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<blockquote data-quote="mm1352000" data-source="post: 1197498" data-attributes="member: 82144">No need to apologise. I look forward to the results, whenever you find the time to do it. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" />I would suggest to keep in mind that h.265 can be used to encode [approximately] the same quality with half the bandwidth. In other words: we could say the complexity of h.265 is double that of h.264. Therefore to me it seems plausible that the hardware might only be able to handle half the bandwidth.Anyway, it seems that we have different opinions. Such is life. I freely admit I could be wrong; it's just an idea. The DXVA Checker testing should show the truth. I think this is an assumption. What we know for sure is that the error message (&quot;unknown error&quot;) is coming from one of the components in the DirectShow graph. The options are:<ul>
<li data-xf-list-type="ul">EVR renderer (and so also GPU driver)</li>
<li data-xf-list-type="ul">DirectSound renderer (and so also audio output driver - either AMD or Realtek) 
</li>
<li data-xf-list-type="ul">LAV video decoder</li>
<li data-xf-list-type="ul">the source/splitter (I'm not 100% sure which one is being used)</li>
</ul>Feel free to try anything that you think is sensible. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" />If you think it could be a LAV problem, feel free to try other codecs.Also feel free to try different splitters. In fact, you might want to try enabling the &quot;manually select source and splitter filters&quot; option to ensure that LAV splitter is being used.</blockquote>

[QUOTE="mm1352000, post: 1197498, member: 82144"] No need to apologise. I look forward to the results, whenever you find the time to do it. :) I would suggest to keep in mind that h.265 can be used to encode [approximately] the same quality with half the bandwidth. In other words: we could say the complexity of h.265 is double that of h.264. Therefore to me it seems plausible that the hardware might only be able to handle half the bandwidth. Anyway, it seems that we have different opinions. Such is life. I freely admit I could be wrong; it's just an idea. The DXVA Checker testing should show the truth. I think this is an assumption. What we know for sure is that the error message ("unknown error") is coming from one of the components in the DirectShow graph. The options are: [LIST] [*]EVR renderer (and so also GPU driver) [*]DirectSound renderer (and so also audio output driver - either AMD or Realtek) [*]LAV video decoder [*]the source/splitter (I'm not 100% sure which one is being used) [/LIST] Feel free to try anything that you think is sensible. :) If you think it could be a LAV problem, feel free to try other codecs. Also feel free to try different splitters. In fact, you might want to try enabling the "manually select source and splitter filters" option to ensure that LAV splitter is being used. [/QUOTE]

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