[mythtv-users] Can I mythexport without transcoding?

Another Sillyname anothersname at googlemail.com
Fri Sep 3 19:14:21 UTC 2010


On 3 September 2010 19:53, Another Sillyname
<anothersname at googlemail.com> wrote:
> On 3 September 2010 19:48, Another Sillyname
> <anothersname at googlemail.com> wrote:
>> On 3 September 2010 19:36, Matt Emmott <memmott at gmail.com> wrote:
>>>
>>>
>>> On Fri, Sep 3, 2010 at 2:01 PM, Another Sillyname
>>> <anothersname at googlemail.com> wrote:
>>>>
>>>> On 3 September 2010 18:35, Matt Emmott <memmott at gmail.com> wrote:
>>>> > On Fri, Sep 3, 2010 at 1:09 PM, Another Sillyname
>>>> > <anothersname at googlemail.com> wrote:
>>>> >>
>>>> >>
>>>> >> Matt
>>>> >>
>>>> >> Perhaps you could give an outline of exactly what you're trying to
>>>> >> achieve and people could suggest a different way to get to the end
>>>> >> result?
>>>> >>
>>>> >> For example I'm trying to get my head around why you would use an RSS
>>>> >> feed to distribute the information rather then a pull from a web link.
>>>> >>  Are you wanting to remotely automatically pull the program based on
>>>> >> it being in the RSS list?
>>>> >> _______________________________________________
>>>> >
>>>> > Heh, sorry. I sometimes go all over the map with these posts.Here's what
>>>> > I'm
>>>> > trying to do:
>>>> >
>>>> >
>>>> > I have my myth system set up at home, and I've built a combined BE/FE
>>>> > here
>>>> > at work, as well as on my work laptop. In a nutshell, I want to
>>>> > transport
>>>> > recordings to work to watch at lunchtime etc, and I want to use Myth to
>>>> > play
>>>> > the movies at work. Some coworkers have expressed an interest in Myth
>>>> > for
>>>> > themselves and I want to be able to demo its features.
>>>> >
>>>> > I want the highest quality possible since we have both a 60" Plasma and
>>>> > very
>>>> > nice (albeit 720p) projector in our conference room. As was stated
>>>> > previously, moving that much data across the internet is not such a hot
>>>> > idea, although I could see myself doing a one-off download if needed (I
>>>> > have
>>>> > a 2mb uplink from home).
>>>> >
>>>> > The reason I attached myself to mythexport is two-fold: One, I would
>>>> > like to
>>>> > automatically export recordings to an ipod-friendly format for my Evo
>>>> > and my
>>>> > girlfriend's iPod. That's out of the scope of this post but it's what
>>>> > got me
>>>> > into mythexport in the first place. Two, I want an easy, semi-automatic
>>>> > way
>>>> > to get tv shows from home to work and have virtually no coding, html or
>>>> > sql
>>>> > skills. So the thought was to have mirobridge running on my portable
>>>> > computer and mythexport on my home computer, and either manually import
>>>> > the
>>>> > specific episodes through Miro or set up subscriptions and let my
>>>> > computers
>>>> > do the talking automatically.
>>>> >
>>>> > I have a lot of ideas in my head at once so I'm sorry if I wasn't more
>>>> > clear
>>>> > in my other posts. Thanks for the input though, sometimes I need to be
>>>> > smacked around to stay on track. :-)
>>>> >
>>>> > _______________________________________________
>>>> > mythtv-users mailing list
>>>> > mythtv-users at mythtv.org
>>>> > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>>>> >
>>>> >
>>>>
>>>> OK
>>>>
>>>> In that case I'd suggest you go a different way.
>>>>
>>>> I don't know if you've played with mythweb?  If you have you can see
>>>> that there are links on the recorded programs pages that will allow
>>>> you to 'pull' the source file either before or after a transcode.  I
>>>> have to say I'd STRONGLY urge you to do some kind of transcoding as
>>>> pulling a 1gb file even over a 2mb link is going to take a lot of time
>>>> and also upset your ISP in all likelihood.  The other advantage with
>>>> nuvexport is it changes the output files to 'recognisable' names and
>>>> can also strip all adverts as well as topping and tailing the
>>>> recording, by outputting the files to a storage group you can also
>>>> access them remotely via mythweb.
>>>>
>>>> To just 'view' quickly stuff at work flash will probably suffice (and
>>>> transcoding into flash can almost be done on the fly if you have a
>>>> decent processor at the back end), however you should perhaps look at
>>>> using nuvexport to transcode to high quality avi's or x264's and then
>>>> pull them for movies and stuff.
>>>>
>>>> To give you an example a 6-7GB BBC HD x264 1080 source recording will
>>>> usually compress down to about 1.1GB x264 720p after transcoding
>>>> without any quality loss IMHO.  1.5GB Standard Definition (SD)
>>>> recordings can be compressed down to 250-300mb files.
>>>>
>>>> Hopefully this will give you another path to think about, the tools
>>>> already exist to do what you want and you don't need to re-invent the
>>>> wheel.
>>>>
>>>> Regards and have a good weekend.
>>>> _______________________________________________
>>>>
>>>
>>> Thanks, but that's not what I want to do. Viewing stuff from work over flash
>>> is unwatchable full-screen. It's really blocky and pixelated.
>>>
>>> I use mythweb a lot, but I don't want to pull down each recording manually,
>>> nuvexport it, and then pull it to my other myth machine. With my idea I'd
>>> set up an export and then just run the export user jobs on the recording I
>>> want, and pick them up on the portable Mythbox.
>>>
>>> As for the bandwidth, I'm not sure if you saw it but the copying over the
>>> net piece would only be on a one-off "emergency" basis.
>>>
>>>
>>> _______________________________________________
>>> mythtv-users mailing list
>>> mythtv-users at mythtv.org
>>> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>>>
>>>
>>
>> You don't have to pull it then nuvexport it.
>>
>> Run nuvexport as a script locally on the box where the recording is,
>> output the file to the same box to a directory that's in a storage
>> group.
>>
>> Now you have the transcoded file available from within mythweb.
>>
> Sorry I should have added, then do a rsync from the portable box to
> the storage group directory when you want to take recordings
> elsewhere.
>

Matt

Just to let you know.....

I run a backend that has 4 physical therefore 12 virtual DVB-T and 4
physical therefore 8 virtual DVB-S(2) tuners, that one box feeds
assorted frontends and laptops around the house, it's used by the kids
constantly. Many programs are automatically transcoded (after they've
been advert edited using either a remote control or on screen) and put
into the library.  The library is currently running at almost 7TB of
movies and programs.  The kids can copy any of the transcoded files to
their local laptops from mythweb in a couple of keystrokes and as the
transcoded file has a filename like 'The
Deep.S01E05.episodename.720p.mkv' it's a lot easier for them to
understand rather then 10940_20100829205700.mpg (which would have been
the original recording file).  The transcodes are done on the local
network by machines other then the master backend, the most nuvexport
transcodes I've had running at one time was about 9 or 10 over three
different boxes.

I do have a script setup to do flash on the fly but don't use it as I
agree with you the quality is rubbish, but good h264 stuff is
impossible to tell from source recordings IMHO and at usually about
20% of the original filesize (I would accept action movies and sports
probably 30% of the original filesize to maintain quality).


More information about the mythtv-users mailing list