[mythtv-users] HD Choppy or Jerky

Stephen P. Villano stephen.p.villano at gmail.com
Sat Feb 1 23:42:43 UTC 2014


On 2/1/14, 6:26 PM, Hika van den Hoven wrote:
> 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
> --
>
> _______________________________________________
>
I've occasionally had problems with cat5 running longer gigabit runs,
haven't had any problems with cat5e though.
I also tend to stay with hard wire, rather than stranded.


More information about the mythtv-users mailing list