Google Flix Engine Linux Reference Manual - Manual (Page 66)

60 Flix Engine Linux Module Documentation
Attention:
Valid for CBR only
Definition at line 172 of file vp6_alpha.h.
5.15.2.21 #define FE2_VP6A_STREAM_PREBUFFER
Alias for FE2_VP6_STREAM_PREBUFFER .
Seconds of preload that are necessary before starting playback.
The buffer is used to maintain a consistent datarate and minimize playback interruption.
Note:
Default: 6
Attention:
Valid for CBR only
Definition at line 178 of file vp6_alpha.h.
5.15.2.22 #define FE2_VP6A_TEMPORAL_DOWN_WATERMARK
Alias for FE2_VP6_TEMPORAL_DOWN_WATERMARK .
Codec parameter for temporal down watermark percentage.
Specifies the percentage of the datarate buffer remaining below which the encoder is allowed to start drop-
ping frames. Only used if
FE2_VP6_TEMPORAL_RESAMPLING is enabled.
Note:
Default: 20
A larger percentage will make it more likely frames will be dropped to achieve the requested
FE2_-
VP6_BITRATE . The converse is also true.
Definition at line 166 of file vp6_alpha.h.
5.15.2.23 #define FE2_VP6A_TEMPORAL_RESAMPLING
Alias for FE2_VP6_TEMPORAL_RESAMPLING .
Codec parameter for temporal resampling.
In particularly difficult regions, if enabled, the encoder will drop frames to achieve the target the data rate.
The value of
FE2_VP6_TEMPORAL_DOWN_WATERMARK determines the percentage of the datarate
buffer below which the encoder is enabled to start dropping frames.
Note:
Default: Bits per pixel dependent
Attention:
Setting FE2_VP6_RC_MODE to CBR_1PASSControl or CBR_2PASSControl will unconditionally
set this value to 1. In this case adjusting FE2_VP6_TEMPORAL_DOWN_WATERMARK may im-
prove results.
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