[MPlayer-users] vhq

[Ian]

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D Richard Felker III wrote:

> Is the first pass a live capture? If so you should use constant
> qscale=2 or even 1 for maximal quality. Otherwise reencoding at the
> second step will reduce quality quite a bit. There's no point in using
> vhq during this pass unless you have cpu time to spare...but if you do
> it could make the file somewhat smaller.

Yes it is - the frame rate dropped from 25 to 21 with hq, and I started 
dropping frames after about one minute.  qmax/qmin did not appear to 
slow anything down.  I'll try with just qscale as you suggest . . .

> Another approach you could try, but keep in mind this is BLACK MAGIC
> and may not work well at all... But if it does work it could save lots
> of time. Capture the first time vhq:vqscale=1:vpass=1, then use the
> log file from the capture to jump right into the second pass of the
> twopass process. Again this is not a recommendation, but something
> very experimental you could try, which *might* work.

I'll look in to this as well, but I agree it sounds "interesting". 
After all, the docs suggest that the bitrate _can_ be changed between 
passes, if I read them right.

Thanks,

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Ian Smith
Worst . . . signature . . . ever !

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