>On Wed, 15 Jun 2005, Trent Piepho wrote:
>
>> On Wed, 15 Jun 2005, Steven M. Schultz wrote:
>> > mpeg2enc -D 10 -G 15 -b 6400 -c --dualprime-mpeg2 -E -10 -f 8 -q 2
>> > -K tmpgenc -4 1 -2 1 -o $N.m2v
>> > ----------------------
>
>> You are specifying a bitrate of 6400 bits per SECOND. Not bits per frame.
>
> Used mpeg2enc for long?
>
> If you have then you know the '-b' value is in units of kbits/sec
> (kbit = 1000).
>
> Or did you forget that?
>
> Who said anything about bits/frame? Certainly not I. There were
> sizes given but not in any context of bits/frame.
Whoa there, cowboy! Let's put that pistol back on the table. :)
I think that what Trent was saying was:
"If mpeg2enc is told to encode N seconds of material with a target
bitrate of M bits/second... then the resulting file should be
roughly the N*M bits long, no matter what it is encoding."
One would expect the _quality_ of the encoding to vary though. With the
24fps input, mpeg2enc should have more room in the same file to store
real information. With the telecined input, mpeg2enc will squander
some of its limited bit reservoir in encoding those redundant fields.
-m
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