[mythtv-users] UPnP Clients: MediaMVP HD or "New" AppleTV

[Devin Heitmueller]

On 3/9/11, Lawrence Houston <mythtv at greenfield.dyndns.org> wrote:
> Devin:
>
> On Wed, 9 Mar 2011, Devin Heitmueller wrote:
>
>> On Tue, Mar 8, 2011 at 8:07 PM, Lawrence Houston
>>>
>>>         What should I try next???
>>
>> Hi Lawrence,
>>
>> Sorry for the delayed response, I've been traveling on business.
>>
>> Sounds a bit like you might have a network bandwidth issue.  Are all
>> the hops between the MediaMVP-HD and the MythTV server 10/100 or
>> better?  Also, does the video just become choppy, or does it stop
>> entirely?  If it stops entirely, does the back button on the remote
>> successfully drop you back to the menu?
>
> Both the MediaMVP-HD and the MythTV Backend are Directly connected to the
> same 16 Port 10/100 Switch.  Telnetting into the MediaMVP-HD I can see the
> Kernel is reporting 100 Full-Duplex:
>
>     eth0: link up, 100Mbps, full-duplex, lpa 0x45E1
>
> The Video stops completely within a few Frame, the Audio remains Choppy
> and it "Intermittent" for a while after that.  Curiously the MediaMVP-HD
> is unable to "Resume" past this 10 Second "Wall"???
>
>> What type of video is this?  Are they livetv MPEG2 recordings, or some
>> other video hosted via MythVideo (such as Bluray rips)?
>
> My MythTV Backend has a pair of Hauppauge HVR-1600 Tuner Cards which use
> Hardware Encoding to generate MPEG2 Files and my understanding was the
> MythTV Backend simply records those Video Streams directly to the Disk...
>
>> It might also be worthwhile to copy one of the videos to a USB stick
>> and see if it still happens when playing off of USB, which will allow
>> us to rule out whether there is something strange about the video
>> itself, or whether we really are talking about some sort of uPNP or
>> networking issue.
>
> Copied a 1 Hour Show (2.2 GB) onto a 8 GB Kingston DataTraveller and I
> observed the same 10 Second "Wall" when playing from the USB Stick!!!
>
>> The more detail I can get on the nature of the problem, the better
>> chance I will have of being able to identify the issue.
>
> Does that suggest the HVR-1600 is Encoding MPEG2 Files which the
> MediaMVP-HD is unable to Play past the first 10 Seconds???  If so that
> could be a "Problem" since those are Hardware Encoders on the HVR-1600
> Tuner Cards (one is a Model 1183 and one is a Model 1181) and I doubt
> there is little or no Tweaking Possible???
>
> Lawrence Houston  --  (mythtv at greenfield.dyndns.org)

Ok, now we're getting somewhere.  Your USB test rules out the UPNP
client as well as a network issue.

Let me dig around here for an HVR-1600 trace. Are you testing with
traces from the analog tuner, or are these ATSC/ClearQAM captures?

Thanks,

-- 
Devin J. Heitmueller - Kernel Labs
http://www.kernellabs.com