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MediaPortal 1
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Watch / Listen Media
Television (MyTV frontend and TV-Server)
Upgraded my TV server now have live tv stuttering/pixelation
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<blockquote data-quote="mm1352000" data-source="post: 1165730" data-attributes="member: 82144"><p>Hmmm, I expected that might be the case. In some ways I feel like the network test you were previously running is a bit unusual - I guess like stress testing the NIC - and it may not be representative of "real world" situations.</p><p></p><p></p><p>You mean the network transfer speed?</p><p>How much of a slow down are we talking about here?</p><p></p><p></p><p>1600 is still quite high and would still give me cause for concern.</p><p></p><p></p><p>This is not unexpected. Proximity and connectivity (eg. Ethernet vs. powerline vs. Wifi) shouldn't make any difference. Rather, it is the connection bandwidth (eg. 1 Gb/s) that is the key. The more data the NIC has to handle, the more demand it will place on deferred procedure calls (DPCs). I would assume you see less of an impact (and slower transfer) with the laptop because its Wifi connection is slower (802.11n 150 or 300 Mb/s???).</p><p></p><p></p><p>Yeah, as above - the key is the bandwidth/bitrate that the NIC has to handle.</p><p></p><p></p><p>Here I assume the transfer bandwidth is limited (compared to the full 1 Gb/s theoretical bandwidth) by the write speed of the file server's storage subsystem. Lower transfer bandwidth means lower DPC demand, and that's why you "only" see 3000us latency instead of the 16000us you saw with the network test between the same machines.</p><p></p><p></p><p>Yep, that all makes sense in the context of the proposed explanation.</p><p></p><p></p><p>I'm 99.999% certain you'd have run into the same problem even if you hadn't updated MediaPortal. This is a system level problem, and all applications including MediaPortal will be affected by it... though obviously the effect on MediaPortal appears more significant/severe due to the fact that real time streaming is time/latency-sensitive.</p><p></p><p></p><p>Please keep in mind what I said in my previous post. In particular: though it appears like the NIC driver is responsible for the problems, it is still possible that it's actually another driver or drivers. That's why I recommended the process of elimination.</p><p></p><p>Another idea: assuming you prove (or are already convinced) that the NIC driver is at fault, you can also try older versions of the driver. In some cases newer is not better. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /></p><p></p><p></p><p>Ummm... well, I can't say that I hold much hope of that. In most cases (GPU being one big exception) the guts of most W10-compatible drivers will be the same as those for W7 (and even Vista). If there are no fundamental changes in the driver then it's unlikely that the problem would go away. Simple logic really.</p></blockquote><p></p>
[QUOTE="mm1352000, post: 1165730, member: 82144"] Hmmm, I expected that might be the case. In some ways I feel like the network test you were previously running is a bit unusual - I guess like stress testing the NIC - and it may not be representative of "real world" situations. You mean the network transfer speed? How much of a slow down are we talking about here? 1600 is still quite high and would still give me cause for concern. This is not unexpected. Proximity and connectivity (eg. Ethernet vs. powerline vs. Wifi) shouldn't make any difference. Rather, it is the connection bandwidth (eg. 1 Gb/s) that is the key. The more data the NIC has to handle, the more demand it will place on deferred procedure calls (DPCs). I would assume you see less of an impact (and slower transfer) with the laptop because its Wifi connection is slower (802.11n 150 or 300 Mb/s???). Yeah, as above - the key is the bandwidth/bitrate that the NIC has to handle. Here I assume the transfer bandwidth is limited (compared to the full 1 Gb/s theoretical bandwidth) by the write speed of the file server's storage subsystem. Lower transfer bandwidth means lower DPC demand, and that's why you "only" see 3000us latency instead of the 16000us you saw with the network test between the same machines. Yep, that all makes sense in the context of the proposed explanation. I'm 99.999% certain you'd have run into the same problem even if you hadn't updated MediaPortal. This is a system level problem, and all applications including MediaPortal will be affected by it... though obviously the effect on MediaPortal appears more significant/severe due to the fact that real time streaming is time/latency-sensitive. Please keep in mind what I said in my previous post. In particular: though it appears like the NIC driver is responsible for the problems, it is still possible that it's actually another driver or drivers. That's why I recommended the process of elimination. Another idea: assuming you prove (or are already convinced) that the NIC driver is at fault, you can also try older versions of the driver. In some cases newer is not better. ;) Ummm... well, I can't say that I hold much hope of that. In most cases (GPU being one big exception) the guts of most W10-compatible drivers will be the same as those for W7 (and even Vista). If there are no fundamental changes in the driver then it's unlikely that the problem would go away. Simple logic really. [/QUOTE]
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MediaPortal 1
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Watch / Listen Media
Television (MyTV frontend and TV-Server)
Upgraded my TV server now have live tv stuttering/pixelation
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