ADS Technologies USBAV-708 INSTANT VIDEOMPX, Руководство пользователя

Страница: 54 / 116

The
Guide
54
Pe
rfo
rm
a
nc
e/
Q
ua
lit
y
Sl
ow
es
t
Slowest performance/quality mode enables the
quality-optimized
Rate-Distortion algorithm,
designed to dramatically improve video quality at
low bitrates. Slowest mode will yield the
highest possible quality available but at
the expense of the longest encoding
duration.
The Rate-Distortion algorithm attempts to best balance bit spend against quality
gain by intelligently evaluating all of the possible outcomes of various decisions
made by the encoder.
QUICK GUIDE
Slowest
In Slowest mode the encoder uses the new Rate-Distortion algorithm to make
frame type decisions based upon the best balance of bit spend and quality
gain. Because of this the
Scene Change Threshold settings become
redundant and is ignored.
MV re-use is not permitted under Slowest mode.
QPel is unsupported in Slowest mode. If you have enabled both QPel and
Slowest mode the performance/quality mode will automatically default to
Standard mode when encoding begins.
Performance/Quality:
-pq <mode>
Mode is one of:
1 Fastest
5 Standard
64 Slow
192 Slowest