[MPlayer-users] Is more than 3 pass really beneficial or am I just paranoid about quality?
rcooley at spamcop.net
Thu Apr 21 00:20:58 CEST 2005
On Wed, 20 Apr 2005 11:25:44 -0400
Giacomo Comes <comes at naic.edu> wrote:
> My experience is that for mpeg1 and mpeg2
> You need only 1 pass.
> I use 3 different set of libavcodec options
> and the PSNR of 2 pass encoding is always worst than 1 pass.
The PSNR may be higher, but that doesn't mean it will look good. With a
single-pass, you're very likely to see most complex/high-motion
scenes looking horrible.
That's at medium/low bitrates, BTW. At high bitrates, there's so
many bits to go around, the extra pass doesn't make much difference.
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