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MediaPortal 1
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Poor quality recordings, PCTV 290e DVB-T/DVB-T2.
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<blockquote data-quote="Woody[UK]" data-source="post: 1123950" data-attributes="member: 151367"><p>Hi,</p><p>If you are interested, I found <a href="https://software.intel.com/en-us/articles/power-management-states-p-states-c-states-and-package-c-states" target="_blank">this</a> article by Taylor Kidd which explains Intel power management quite well. Although I did experience the same symptoms on my AMD PC with 'Cool and Quiet' enabled, I would expect Intel power management to be similar.</p><p></p><p>When I was testing with TV Server I was only recording. I did make note of the paths under 'Rec to' as I was going to test with timeshift at different paths, but I did not.</p><p></p><p>The signal meter shows between 50dBuV and 60dBuV with the splitter fitted.</p><p></p><p>I do not own a powered splitter. The splitter <a href="http://www.labgear.co.uk/category/network-taps-splitters/broadband-splitters/broadband-2-way-compact-splitter-power-pass-all-ports/1006/1037/77/" target="_blank">I used</a> was one I believe to be of reasonable quality. It has the ability to 'pass' power through the ports.</p><p></p><p>I have tested the hard disk with TV Server (C6 disabled). I set a schedule to record one HD channel, then to add another HD channel every five minutes until recording four channels at the same time. Except for the first recording, which dropped 2 packets right at the start. All of the recordings passed the continuity check with no errors. I think this proves the hard disk is capable of recording multiple channels simultaneously.</p><p></p><p>At first I thought a temporal pattern would be difficult to analyse because of the format that xperf logs data and because I checked the recordings for errors after they have completed. Also, watching the stream live greatly reduced the number of errors. I remembered TV Server TsWriter.log records continuity errors with a time stamp. So I used Windows Performance Monitor (perfmon.exe) to create a User Defined Data Collector Set. I specified to collect Performance Counter data from LogicalDisk, Processor and USB. I set a sample interval of 1 second and to save the data as Comma Separated (CSV). I then scheduled the Data Collector to start 1 minute before a recording. Analysing the data I observed the following.</p><p></p><p>TV Server had very slightly lower CPU use than TV Scheduler Pro.</p><p>Processor Information (0,#)\% Idle Time</p><p>C6disabled TVSchedulerPro (average) 98.66</p><p>C6disabled TVserver (average) 99.05</p><p>C6enabled TVSchedulerPro (average) 98.40</p><p>C6enabled TVserver (average) 98.79</p><p></p><p>There were less 'interrupts/sec' with TVServer and C6 enabled.</p><p>Processor Information (_Total)\Interrupts/sec</p><p>C6disabled TVSchedulerPro (average) 574</p><p>C6disabled TVserver (average) 598</p><p>C6enabled TVSchedulerPro (average) 556</p><p>C6enabled TVserver (average) 424</p><p></p><p>There were no regular 'USB(PCTV 290e)\Control Data Bytes/Sec' with TVServer (C6 enabled or disabled)</p><p>There was around 267 bytes every 10 seconds with TV Scheduler Pro (C6 enabled or disabled)</p><p></p><p>Only with TVServer and C6 enabled did 'USB(PCTV 290e)\Iso Packet Errors/Sec' occur.</p><p>These errors correspond exactly with TV Server TsWriter.log continuity error.</p><p></p><p>At least disabling C6 seems to minimise TV Server continuity errors. Though I do wonder what TV Scheduler Pro does different.</p><p></p><p>Thanks</p></blockquote><p></p>
[QUOTE="Woody[UK], post: 1123950, member: 151367"] Hi, If you are interested, I found [URL='https://software.intel.com/en-us/articles/power-management-states-p-states-c-states-and-package-c-states']this[/URL] article by Taylor Kidd which explains Intel power management quite well. Although I did experience the same symptoms on my AMD PC with 'Cool and Quiet' enabled, I would expect Intel power management to be similar. When I was testing with TV Server I was only recording. I did make note of the paths under 'Rec to' as I was going to test with timeshift at different paths, but I did not. The signal meter shows between 50dBuV and 60dBuV with the splitter fitted. I do not own a powered splitter. The splitter [URL='http://www.labgear.co.uk/category/network-taps-splitters/broadband-splitters/broadband-2-way-compact-splitter-power-pass-all-ports/1006/1037/77/']I used[/URL] was one I believe to be of reasonable quality. It has the ability to 'pass' power through the ports. I have tested the hard disk with TV Server (C6 disabled). I set a schedule to record one HD channel, then to add another HD channel every five minutes until recording four channels at the same time. Except for the first recording, which dropped 2 packets right at the start. All of the recordings passed the continuity check with no errors. I think this proves the hard disk is capable of recording multiple channels simultaneously. At first I thought a temporal pattern would be difficult to analyse because of the format that xperf logs data and because I checked the recordings for errors after they have completed. Also, watching the stream live greatly reduced the number of errors. I remembered TV Server TsWriter.log records continuity errors with a time stamp. So I used Windows Performance Monitor (perfmon.exe) to create a User Defined Data Collector Set. I specified to collect Performance Counter data from LogicalDisk, Processor and USB. I set a sample interval of 1 second and to save the data as Comma Separated (CSV). I then scheduled the Data Collector to start 1 minute before a recording. Analysing the data I observed the following. TV Server had very slightly lower CPU use than TV Scheduler Pro. Processor Information (0,#)\% Idle Time C6disabled TVSchedulerPro (average) 98.66 C6disabled TVserver (average) 99.05 C6enabled TVSchedulerPro (average) 98.40 C6enabled TVserver (average) 98.79 There were less 'interrupts/sec' with TVServer and C6 enabled. Processor Information (_Total)\Interrupts/sec C6disabled TVSchedulerPro (average) 574 C6disabled TVserver (average) 598 C6enabled TVSchedulerPro (average) 556 C6enabled TVserver (average) 424 There were no regular 'USB(PCTV 290e)\Control Data Bytes/Sec' with TVServer (C6 enabled or disabled) There was around 267 bytes every 10 seconds with TV Scheduler Pro (C6 enabled or disabled) Only with TVServer and C6 enabled did 'USB(PCTV 290e)\Iso Packet Errors/Sec' occur. These errors correspond exactly with TV Server TsWriter.log continuity error. At least disabling C6 seems to minimise TV Server continuity errors. Though I do wonder what TV Scheduler Pro does different. Thanks [/QUOTE]
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