From Steven M. Schultz [EMAIL PROTECTED] on 19 Dec 2003:
On Fri, 19 Dec 2003 [EMAIL PROTECTED] wrote:
Ok. I noticed that for some chapters on the DVD, the average bitrate
reported by mplex was almost 50% of the max bitrate! What does this
mean?
Could you please comment on this? If
On Sat, 20 Dec 2003 [EMAIL PROTECTED] wrote:
Ok. I noticed that for some chapters on the DVD, the average bitrate
reported by mplex was almost 50% of the max bitrate! What does this
Could you please comment on this? If the avg is 50% of the max, does it
mean that I can afford to
On Thu, 2003-12-18 at 20:23, Steven M. Schultz wrote:
You can set the bitrate to 9000 kbits/sec but with a high '-q' the
encoder will only use a fraction of the maximum bitrate. Lower -q
and watch the encoder come closer to the maximum rate.
You set the maximum bitrate and then adjust -q so
On 19 Dec 2003, Florin Andrei wrote:
You mean that for whole movies ( 1 hour) or for smaller scenes?
For the movie as a whole. Shorter scenes will, as you have seen,
run up against the limit and there's nothing wrong about that.
The guidline often is given as 20% but
From Steven M. Schultz [EMAIL PROTECTED] on 18 Dec 2003:
You set the maximum bitrate and then adjust -q so that the Average
is ~10% lower than the Peak rate.
Ok. I noticed that for some chapters on the DVD, the average bitrate reported by mplex
was almost 50% of the max bitrate!
On Fri, 19 Dec 2003 [EMAIL PROTECTED] wrote:
Ok. I noticed that for some chapters on the DVD, the average bitrate
reported by mplex was almost 50% of the max bitrate! What does this mean?
Ah, I see my posting made it out - I never saw it come around.
After discarding 80 to 90%
[a footnote:]
...
This particular movie is black and white so the chroma is killed with
'y4mshift -M' (sets U and V to 128).
...
mpeg2dec -s -o pgmpipe foo.vob | \
pgmtoy4m -i t -a 10:11 -r 3:1001 | \
y4mshift -M | \
y4mscaler -v 0 -S option=sinc:8 -O
In trying to make a VBR MPEG1, there is a tradeoff between higher filesize/bitrate vs.
quality.
To get the same visual quality (i.e. no artefacts, no halo around text, etc), is it
preferable to increase the bitrate or reduce the -q parameter to mpeg2enc (i.e.
increase quality factor)?
I just
On Thu, 18 Dec 2003 [EMAIL PROTECTED] wrote:
In trying to make a VBR MPEG1, there is a tradeoff between higher
filesize/bitrate vs. quality.
That's always true - it's not VCD specific (and it sounds like you
are creating a XVCD).
To get the same visual quality (i.e.
