[mythtv-users] HD Choppy or Jerky

[Hika van den Hoven]

Hoi Mike,

Sunday, February 2, 2014, 12:01:50 AM, you wrote:

> On 01/02/14 22:45, Dick Steffens wrote:
>> On 02/01/2014 12:13 PM, Doug Lytle wrote:
>>> Dick Steffens wrote:
>>>> CAT-5 cable, and 10/100 Ethernet. I don't use the wireless side of the
>>>> router.
>>> You'll really want to be gigabit for HD.
>>
>> Are you saying that I need gigabit Ethernet between my HDHomeRun Prime and the
>> machine doing the recording, or playing the program live?
>>
>> Would it work to have gigabit between the HDHomeRun Prime and the machine doing
>> the recording, then copy the recorded file to the machine connected to the TV
>> and have a stable playback?
>>
>> Very rarely do we watch live TV anymore. The Super Bowl, tomorrow, is probably
>> the only thing we plan to watch live. Mostly we record what we want to see and
>> then watch it later. If I set up a backend connected by gigabit Ethernet to my
>> HDHomeRun Prime to do the recording, but transferred those recordings over
>> 10/100 Ethernet to the playback machine, should that work? It would be very
>> impractical to run better than CAT-5 cable to where the TV sits. Or can gigabit
>> Ethernet work on CAT-5 cable. (I haven't kept up to date on cable. Last I knew
>> there was CAT-5e cable, but I don't have any of that in my house.)
>>
> You /can/ use Cat-5 cable for Gigabit, I do it myself at one or two points
> within my networks. The issue is the quality of the cable. What you might get
> away with using, say, a commercially-made patch cable might not work where you
> have runs around rooms/ducting/etc with sharp turns and indifferent termination
> at the sockets.

> There is also Cat-6 cable, but despite having a larger number Cat-5e is
> perfectly adequate for Gigabit (something shop assistants don't seem to be aware
> of).

> You /can/ run HD over 100 Mbit ethernet but a lot will depend on your setup.
> Buffer sizes in your switches, for example. The bit rate of your video, many
> other factors. Gigabit just makes HD that bit easier to handle without having to
> tune everything.



I've never had problems with cat5. The main difference is that 10/100
only uses 4 of the 8 wires (pair 1,2 up and pair 3,6 down) Gbit uses
all 8. To preserve quality prevent bending the cable. every pair is
twisted around each other to prevent interference. Bending might
disturb this twisting. Also for longer stretches you best have cable
with solid wiring, which is less flexible than twined cable, but has
lower resistence.

Tot mails,
  Hika                            mailto:hikavdh at gmail.com

"Zonder hoop kun je niet leven
Zonder leven is er geen hoop
Het eeuwige dilemma
Zeker als je hoop moet vernietigen om te kunnen overleven!"

De lerende Mens
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