On Wed, 3 Sep 2003, Markus Plail wrote:
> > If not what are the advantages of vbr anyways?
>
> You don't care about the advantages, if it's possible under linux ;-)
>
The big advantage of VBR encoding (which is enabled with the
-q option to the encoder) is that it maximizes the amount of
data that can be placed on media.
> IMHO the main advantage with 2-pass encoding is, that you can hit a
> target bitrate quite easily without playing with -q and -b until you
Very true. I just use '-b' as an upper bound on the filesize,
if the encoding produces a smaller file that's fine (and the space
can be used to place additional files on the media or perhaps
even an additional movie trailer clip)
> I wonder if it would be (easily) possible to create a filter like the
> Avisynth SelectRangeEvery() filter. This way one could encode let's say only
> a tenth of a movie in a tenth of the time to get suitable parameters
> for the specific movie and then encode the whole thing with that
> values.
>
> For those who don't know what it does:
> SelectRangeEvery(100,10) selects 0-9, 100-109 and so on...
There's no need to create such a filter since that capability
already exists.
If you're using the smilutils to create the video and audio
data then simply use the "-o offset' and '-f count' options:
smil2yuv -o 100 -f 10 file.dv | ...
With the lav* programs it is similar:
lav2yuv -o 100 -f 10 file.eli | ...
Works great.
Cheers,
Steven Schultz
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