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<blockquote data-quote="morpheus_xx" data-source="post: 1251358" data-attributes="member: 48495">At the moment I can't think of more reasons why the plain DirectShow based playback inside MP2 does not work &quot;as good as others&quot;.But MP2 is much more complicated than a &quot;basic player&quot; (in comparision to MPC-HC), all the GUI rendering, video filters, background work and much more do need resources as well.I'd also like to see the impact of the experimental x64 version.So I'd suggest to test:<ul>
<li data-xf-list-type="ul">Disabling refresh rate changer, was reported to cause playback issues with 4k in other cases (settings -&gt; player -&gt; video player -&gt; refresh rate changer) 
</li>
<li data-xf-list-type="ul">Disabling video effect changer, always keep &quot;none&quot; (althought the default is &quot;none&quot; for everything &gt; 576p). This would rule out GPU pressure due to complex shading logic(settings -&gt; player -&gt; video player -&gt; video effect changer)</li>
<li data-xf-list-type="ul">Checking default/vsync/maxperf render modes if they make a difference (F10 to enable stats, F11 to toggle between modes) 
</li>
<li data-xf-list-type="ul">See if the X64 version works better. Just to know. I will add and test build to this post.</li>
</ul>Notes to the attached MP2-Version (x64):<ul>
<li data-xf-list-type="ul">TsReader does not work in x64, this means no playback of .ts and LiveTV!</li>
<li data-xf-list-type="ul">Subtitle rendering is not working! (maybe this has an impact as well? We post-process video frames before rendering them...) 
</li>
<li data-xf-list-type="ul">There are 2 .exe contained, MP2-Client.exe is the &quot;normal&quot; 32 bit version, while &quot;MP2-Client (x64).exe&quot; starts as 64 bit process</li>
<li data-xf-list-type="ul">Just extract this archive to any folder (but do not overwrite your local installation due to missing features!) and run 64 bit version for testing 4k playback</li>
</ul></blockquote>

[QUOTE="morpheus_xx, post: 1251358, member: 48495"] At the moment I can't think of more reasons why the plain DirectShow based playback inside MP2 does not work "as good as others". But MP2 is much more complicated than a "basic player" (in comparision to MPC-HC), all the GUI rendering, video filters, background work and much more do need resources as well. I'd also like to see the impact of the experimental x64 version. So I'd suggest to test: [LIST] [*]Disabling refresh rate changer, was reported to cause playback issues with 4k in other cases (settings -> player -> video player -> refresh rate changer) [*]Disabling video effect changer, always keep "none" (althought the default is "none" for everything > 576p). This would rule out GPU pressure due to complex shading logic(settings -> player -> video player -> video effect changer) [*]Checking default/vsync/maxperf render modes if they make a difference (F10 to enable stats, F11 to toggle between modes) [*]See if the X64 version works better. Just to know. I will add and test build to this post. [/LIST] [U]Notes to the attached MP2-Version (x64):[/U] [LIST] [*]TsReader does [B]not [/B]work in x64, this means no playback of .ts and LiveTV! [*]Subtitle rendering is [B]not [/B]working! (maybe this has an impact as well? We post-process video frames before rendering them...) [*]There are 2 .exe contained, MP2-Client.exe is the "normal" 32 bit version, while "MP2-Client (x64).exe" starts as 64 bit process [*]Just extract this archive to any folder (but do not overwrite your local installation due to missing features!) and run 64 bit version for testing 4k playback [/LIST] [/QUOTE]

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