[mythtv] codec that deals best with badly synced video
Thu, 7 Nov 2002 23:05:07 -0800 (PST)
> From a discussion on the mjpeg list it was mentioned that vcr's
> typically have horrible video sync which will usually give encoders a
> fit, resulting in high cpu usage and/or a/v sync problems or dropouts.
> The problem I experience is that every 20-30 seconds or so I get an
> audio dropout and a video hiccup and then a second or two later the 2
> get in sync again.
I know this may be out in left field, but this wouldn't have anything to
do with DF vs. NDF or a timecode issue would it? It's my understanding
that VHS doesn't really lay down timecode. I forget the formula, but I
think that with DF you would drop 18 frames over the first 9 minutes, do
nothing on the tenth minute, then continue. So, after 20 minutes you
would need to have dropped 36 frames (or 1 second +06) and after 30
minutes you'd need to drop 1 second +24 (or almost 2 seconds). Don't know
if this even factors into the whole mix or not.
Anyone know how standard broadcast, digital broadcast, and PVRs record?
DF or NDF?