Author Topic: zones: bitrate multiplier  (Read 1065 times)

Offline patrick

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zones: bitrate multiplier
« on: October 02, 2010, 11:29:46 AM »
When setting a bitrate multiplier for a zone in a multi-pass conversion, will the bitrate of the rest of the video be lowered or does the overall bitrate increase?

So if I convert --bitrate 1000 and half of the video has b=2.0, will the final bitrate be 1000 or 1500?

Offline patrick

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Re: zones: bitrate multiplier
« Reply #1 on: October 11, 2010, 04:55:07 AM »
I just tested and using zones to raise the bitrate in one zone, will lower in others so ABR won't change :(

Not too important, but complicates things a bit more, because I want to increase the bitrate of dark scenes, without touching others.

Offline sN1b3r

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Re: zones: bitrate multiplier
« Reply #2 on: October 11, 2010, 05:21:57 AM »
If you want to increase the bitrate on some parts without touching others, there is no point in using --bitrate in the first place. Use --crf instead, that will zone like you want to.

Offline Mr VacBob

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Re: zones: bitrate multiplier
« Reply #3 on: October 11, 2010, 08:33:07 AM »
Try increasing --aq-strength globally rather than messing with zone multipliers.