[MPlayer-users] Re: Should vqscale be used for first pass?

[Jonathan Rogers <jonner@xxxxxxxxxx>]

[Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
Attila Kinali wrote:
> I'm not an expert on this field but afaik it comes from that you have
> to rate the images to have a proper value on which you can decide
> which number of bits you can use for a particulary image.
> Now, if you use vbr for the first pas, you get "size" values that depend
> on other frames too.
> But, this works only if the value used for vqscale is more or less about
> the actual encoded one. So, if you use a value that is far away from
> that what actualy will be the bit rate per pixel you'll get better
> values with vbitrate as it's bit/pixel is nearer to the actualy encoded.

Are you saying that I should use "vqscale=3" for the first pass if I 
expect the average quantizer to be about 3 for the second pass? When 
I've used vqscale in the past, I've always used 2 and the bitrate has 
far exceeded the desired one. I'll try a value of 3 next time.

Jonathan Rogers

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