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[MPlayer-users] Re: Should vqscale be used for first pass?
[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.
Re: [MPlayer-users] file size falls short of 700MB for multi pass, Moritz Bunkus, 2003/06/24