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<blockquote data-quote="mm1352000" data-source="post: 1197081" data-attributes="member: 82144">Just to let you know what I'm thinking...I still think it may be a &quot;bandwidth&quot; problem, in the sense that the GPU's hardware acceleration has limits based on:<ul>
<li data-xf-list-type="ul">codec (MPEG 2, h.264, HEVC, VC-1 etc.)</li>
<li data-xf-list-type="ul">profile (main, high, high 10 etc.) 
</li>
<li data-xf-list-type="ul">bits per pixel (8 bit or 10 bit) 
</li>
<li data-xf-list-type="ul">resolution</li>
</ul>You may find that the GPU can accelerate decoding for 4k h.264 at 140 Mb/s, but the bit-rate limit for 4k HEVC may be lower than 140 Mb/s because decoding HEVC is harder than decoding h.264. The bit-rate limit for 10 bit may be lower than for 8 bit with the same codec and resolution. etc.You can find more information about such topics in places like this:<a href="http://forum.doom9.org/showthread.php?t=171219&amp;page=62" target="_blank">http://forum.doom9.org/showthread.php?t=171219&amp;page=62</a></blockquote>

[QUOTE="mm1352000, post: 1197081, member: 82144"] Just to let you know what I'm thinking... I still think it may be a "bandwidth" problem, in the sense that the GPU's hardware acceleration has limits based on: [LIST] [*]codec (MPEG 2, h.264, HEVC, VC-1 etc.) [*]profile (main, high, high 10 etc.) [*]bits per pixel (8 bit or 10 bit) [*]resolution [/LIST] You may find that the GPU can accelerate decoding for 4k h.264 at 140 Mb/s, but the bit-rate limit for 4k HEVC may be lower than 140 Mb/s because decoding HEVC is harder than decoding h.264. The bit-rate limit for 10 bit may be lower than for 8 bit with the same codec and resolution. etc. You can find more information about such topics in places like this: [URL]http://forum.doom9.org/showthread.php?t=171219&page=62[/URL] [/QUOTE]

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