Limiting bitrate for trailers

General questions or discussion about HandBrake, Video and/or audio transcoding, trends etc.
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Metasyntactic
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Joined: Wed Feb 13, 2008 6:07 pm

Limiting bitrate for trailers

Post by Metasyntactic » Wed Feb 13, 2008 9:52 pm

A long long time ago, i used to use some compression tool (whose name i've totally forgotten) that let you specify where the credits of a movie started so that you could limit bandwidth in those regions. Useful for dropping the quality down very low for this unimportant part so that the rest of the movie could benefit.

Is that possible with Handbrake? Is there any need for this sort of thing anymore, or is 'x264 - 2pass' fine at figuring this out on its own.

Thanks!

dynaflash
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Re: Limiting bitrate for trailers

Post by dynaflash » Wed Feb 13, 2008 10:08 pm

Metasyntactic wrote:is 'x264 - 2pass' fine at figuring this out on its own.
It does fine on its own.

maxidermy
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Joined: Thu Feb 14, 2008 6:59 am

Re: Limiting bitrate for trailers

Post by maxidermy » Sat Feb 16, 2008 11:23 am

with one pass encoding does HB limit bitrate at the start of movies at all?

jbrjake
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Re: Limiting bitrate for trailers

Post by jbrjake » Sat Feb 16, 2008 3:57 pm

You can do this in x264 by using zones. You can type them into the advanced x264 options field. You need to know the frame counts where the sections begin and end. It's not very well documented, you'll find the best info over at the doom9 forum -- as i recall, akupenguin laid out the format a couple months ago after he expanded zones to control more settings. For each section (segmented by beginning and ending frame numbers) you can set different bitrates and most other x264 options.

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