[mythtv-users] Black blocks in video after CBS Buffalo (WIVB) adds first subchannel on new encoder

Ian Evans dheianevans at gmail.com
Mon Oct 23 15:11:45 UTC 2017

On Oct 23, 2017 10:59 AM, "Peter Bennett" <pb.mythtv at gmail.com> wrote:

On 10/23/2017 10:43 AM, Ian Evans wrote:

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

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.

VDPAU High quality is what I've used for years. Did a clean install of
Xubuntu just over a week ago, so part of me wonders if it could be that or
the new encoder the station engineer mentioned to me. I'm still leaning
towards that as I'm pretty sure I'm just seeing it on this station.
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