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I’m aware of techniques to give the encoder freedom to ramp up bitrate for relatively complex sequences, but this has the consequence of inflating the overall bitrate compared to whatever was desired for the more typical scenes.

Is it possible to loosen the bounds on the encoder, to give it more degrees of freedom with bitrate, over predefined intervals?

Giacomo1968
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Louis Waweru
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1 Answers1

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There is the x264 Zones parameter:

x264 --fullhelp
...
    --zones <zone0>/<zone1>/...  Tweak the bitrate of regions of the video
                            Each zone is of the form
                                <start frame>,<end frame>,<option>
                                where <option> is either
                                    q=<integer> (force QP)
                                or  b=<float> (bitrate multiplier)

Use it like so: --zones 400,500,crf=10

I think this describes it best.

Mathias
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