Question about MeGUI and encoding the credits at a lower bitrate.

[mob]

I see there is an option in MeGUI (at the preview window after you load the AVS script) to set the credits starting frame.

I have a couple of questions about this:

Lets say I calculated the whole movie's bitrate to be 920kbps in order give me a 700mb X264 rip (700mb being my target size).

When I set the credits starting frame, the credits will be encoded at a lower bitrate. But how will that affect my target size?

Will the main movie still be at 920kbps giving me a size smaller than 700mb? or will MeGUI adjust it to a higher bitrate to compensate for the lower credits bitrate and give me my 700mb taget size?

How does this work?

And also, what bitrate are the credits encoded at?

thanks :)

[Doom9]

But how will that affect my target size?It will have no effect. And the credits will be encoded at the fixed quantizer you can configure "Credits quantizer".
Or if you want to specify a bitrate instead, don't configure the credits, but instead use the zone management where you can chose between a fixed quantizer and a bitrate for each zone (credits / intro are nothing more than zones in fixed quantizer mode).

[mob]

(credits / intro are nothing more than zones in fixed quantizer mode).

Awesome. That's good to know. I always wondered what that "Zones" thing was for :D

So in other words what you are saying is that I don't have to worry about calculating two different bitrates (one for the movie and one for the credits) in order to make sure I get the exact size I want?

So all the calculations take place "behind the scenes"?

I'm confused about how MeGUI calculates this info.

I'm assuming it knows that when I set the bitrate for 920kbps then its for the whole movie (including credits). It then calculates this and relizes that I want a 700mb filesize. Then when I tell it to lower the bitrate on the credits, it will do so and at the same time encode the main movie at a higher bitrate than 920 in order to give me the 700mb size I wanted.

I hope I'm on the right track.

Now lets say I wanted to use the Zones, like you mentioned above. Would I have to set two zones (movie/credits) and calculate everything manually? or would I only have to set one zone only for the credits and MeGUI does the rest?

:confused: :confused:

[Doom9]

So in other words what you are saying is that I don't have to worry about calculating two different bitrates (one for the movie and one for the credits) in order to make sure I get the exact size I want?Wasn't the answer that using credits will have no effect on your final size answer enough? All encoders megui use automatically compensate for zones (of course, if you declare one zone at a fixed quantizer, your bitrate will most likely not be reached.. but that's like driving in a wall at full speed.. you just don't do that).

You NEVER EVER have to calculate anything.. imagine having to calculate bitrates in function of zones.. it's pretty much impossible (you can't say X frames at Quantizer 5 = a certain number of KBs.. that varies).. that's why encoders compensate directly.

[mob]

Alright, I think I am understanding how it works now.

thanks for replying so fast :)