[mythtv-users] Help creating a Not a Frequently Asked Questions page?

Friedrich Clausen fred at derf.nl
Wed Oct 1 05:43:04 UTC 2008


Sorry for top-posting but I just wish to say that these questions and
answers are a great idea and should go on the Wiki. Not sure about the
name of "NOTAFAQ", maybe something like a "Before You Start" Wiki page
but the name is not the big issue. I think there are valid points on
the QA list that need to get out to people investigating a potential
MythTV system.



On Wed, Oct 1, 2008 at 1:19 AM, Dan Ritter <dsr-myth at tao.merseine.nu> wrote:
> On Wed, Oct 01, 2008 at 12:10:48AM +0200, Kent Boortz wrote:
>> ------------------------------------------------------------------------------
>> Q: Do I need hardware compression? In what situations will I *not* need it?
>> In most situations, you need hardware compression. In a very simple setup
>> you can get away without it, and let the CPU do the job for you. [Not much
>> of an answer.....]
> If you are recording from an analog source, you can use a
> software encoding tuner which uses your CPU. It's very cheap.
> You can also use a hardware encoding tuner, which won't load
> your CPU much -- likely about 2%. If you have (or want) multiple
> tuners, that's the way to go.
> If you are recording from a digital source, the question is
> meaningless. You can do a software transcode later to move the
> video into a different format (DVD, AVI, DIVX, for your iPOD,
> etc.)
>> ------------------------------------------------------------------------------
>> Q: I want to have 4 tuners, what is the best option, PCI or external
>>    tuners with USB?
>> >From a compatibility standpoint, expected trouble.....
>> CPU load.......
>> Cost.......
>> [Yes, I want to know?]
> USB and ethernet-attached tuners are usually the easiest to set
> up. That said, there's not that much to do for PCI tuners, and
> the difficulties in FireWire tuners are mostly your cable
> company's fault.
> If you are using a PCI tuner, it's probably best to avoid a
> VIA-based motherboard.
>> ------------------------------------------------------------------------------
>> Q: Can I connect one or more external USB TV dongles to an USB hub?
> Yes, but you'll need to watch the overall bandwidth of that
> connection. USB isn't as good as FireWire at allocating
> bandwidth fairly, which is one of the reasons that new
> motherboards often have six or ten or a dozen USB ports.
>> ------------------------------------------------------------------------------
>> Q: In practice, how many cards/channels can I record at the same time on
>>    one single back-end?
>> The DVB-T stream is already compressed, so storing it is just about PCI/USB
>> bandwidth and how fast you can store it on disk. As a rule of thumb....
> As a rule of thumb, one disk is good for two streams. If you
> have four disks, you can probably record 6-7 programs and watch
> another one.
> Analog non-compressing tuners will chew up more CPU time than
> disk bandwidth.
> -dsr-
> --
> http://tao.merseine.nu/~dsr/eula.html is hereby incorporated by reference.
> You can't defend freedom by getting rid of it.
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users

More information about the mythtv-users mailing list