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

Michael T. Dean mtdean at thirdcontact.com
Tue Oct 24 10:40:38 UTC 2017

On 10/23/2017 03:21 PM, Ian Evans wrote:
> On Oct 23, 2017 3:04 PM, "Peter Bennett" wrote:
>     On 10/23/2017 11:11 AM, Ian Evans wrote:
>>     I'm still leaning towards that as I'm pretty sure I'm just seeing
>>     it on this station.
>     Perhaps you missed it in my email -  I am also seeing those
>     glitches with VDPAU on just one station. The other 500 or so
>     channels that I get are fine.
> Didn't miss it. Was just saying I briefly had a creeping doubt due to 
> my recent upgrade but as it's just this channel AND they have a new 
> encoder, it's probably them. :-)

But did you try changing your decoder to Standard?  It's quite likely 
their new encoder is doing things differently, but that doesn't mean 
it's doing things wrong.  It may well be that your decoder (VDPAU) may 
not handle their encoding properly.  You can still use VDPAU rendering 
even if you don't use VDPAU decoding. Just change the decoder in the 
Playback Profile to Standard and see if it works.  FWIW, I've been 
running with Standard decoding and VDPAU rendering ever since VDPAU went 
in specifically because some of my channels have artifacts when decoded 
with VDPAU.  So, if you happen to have channels/video that don't decode 
properly with VDPAU, and if you have a sufficiently-powerful CPU to use 
FFMPEG for decoding, using Standard decoding with VDPAU rendering gives 
you the best of both worlds--great decoding that doesn't show visual 
artifacts ("Just Works") /and/ the best video rendering available on 


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