| Adaptive algorithm of bits allocation between frames within GOP.
This algorithm constantly works in the coder. |
| Single-pass VBR algorithm. It's recommended to use this option
while encoding full MPEG2 video streams, which meet the quality
requirements of DVD streams. This option is enabled using the
Advanced tab: BitRateControl->Variable BitRate = Yes. It's required
to specify three parameters: BitRateControl->Maximum Bitrate - to
specify max possible bitrate for the stream; BitRateControl->Minimum
Bitrate - to specify min bitrate for the stream; BitRateControl->
Average Bitrate - to specify medium bitrate for the stream, this
bitrate will be kept. |
| Detection algorithm of scene change in the stream. It's recommended
to use the option during encoding movies or clips with drastic
frames changes. This option is enabled using the Advanced tab:
Global->Scene Detection = Yes. This algorithm properly works if the
scene changes no more than once in two GOPs. When this option is
enabled, GOP will be purposely terminated and a new GOP will start
for better encoding quality of a new scene. |
| Selection algorithm of quantization scale, it's based on analysis
of DCT coefficients. This option should be always used. The option
is enabled using the Advanced tab: Global->Quant Algorithm = DCT based.
This algorithm reacts better to image encoding in comparison with the
standard one, when the image has blurring blocks and sharp edges |
Encoding of interlaced video. To support this mode, set the following
options:
- Global->Video Source = Interlace;
- Motion Estimation->Motion Compensation = Field. |
| Four search algorithms of motion vectors. The algorithm is specified
using the Advanced tab: Motion Estimation->Motion algorithm. The most
qualitative and slowest algorithm is Diamond Zonal. The fastest one is
Fast Predict Diamond Zonal. |
| To enable the alternative scanning algorithm for MPEG 2 streams.
The algorithm can be specified using the Advanced tab: Global->
Alternative Scanning = Yes. |
| Selection of video stream pre-filtering. It's recommended to use
this option to improve the quality of the encoded stream. The filter
is specified using the Adavanced tab: Global-->Pre-filter. You can
select from 3 space filters (Gauss, Blur, and Median) and one
interframe filter (Adaptive Kalman). Better results are achieved
using the adaptive Kalman filter. |
Typical compression times on a single-CPU Pentium II 600 MHz PC
are ~ 50 frames/sec for MPEG1 and 4 ~ 5 frames/sec intrelaced video
for MPEG2. |
