[MPlayer-users] slightly confused by mencoder output
rcooley at spamcop.net
Mon Sep 12 06:39:32 CEST 2005
On Sun, 11 Sep 2005 22:08:25 +0200
The Eye <mhellwig at gmx.at> wrote:
A height of 530 is nonsensical. Since the content is interlaced, you
can only capture at the card's full heigh (576 PAL / 480 NTSC) or
exactly half (or 1/4 1/8 etc).
Use "-vf scale=x:y" if you want a different output height.
Your output dimentions should be exact multiples of 16.
> now, what I'm confused about is a: why the 2 "Building audio filter
> chain" lines? b: Why the two "ODML: Aspect information ..." lines?
Well, a highly technical explanation about the internals of mplayer
would explain this, but I think that might leave you more confused.
The simple answer is, these are often just informational messages,
designed to help diagnose problems.
> And while the file is running, over the course of 40 minutes, the
> audio drifts _considerably_ away from the video. Looks like more than
> a second near the end.
Well, with any a/v problems with mplayer, try with "-mc 0", "-mc 0.1" "-
mc 10", and "-autosync 30".
If that doesn't solve it, it's probably clock drift, caused by capturing
audio using your sound-card.
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