[mythtv-users] Concert footage and video artifacts

[Jay Foster]

On 11/17/2016 12:40 PM, Ian Evans wrote:
> This isn't a pressing issue, but more a "just curious, learn something 
> everyday" type of thing.
>
> Sometimes when watching a music awards show or concert footage, the 
> picture can go crazy if there's a quick change of lighting or fast 
> strobing effects. Suddenly the picture goes from the crystal clear 
> bronze glow of the Zildjian cymbals and chrome on the drum set to a 
> blocky visual worthy of an 8-pixel video game emulator.
>
> Is that how it's coming from the source? Is it a temporary 
> deinterlacing issue caused by elves? Will the right video card prevent it?
>
> Curious minds want to know. :-)
>
>
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That is compression artifacts.  Usually due to insufficient bandwidth to 
encode the video.  This is typically introduced by the local 
broadcaster, most of which choose quantity (i.e., more subchannels) over 
quality (i.e., a higher bit rate).

Jay
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