User`s manual

Reference Manual 79
Members
header
Header information about the structure.
target_bitrate
The desired average target bit rate of the encoded stream, in
bits per second (bps).
X 0: If Q>0, apply the variable bitrate control (VBR) using the
value of Q. If Q=0, no bitrate control algorithm is applied.
Bitrate will be determined by values of IQ, PQ, and BQ
provided by the user.
X >0: Apply constant bitrate control (CBR) using the value of
target_bitrate.
peak_bitrate
The highest bit rate allowed in the encoded stream, in bits per
second (bps). This parameter is only valid when applying con-
stant bitrate control (both Q and target_bitrate are greater than
0).
vbv_buffer
Specifies VBV buffer size. Video Buffering Verifier (VBV) is a
hypothetical decoder that is conceptually connected to the out-
put of the encoder. Its purpose is to provide a constraint on the
variability of the data rate that an encoder or editing process
may produce.
converge_speed
Specifies the converging speed of bit rate control process. Its
value range is [0, 100]. The larger the value, the faster the con-
verging speed.