[mythtv] [mythtv-commits] Ticket #2429: Autodetect video scan is confused by 1080i recordings
Thomas Börkel
thomas at boerkel.de
Thu Sep 21 05:45:43 UTC 2006
HI!
Isaac Richards wrote:
> For instance, see NVP::AutoDeint(VideoFrame *frame).. It's only going to flip
> between interlaced/progressive after a couple frames of the opposite type to
> what's current have been seen, instead of on the actual frame that needs it.
> That'll lead to a couple frames of interlaced content being displayed as
> progressive, etc..
I have identified 4 cases here (Bob deinterlacer, DVB-C, SD, PAL, Germany):
1. Autodetect says "I"
Everything's fine, like in 0.19.
2a. Autodetect says "P"
Forcing to "I" seems not to improve the picture, but it does not hurt
either.
2b. Autodetect says "P"
Scrolling text looks bad. Forcing to "I" fixes this.
3. Autodetect switches between "I" and "P"
Every couple of seconds(!), it switches between "I" and "P". In the
moment of "I", scrolling text looks OK, in the moment of "P", it looks
bad. Forcing to "I" fixes this.
I have to investigate 2a further, but it looks like (at least in my case
and one other with DVB-S that I know of) even a global force to "I"
setting (like force aspect ratio) would improve things.
Thomas
More information about the mythtv-dev
mailing list