Grass Valley PROFILE FAMILY v.2.5 - Manual (Page 225)

Manually Editing a Configuration File
Profile Family 225
- For audio codecs:
input level, output level, window size
If you don’t specify parameters, the default values are used. You can
override the defaults in the .cfg file, or by using the API calls. Acceptable
values for these parameters are shown in Table 13
LastEncoded
Line The number of total encoded lines is the
difference between the first and last encoded
lines, and must be a multiple of 16. In 525/60
total encoded lines is typically 240; in
625/50, total encoded lines is typically 288.
The last encoded line must not exceed 263
(525/60) or 311 (625/50). The first encoded
line is inclusive, meaning it is actually an
encoded line, but the last encoded line is
exclusive, meaning that the line specified is
not actually encoded. 261 (525/60)
311 (625/50)
Table 13. Audio Parameters
Parameter Acceptable Values Default
input level From 0.0 (full attenuation) to 1.0 (no
attenuation) 1.0
output level From 0.0 (full attenuation) to 1.0 (no
attenuation) 1.0
window size Number of audio fields to play during video
still frame operations. 1
Table 12. MPEG Encoder Parameters