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How to get credits-mode working
-------------------------------
You have to adjust the information in 'xvid2.cfg' as this:
Common information:
# use credits at the beginning of the movie (0 = no, 1 = yes)
credits_start = 1
# set XXX/YYY to begin/end frame of the start credits
credits_start_begin = XXX
credits_start_end = YYY
# use credits at the end of the movie (0 = no, 1 = yes)
credits_end = 1
# set XXX/YYY to begin/end frame of the end credits
credits_end_begin = XXX
credits_end_end = YYY
The frame numbers are relative to your encoding range; so if you start
encoding at frame 100 and your credits start at frame 150, you have to
set 'credits_start_begin = 50' !
Credits mode:
Via 'credits_mode' you can select from several modes for credit
handling, each using different values:
VBR_CREDITS_MODE_QUANT:
# Use a fixed quant for all credit frames
# use this when doing VBR_MODE_FIXED_QUANT
credits_fixed_quant = 20
# use this in all other VBR_MODEs...
# ...for I-frames
credits_quant_i = 20
# ...for P-frames
credits_quant_p = 20
Annotation: If and only if credits_quant_i does not equal
credits_quant_p, then I-frames appear in credits. All other modes do not
generate I-frames within credits. This conflicts with this comment:
/* We only care about Keyframes when not in credits */
Maybe this does also need to be fixed, but I did never try this combination.
VBR_CREDITS_MODE_RATE:
# Use only 'credits_quant_ratio' % of the full encoding rate as
# encoding rate for credit frames, e.g. with encoding rate 700kpbs
# this uses 140kps for the credits
credits_quant_ratio = 20
VBR_CREDITS_MODE_SIZE:
# Use a fixed size XXX/YYY for all opening/ending credit frames together
credits_start_size = XXX
credits_end_size = YYY
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