How to do 100% comp test?

[Kent Wang]

I understand this has something to do with the SelectRangeEvery() line. Most likely, I'd change it to SelectRangeEvery(1,14). This however is giving me some very small CT values with "The Last Don." Then again, I'm having other CT problems with this particular title.

[SiXXGuNNZ]

you coudl always(if you have the space) do a 100% full one pass to see how big the file will be at 100%, and then figure out how many cd's type of audio you wanna use from the results

[manono]

Hi-

If it's This Movie (http://us.imdb.com/Title?0118381), then it's nearly 4.5 hours long and full screen. No wonder you're having trouble compressing it. I don't know what you've tried to get the compression test percentage up, but I think I'd try for 4 CDs at 512x384 resolution, and even that might not be enough. So maybe put on one of the denoising filters to get it more compressible.

Most likely, I'd change it to SelectRangeEvery(1,14).

You don't want to do that. Leave it at SelectRangeEvery(280,14). That encodes 14 frames out of every 280 frames throughout the movie (5%). So it gives you a good cross section of the whole movie which you can then use to figure the resolution and file size you want to use.

[Kent Wang]

Yes, that is the film. My actual problem is that the CT value shows that is way too compressible. Odd, eh?

[manono]

Hi-

My actual problem is that the CT value shows that is way too compressible.

Usually it's the other way around-more people complain about their movies not being compressible enough. There are lots of things you can do if it's too compressible (which would be percentage figures above, say, 80%). Use fewer CDs, use a higher resolution, use better quality audio, or the AC3 track, use a sharper resizer (such as LanczosResize), knock off any denoising filters you might be using.

[Kent Wang]

Ha! Figured it out. You can indeed play with this line all you want and the AviSynth doesn't indicate that there's any restrictions with it, but if it samples too much because 1) the film is very long, so even a 10% sample samples a lot and/or 2) you set the first argument to too small, then you will receive an incredibly small CT value (too compressible). Like running 10% on "The Last Don," it indicated that I could fit the whole 4 hour film onto half a CD.

So, sounds like a bug with either a Gordian Knot or AviSynth.