[mythtv-users] transcode command line to prevent 1080i grey bars?

[Nick Rout]

On Sat, Jul 19, 2008 at 4:10 PM, Tom Dexter <digitalaudiorock at gmail.com> wrote:
> I've been trying basically forever to figure out how to create DVDs
> from HD DVB recordings that actually have audio and video in sync.
> I've ended up dropping this awful project countless times out of
> frustration...sometimes I think I'm more likely to build a nuclear
> reactor out of balsa wood...:D.
>
> I've seen suggestions here about demuxing with projectx.  I've gotten
> much farther doing that, and it does seem to correct sync issues.
> However now I'm running into the issue where transcode interprets
> 1080i as 1920x1088 and creates that grey bar at the bottom.  Note that
> this is the transcode command like program, not mythtranscode.
>

Is this an error in parsing some test it does on the video?

I note that 1080 is not divisible by 16, but 1088 is. Is transcode
rounding up to the nearest multiple of 16?

Might you be better to crop 4 lines off the top and bottom to take it
down to a multiple of 16? (1080-4-4=1072, which is divisible by 16).

I really don't know, but I do know that all the guides say to
transcode to frame sizes that are divisible by 16.