[mythtv-users] avidemux2 command line? nuv -->> DVD
John P. Mitchell
john at cepros.com
Sat Aug 21 16:30:43 EDT 2004
> On Friday 20 August 2004 07:27 pm, Chris Petersen wrote:
>> > So how is Myth keeping the audio and video in sync then?
>> That's apparently part of the magic of the nuv container format. Beyond
>> that, I don't know.
> Right. .nuv has per-frame timestamps for both audio and video and bits to
> compensate for slightly inaccurate sound card clocks. Both of these are
> really needed to keep a/v sync for software encoding. .avi assumes that
> sound and video are a constant rate, never drifting, never varying.
> mythtv-users mailing list
> mythtv-users at mythtv.org
Thanks for filling us in.
I looked at the mythtranscode source code, and wondered if that was
what was going on. I am begining to see the problem with what "us"
users are asking for when it comes to exporting without re-encoding.
So, during playback code must be constantly computing deltas (I think I
was looking at this in the source code) in the audio/video timestamps
post decoding and dropping video frames to sync with the audio. Is that
right? Otherwise it seems like the audio would be nasty to listen to if
you where dropping it.
Is this an issue if the TV card has an audio device and you capture
from that instead of the sound card input? Is this the same for a video
encoder like the PVR-250? Still looking for a way to painlessly export
my Star Trek episodes to a video format I can use on other platforms.
If I have to throw money at a hardware solution, I guess that would not
be to bad.
John P. Mitchell <john at cepros.com>
Email Sticker: My Boss is a Jewish carpenter
http://www.GoboLinux.org | User #00010110
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