Fe2_codec_vp6alpha, Fe2_vp6a_alpha_bitrate, Fe2_vp6a_alpha_max_q – Google Flix Engine Linux Reference Manual User Manual

Page 61: Fe2_vp6a_2pass_min_section, Fe2_vp6a_2pass_max_section, 2 define documentation

5.15 VP6 with Alpha

5.15.2

Define Documentation

5.15.2.1

#define FE2_CODEC_VP6ALPHA

Codec name for use with

Definition at line 56 of file vp6_alpha.h.

5.15.2.2

#define FE2_VP6A_2PASS_MAX_SECTION

Alias for

maximum section datarate

This value is given as a percentage. The highest datarate, i.e., FE2_VP6_2PASS_MAX_SECTION% ×
FE2_VP6_BITRATE

, that can be streamed, and also the highest datarate that the encoder will allow, no

matter how difficult the section is.

Note:

Default: 400

Definition at line 202 of file vp6_alpha.h.

5.15.2.3

#define FE2_VP6A_2PASS_MIN_SECTION

Alias for

minimum section datarate

This value is given as a percentage. The lowest datarate, i.e., FE2_VP6_2PASS_MIN_SECTION% ×
FE2_VP6_BITRATE

, that the encoder will allow for any section, no matter how easy the section is. This

value is used to prevent difficult sections from stealing too many bits from easy sections.

Note:

Default: 40

Definition at line 196 of file vp6_alpha.h.

5.15.2.4

#define FE2_VP6A_ALPHA_BITRATE

Compressed bitrate of the alpha channel in kbit/s.

Note:

Default: 68 (15% of default 448kbps)

Definition at line 74 of file vp6_alpha.h.

5.15.2.5

#define FE2_VP6A_ALPHA_MAX_Q

Maximum quantizer for the alpha channel.

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