> method.
>>
>> sigh.... time-consuming..... it is a hard decision.... eventually,
>> I'll go back to 0.25, so... invested several hours downgrading from
>> 0.24 looks like a bad idea :( , maybe I'll just live with my pvr150,
>> and wasting lots of disk space, until I get some more free time to fix
>> things on 0.25.
>>
>> On the other issue: is there anybody else having issues with
>> transcoding? (maybe I should open a new thread for that, right?).
>
>
> FWIW, disk space is pretty cheap (even with the price increase after the
> Thai flooding).  A 1TB HDD could store a /ton/ of 2GB/hr MPEG-2 SDTV
> recordings from an ivtv device.  And, FWIW, the transcoding supported by
> mythtranscode--to MPEG-4 ASP in an NUV container, and not H.264 in any
> "useful" container--doesn't really provide useful space savings, meaning
> you're better off keeping the video in the original MPEG-2 format.  You'd
> only want to transcode your ivtv recordings if you have a constrained device
> that doesn't support MPEG-2--and even then, you'd want to use something
> other than mythtranscode since that device won't support NUV container.

Right, but I don't have >US$100 to spare right now (and I will not be
able to spare it for at least another 6 months, or more)... also, more
disks=more power consumption=more monthly cost, more heat, more noise,
.....

For the about same quality, mpeg4 will require half the disk space.
Only downside here (and now) is that after the transcode mpeg4 file
looks ugly (but that's not supposed to be like that)... I´ll  try to
get some screencaps for you to see (mythtv deleted original file, so,
I have to do another recording, and do a transocde without deleting
the original file), however, on 0.24 (when I was able to use my frame
grabber tuner- USB), the mpeg4 quality of a recording from the USB
tuner was quite good, I mean: 2.2Mbps MPEG4 (nuv) file had about the
same quality as a 4~5Mbps MPEG2 file.

Now, maybe the comparison is not fair, because the USB tuner is newer,
and likely has better quality than the PVR-150, but all in all, MPEG4
use to be superior to MPEG2, while saving >=40% of disk space (I know
h264 is even better).

Ildefonso.