[mythtv] [mythtv-commits] Ticket #2429: Autodetect video scan is confused by 1080i recordings

Steven Adeff adeffs.mythtv at gmail.com
Thu Sep 21 12:26:43 UTC 2006

On 9/20/06, Jack Perveiler <perveilerj at yahoo.com> wrote:
> I recently asked David (original patch author) if maybe increasing the
> hysteresis would help with my problem channels, but he said that in his
> experiments some channels were just REALLY BAD with respect to this.  I.e. it
> was hundreds of consecutive frames wrong, not just a couple.  I know Curious
> George on digital PBS always detects as progressive for me, but I definitely
> get the banding (or whatever the correct term is) suggesting it's really
> interlaced.  Switching the video scan to "interlaced" corrects it.  It's
> possible it's really switching back and forth, but it's wrong the vast majority
> of the time.

I've seen this in my transcoding work. Some stations are horrible.
Here in Boston the "WB" (WLVI) was a pain to get any sort of IVTC work
done on, sometimes requiring manually going through hundreds of frames
to manually select the correct ones for removal.
CBS here is great though, absolutely perfect telecine, so nice to work with =D

I've noticed in pausing material from my PVR-150 that upon unpausing
the sync detection gets the frame order backwards, requireing manually
overiding the setting. Is this something I should post to TRAC? I
don't really know how to debug such a thing if noone else sees it

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