Visual Circuits Mantis MC, Руководство пользователя

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Encoding Requirements and Recommendations
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7. Files should be no less than 4 MB in size. If there are files are
smaller than 4 MB, use an editor to combine them into a larger
file that is at least 4 MB in size.
SD Encoding Recommendations
1. Resolution:
• 704 x 480 or 720 x 480 in NTSC
• 704 x 576 or 720 x 576 in PAL
2. Closed GOP (Group of Pictures) with an “I-frame” every 15
frames is recommended.
3. The recommended audio bit rate is 384 Kbps and a sampling
rate of 48 kHz.
Before encoding an entire project, play back the test files
using the original source tapes to confirm audio level. This
allows for calibration of the encoding system by obtaining a
standard audio level.
4. Program stream files should have one end code (00 00 01 b9)
at the very end of the file. While the Mantis can handle files
without end codes, it is a good encoding practice to include
one.
5. The bit rate can affect the size and transferability of the files.
Following are the recommended bit rates for various types of
video content:
Bit Rate Video Content
4 Mbps Good quality with low motion
6 Mbps Good quality with typical motion
8 Mbps Good quality with high motion
10 Mbps High quality with demanding content
Table 2. SD Bit Rate Encoding Recommendations