[mythtv-users] 1920x1080 transcode adds "grey bar"
viznut at charter.net
Sat Nov 10 01:30:01 UTC 2007
|> |Randall Hopper wrote:
|> |> When Myth transcodes 1920x1080i programs to MPEG-4, it incorrectly
|> |> adds a "grey bar" at the bottom of the transcoded video.
|> I'd be happy if it mythtranscode just encoded black lines instead of grey
|> ones (if it had to encode them at all).
|> Displaying 16:9 transcoded video on a 4:3 TV results in a nasty gray line
|> running through the middle of the display. But black I could live with --
|> totally ignorable.
|Through the middle? I thought it would be at the bottom, where it would
|probably be in the overscan area of a CRT TV.
Yes, though the middle. Here's the catch: we're fitting a 16:9 signal
1920x1080) into a 4:3 display. So we've got 25% of the height of
the 4:3 tube that's not being used. This makes the top and bottom of the
16:9 signal run through the middle of the display -- not anywhere near the
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