Doremi Rapid and Rapid-2x - Manual (Page 27)

4.7 Real-Time and Non-Real Time Capture
4.7.1 RAPID
When in Real-Time capture mode, a very high bandwidth of data in the hardware compressor
accelerator can be generated. Some frames that are extremely difficult to encode, such as
random noise, will overflow the hardware accelerator causing it to possibly crash. To avoid
crashes, a filtering process is done in real-time capture mode. This filtering might cause a
degradation of the quality of the resulting picture.
To keep the best quality possible, encode in “Non-Real Time” capture mode (see Figure 22
below). In this mode, the source must be set to run at less than 50% speed. If the “VTR
Control” (Video Tape Recorder) is selected, the application will automatically set the source at
48%. This will cause the RAPID-1X encoding process to be approximately half of “Real-Time”.
Audio cannot be captured in “Non-Real Time” Mode. The “Non-Real Time” capture mode has
been tested with HDCAM-SR. Test the equipment first to ensure that it will output proper
progressive frames in this mode and not repeat fields or interpolate (alter) frames.
4.7.2 RAPID 2X
“Non-Real Time” capture mode on the RAPID-2X is not necessary. The RAPID-2X encodes with
the best quality possible at “Real-Time” speed without having to slow down. This is possible due
to the fact that the RAPID-2X has an additional Dolphin DCI Card.
Note: The “Non-Real Time” capture mode on a RAPID 2X will be viewable, as well as, on the
RAPID. However, it is only usable on the RAPID.
Figure 22: Source Tab - HD-SDI Capture Field
RAP.OM.000960.DRM Page 27 Version 1.4
Doremi Cinema LLC
“Non-Real
Time”
Encoding
Capture