|Movkit DVD Ripper Pro :: Lame(MP3) Encoder Settings
constant Bitrate: LAME creates an output mp3 in
which every frame has a constant bitrate.
average Bitrate: LAME chooses a bitrate in the
near of the mean bitrate for every frame, taking into account how
many bits it takes to encode a particular frame.
variable Bitrate: lets LAME encode every frame
with a bitrate that stays between the minimum and maximum
Bitrate / mean Bitrate / min. & max.
Bitrate: lets you set the bitrate or bitrate range the
LAME encoder should use.
Variable Bitrate Settings
VBR Method: lets you select the algorithm LAME
will use for variable bitrate encoding.
new: the new VBR algorithm; recommended to use
old: old VBR algorithm
VBR Quality: the quality to use for VBR. Lower
values yield to better quality.
enforce minimum Bitrate: LAME enforces the
minimum bitrate, which is normally violated for passages of music
with absolute silence.
write "VBR Info" tag: when using VBR, LAME can
write a special info tag at the start of the mp3 file. The tag
contains various infos about the encoder settings, as well as a
frame bitrate histogram. VBR Info tag aware players can correctly
seek and compute playing times when this tag is written. Note that
the Info tag is omitted when using nogap encoding. The VBR Info tag
was previously called Xing tag.
free format Bitstream: normally LAME produces a
mp3 bitstream where every frame has a certain bitrate. To override
this and use any bitrate you wish, check this box. Only available
for constant bitrate (CBR).
Note: most portable mp3 player cannot handle a
free format bitstream mp3 file!
Samplerate: lets you specify the output
frequency of the mp3 file. As this frequency is tied to the MPEG
type, you also may get another MPEG type.
Note: some players cannot handle MPEG2.5!
Note: choosing 48 kHz for ripped CD wave files
(which normally have 44.1kHz sample rate) slows down encoding and
decreases quality, due to resampling.
Algorithm Quality: lets you choose the quality
(and speed) of the LAME encoder. At bigger quality values, some
algorithms are switched off, which results in higher speed, but
produces less quality. If unsure what to take, choose algorithm
quality 2, the default.
Channel Mode: lets you choose the channel
Stereo: every channel is encoded separately,
although LAME may spend more bits on a harder to encode
Joint Stereo: the two channels are compared and
only differences in both channels are encoded. This saves some bits
that can be used for better quality. Recommended when the audio
file has little stereo separation.
Force Mid/Side: this forces LAME to use Joint
Stereo on every frame in the mp3 file, even when it may not make
Mono: LAME mixes all channels to one and only
encodes this one.
prepend RIFF WAVE Header: when checked, writes
a RIFF WAVE Header before the mp3 file, the output file extension
is ".wav". The resulting mp3 compressed wave file can be used in
various applications (such as VirtualDub) that only can use wave
files for input.
mark as original: marks the output file as
mark as copyrighted: marks the output file as
error protection: turns on CRC error
protection. It will add a cyclic redundancy check (CRC) code in
each frame, allowing to detect transmission errors that could occur
on the MP3 stream. However, it takes 16 bits per frame that would
otherwise be used for encoding, and sound quality will be slightly
strict ISO bitstream: when set, LAME will
enforce the 7680 bit limitation on total frame size. This results
in many wasted bits for high bitrate encodings but will ensure
strict ISO compatibility. This compatibility might be important for
disable bit reservoir: disables LAME's internal
bit reservoir when set. Each frame will then become independent
from previous ones, but quality will be lower.
use lowpass filter: enables lowpass filtering
of input files. Cutoff Frequency is specified in Hz. As one
normally cannot hear higher frequencies, no bits are used for those
disable all filters: tells the encoder to use
full bandwidth and to disable all filters. By default, the encoder
uses some highpass filtering at low bitrates, in order to keep a
good quality by giving more bits to more important frequencies.
Increasing the bandwidth from the default setting might produce
ringing artefacts at low bitrates. Use with care!
disable ATH: disables any use of the ATH
(absolute threshold of hearing) for masking. Normally, humans are
unable to hear any sound below this threshold. Disabling use of
this feature might be usefull for music recorded at extremely low
only use ATH: this option causes LAME to ignore
the output of the psy-model and only use masking from the ATH
(absolute threshold of hearing). Might be useful at very high
bitrates or for testing the ATH.
lower the ATH: lower the ATH (absolute
threshold of hearing) by n dB. Normally, humans are unable to hear
any sound below this threshold, but for music recorded at very low
level this option might be useful.
Other Encoder Settings
disable temporal masking effect: disables the
psychoacoustic model option when checked
disable short blocks: when checked, LAME encodes
all frames using long blocks only. This could increase quality when
encoding at very low bitrates, but can produce serious pre-echo
Copyright 锟?2008, MovKit
Working with Movkit DVD Ripper