How to gauge Quality on first pass to do a 2nd pass? Without Gknot?

[Brother Darrell]

As this implies..I would like to be able to do a quality check with the 1st pass log to determine if resize would help or not...(just like Gknot does with Stats files, you know...70% gives you a good rip)...How do I do this with divx 5 ? Without Gknot?

[khp]

AFAIK GKnot's divx5 compressability check works by running a 1 pass quality based encoding @ 100%, on parts of the movie, and comprare the resulting filesize with the desired filesize.

Judging the quality by the first pass log file is a bit more difficult.
In principle you could calculate the average quantizer by looking at the logfile, and calculate the corrosponding filesize by adding up the numbers labeled total (I think). And guesstimate the average quantizer for your desired filesize.

But IMHO this belongs in the 'too much work to bother' bin.

[cornetet]

I've always done the Gknot Compressibility Test at 5%.

I then adjust my settings so that I'm in the 70% to 85% range with a Bits/(Pixel*Frame) between 0.30 to 0.35

This method has always yield perfect DivX5 movies for me... am I'm really sceptical on quality.