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MediaPortal 1
MediaPortal 1 Talk
Automatic Refreshrate Changer
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<blockquote data-quote="Scythe42" data-source="post: 554774" data-attributes="member: 95833"><p>stop video playback, change refresh rate over display properties, change back to player application (the actual solution), play movie. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite4" alt=":mad:" title="Mad :mad:" loading="lazy" data-shortname=":mad:" /></p><p></p><p>Of course this is not acceptable for a media center application.</p><p></p><p>MP used the same functions as layed out by MS for driver properties (at least for Win7). The functions itself are not a problem they work smooth (not the one in the stats renderer - different issue). But somehow an already running DirectShow graph or running applications with a custom EVR presenter are not informed by Windows over a new refresh rate unless the Application is refocused. This is the best explanation I can come up with right now why Alt+Tab solves the issue anytime under any player if it shows up.</p><p></p><p>With MP we let handle DirectShow the vsync. So we can provide a frame early to the renderer and let it handle the exact timimng. This is what MS recommends with Vista and higher when using a custom EVR presenter.</p><p></p><p>I am working on various workarounds (one after another) to see which one can solve the issue of stuttering playback after a refresh rate change:</p><p>- use a different full screen mode similar to XBMC</p><p>- MP handles vsync and not DirectShow</p><p>- automatic application re-focus after RR change</p><p>- and some more crazy ideas...</p><p></p><p>Please check <a href="https://forum.team-mediaportal.com/watch-edit-videos-104/stutter-after-refresh-rate-change-71311/" target="_blank">https://forum.team-mediaportal.com/watch-edit-videos-104/stutter-after-refresh-rate-change-71311/</a> for ongoing discussion. I release patched DLLs for testing there as I cannot reproduce the problem on demand on my machine which makes it very hard for me to work on this problem.</p><p></p><p>I am currently on vacation and do not have access to by development rig until next week when I can continue to work on the described problem.</p></blockquote><p></p>
[QUOTE="Scythe42, post: 554774, member: 95833"] stop video playback, change refresh rate over display properties, change back to player application (the actual solution), play movie. :mad: Of course this is not acceptable for a media center application. MP used the same functions as layed out by MS for driver properties (at least for Win7). The functions itself are not a problem they work smooth (not the one in the stats renderer - different issue). But somehow an already running DirectShow graph or running applications with a custom EVR presenter are not informed by Windows over a new refresh rate unless the Application is refocused. This is the best explanation I can come up with right now why Alt+Tab solves the issue anytime under any player if it shows up. With MP we let handle DirectShow the vsync. So we can provide a frame early to the renderer and let it handle the exact timimng. This is what MS recommends with Vista and higher when using a custom EVR presenter. I am working on various workarounds (one after another) to see which one can solve the issue of stuttering playback after a refresh rate change: - use a different full screen mode similar to XBMC - MP handles vsync and not DirectShow - automatic application re-focus after RR change - and some more crazy ideas... Please check [URL="https://forum.team-mediaportal.com/watch-edit-videos-104/stutter-after-refresh-rate-change-71311/"]https://forum.team-mediaportal.com/watch-edit-videos-104/stutter-after-refresh-rate-change-71311/[/URL] for ongoing discussion. I release patched DLLs for testing there as I cannot reproduce the problem on demand on my machine which makes it very hard for me to work on this problem. I am currently on vacation and do not have access to by development rig until next week when I can continue to work on the described problem. [/QUOTE]
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