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<div class="moz-cite-prefix">On 10/23/2017 10:43 AM, Ian Evans
wrote:<br>
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<div dir="auto">Sorry, it's got nothing to do with the closed
captionings, which I don't use. This is not one large black
block but a randomly located sprinkling of picture breakup
across various areas of the screen. The blocks are quite tiny.</div>
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What is your playback profile? The new (as of January 2017) NBC
channel in Boston gives all sorts of video artifacts with VDPAU
decoding on my video adapters. By switching to standard decoding
everything was fine. I am now using standard decoding with VDPAU
rendering and that solves it.<br>
<br>
Peter<br>
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