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MediaPortal 1
MediaPortal 1 Talk
initial support for Hauppuage HD-PVR
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<blockquote data-quote="ajp8164" data-source="post: 416996" data-attributes="member: 64375"><p>I feel like I've read every post in these forums on stuttering tv video and I have tried a number of things but I just can't get the 1080i stream from the HDPVR to play without stutter.</p><p></p><p>Things I tried (probably not comprehensive and I did try somethings in combination:</p><ul> <li data-xf-list-type="ul">usertsp=no</li> </ul> <ul> <li data-xf-list-type="ul">EVR (s/w render was crumby quality and used 90%+ cpu)</li> </ul> <ul> <li data-xf-list-type="ul">Dynamic refresh rate (including various combinations of available options)</li> </ul> <ul> <li data-xf-list-type="ul">TsReader Options - Don't drop discontinued packets</li> </ul> <ul> <li data-xf-list-type="ul">Various bitrate settings in TME (I changed this from 4 up to 13.5 and never saw much of a difference - certainly no worse at 13.5 so throughput does not appear to be an issue)</li> </ul> <ul> <li data-xf-list-type="ul">Playing around with ATI driver settings</li> </ul><p></p><p>If I lower the resolution of my STB to 720p it looks awesome, as good as the input for sure. So two questions</p><p></p><p>(1) why can't I get 1080i to perform well? these are some possible reasons:</p><ul> <li data-xf-list-type="ul">Crumby ArcSoft decoder</li> </ul> <ul> <li data-xf-list-type="ul">Mismatch in frame rates between the output of the HDPVR at 1080i (25Hz) and my chip set (not sure, max is 85Hz) and my TV (60Hz) -> this seems the most likely to me</li> </ul> <ul> <li data-xf-list-type="ul">Something else goofy in DirectShow?</li> </ul><p></p><p>System throughput does not appear to be the (main) problem because I can play the ts buffer in WMP afterward and it plays without stutter.</p><p></p><p>Hey - does MP support DX10? Would there be any advantage of DX10 over 9c?</p><p></p><p>(2) What am I really missing by going from 1080i to 720p (1280x720) when my TV is 1366x768 LCD? The input format is 93% of the native screen resolution - not too much scaling going on here, right?</p><p></p><p>CROPPING:</p><p>Something else I notice too is that sometimes I get noisy video lines at the top and/or bottom - I set MP to crop 10 lines off the top and bottom - anyone else notice this?</p><p></p><p>EMPTY RECORDING:</p><p>When I perform a manual record I get zero byte files. What's up with that?!</p><p></p><p>Would love to try 4TR - looks like a project though, huh?</p><p></p><p>Overall I am very happy with the results so far (I don't mind all the tinkering). Thanks to all for sharing your experiences; hopefully we can collect all of this and create a nice wiki entry at some point for this very cool HDPVR...</p></blockquote><p></p>
[QUOTE="ajp8164, post: 416996, member: 64375"] I feel like I've read every post in these forums on stuttering tv video and I have tried a number of things but I just can't get the 1080i stream from the HDPVR to play without stutter. Things I tried (probably not comprehensive and I did try somethings in combination: [LIST]usertsp=no[/LIST] [LIST]EVR (s/w render was crumby quality and used 90%+ cpu)[/LIST] [LIST]Dynamic refresh rate (including various combinations of available options)[/LIST] [LIST]TsReader Options - Don't drop discontinued packets[/LIST] [LIST]Various bitrate settings in TME (I changed this from 4 up to 13.5 and never saw much of a difference - certainly no worse at 13.5 so throughput does not appear to be an issue)[/LIST] [LIST]Playing around with ATI driver settings[/LIST] If I lower the resolution of my STB to 720p it looks awesome, as good as the input for sure. So two questions (1) why can't I get 1080i to perform well? these are some possible reasons: [LIST]Crumby ArcSoft decoder[/LIST] [LIST]Mismatch in frame rates between the output of the HDPVR at 1080i (25Hz) and my chip set (not sure, max is 85Hz) and my TV (60Hz) -> this seems the most likely to me[/LIST] [LIST]Something else goofy in DirectShow?[/LIST] System throughput does not appear to be the (main) problem because I can play the ts buffer in WMP afterward and it plays without stutter. Hey - does MP support DX10? Would there be any advantage of DX10 over 9c? (2) What am I really missing by going from 1080i to 720p (1280x720) when my TV is 1366x768 LCD? The input format is 93% of the native screen resolution - not too much scaling going on here, right? CROPPING: Something else I notice too is that sometimes I get noisy video lines at the top and/or bottom - I set MP to crop 10 lines off the top and bottom - anyone else notice this? EMPTY RECORDING: When I perform a manual record I get zero byte files. What's up with that?! Would love to try 4TR - looks like a project though, huh? Overall I am very happy with the results so far (I don't mind all the tinkering). Thanks to all for sharing your experiences; hopefully we can collect all of this and create a nice wiki entry at some point for this very cool HDPVR... [/QUOTE]
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initial support for Hauppuage HD-PVR
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