Compressibility test: 0.997

[Portent]

I'm trying to make a DVD of Scratch. It's my first time doing this so I may not know all the tricks. Anyway, I've got divx 5.02 and I'm following the divx5 guide from this site. Everything was OK until I got to the compressibility part. It returned a value of 0.997 which would suggest that I can't compress this thing. This seems weird. The DVD is 29.97fps, Interlaced (according to DVD2AVI), 16:9, and so on. I figure I must be doing something wrong here, so can anyone shed some light on this? Thanks a lot.

Eddy Cooper

[jeremymacmull]

what was 0.997 if it was the value next to the % value then this is fine

id suggest a re read of the guides for that basically u need to re read about deinterlacing and about the compresibility check

should not be to bad as u are on the right track

JEREMY

[Portent]

Well the way I have it set now, the movie will be ~1938kbps and the bits/(pixel*frame) value is 0.299. So with a compressibility test of 0.997, this gives a percentage of 30%. I was under the impression that this was a very high bitrate, and high bits/(pixel*frame) value and was expecting a percentage higher than this. I want a high quality movie so should I be bumping up the bitrate here?

[Portent]

Just did the test again, this time without IVTC, and got 1.022. WTF?

[jonny]

Can you give us more info on the movie length, type, resolution you are using, filters, number of cds ... ?

30% it's quite possible if the movie is hard and you are using high resolution and aggressive filters.

[Portent]

Question: When Gordian Knot does its compressibility test, does it use the divx5 settings that are already set in VirtualDub? I checked it out, and it was set for 2pass, 2nd pass, but that was the only thing out of the ordinary - no special stuff. I'll give it another try after returning the divx5 settings to default. Thanks,

Eddy Cooper

[jonny]

Gordian Knot set 2-pass first pass when it goes for compressibility check.
If you don't find this on VirtualDub, after making a comp. test, you are probably using DivX 5.0.3, that doesn't work with GKnot.

EDIT: ops :rolleyes:, you are using 5.0.2! at this point the thing it's strange!

[manono]

Hi-

Also, to get a correct compress test result when you IVTC (which you should do), you have to change the frame rate in the lower left corner to 23.976fps. Your percentage will rise by 25%. And you can lower the resolution by quite a bit. Or put on some Temporal/Spatial Filters to aid in the compressibility. Or use a softer resize. Or...