550 MB undersized with 0.26

[BarnyGeroellheimer]

Hi,

yesterday I updated my GKnot installation from 0.23 to 0.26 and installed DivX 5.02 Pro.

My first try with the new version was not that successfull.
I encoded "Kiss of the Dragon", selecting 2 CD of 700 MB as target size in GKnot. The movie has a playtime of about 100 minutes.

I used B-Frames for encoding only, no Qpels, no gmc, no psycho, no audio encoding (I prefer to do that seperatly). I added the size of the MP3-File in the "Audio A" field on the Bitrate-Tab using the "Select"-Button. The MP3-File has about 100 MB.
Target-Resolution was 640x270. Movie is PAL.
GKnot calculated a Bitrte of 1916.
For encoding I used the Trim-Option to encode the credits seperatly.

The encoding resulted in a DivX-File (without sound) of 650 MB.
Together with the MP3-File I have about 750 MB, target was 1400 MB.

Is there something wrong with my installation, did I miss a parameter somewhere, or is there a problem with GKnot??

Barny

[FactorM]

take a look at this:

http://forum.doom9.org/showthread.php?s=&threadid=24584

[llemor]

Two CD's (1400 MB) for 100 minutes stream is an overkill.
Definitely, if you encode it at 1-pass quality based mode of 100% you will end up to an avi file size very much less than 1400 MB. DivX 5 cannot encode it lower than a quantizer of 2.0.

[manono]

Hi-

You don't mean 640x270, do you? You really mean 640x272, don't you?

And that movie is particularly compressible. It can easily be done for 1 CD.

[Beave]

Why don't you people make a compressebility test before thinking it is undersized? I don't get it.
I made one CompTest and put this movie with one AC3 and one 128 ABR Audio Track on one CD with great quality.

[N_F]

Originally posted by Beave
Why don't you people make a compressebility test before thinking it is undersized? I don't get it.
I made one CompTest and put this movie with one AC3 and one 128 ABR Audio Track on one CD with great quality.

Just curious: Why do you use 2 audio streams?

[j77]

probably a Director's Commentary or even a foreign language stream I suppose.

-J

[N_F]

Yeah, that makes sense. I got it in my mind that he had the same audio in different formats in two different streams which I just couldn't understand.

[Beave]

It's english and german. Sometimes a commentary as well.

[metrum_eng]

Originally posted by llemor
Two CD's (1400 MB) for 100 minutes stream is an overkill.


Overkill? Why not put a 100min movie on 2 CD’s for optimum quality? That should be our choice to make and the NEW divx 5.02 codec should allow us that option. When we specify a 2 CD encode @ 700MB/cd, we should at least be able to get an encode at approximately 1.3 gig, anything less than 1 gig is ridicules if we’re going for a target of 1.4 gig.

[llemor]

@ metrum_eng

The minimum bitrate that DivX 5 can use for optimum quality is 2. So, even you specify huge target file size, it cannot be attained once min. bitrate for excellent quality has been applied for that movie. To attain your target file size, perhaps you add some noise filters.;)

[Mac Sidewinder]

Why is everyone so obsessed with file size? So what if you didn't use every bit of space on both cds? Look at your log and see what the avg quant was. If you are encoding at quant 2, that's the best you are going to get. See the sticky above!

Either drop to 1 cd or fill up the second cd with something else such as better audio, 2nd audio track, etc. Take out all mpeg4 options (such as b-frames, psychovisuals, etc). OR

Best of all - DON'T WORRY ABOUT IT!

Mac

[jonny]

I'm with Beave on this.
Do a compressibility test!!! 1% of compressibility test take 2-4 minutes of your time, and with the result you can:

1 - select the correct resolution
2 - select the correct number of cds
3 - select the audio quality

[MogWai]

i too shoot for 2cd rips everytime i like the quality to be the max that i can get from divx, and the cost of 2 cdrs is nothing and if i don't get to 1.3 1.4 than i don't really care like other say i just add higher quality audio or just leave it as is.....

[flooo]

just have finished this movie...

here are some infos:

resolution: 704x288
codec: divx v5.0.2 with gmc and b-frames (1027 kbps vbr)

aiming 1 cd with 700mb

a comptest (sharp bicubic resize) of 5% gave me (w/o audio info) a value of about 94%

with an audio file of 160 kbps abr (108 mb) i ended up with a total movie size of 697 mb (credits @ quant 31)

2 cd is def. an overkill for this movie... even if you use 2 ac3 audio streams...

bla,
flooo

[llemor]

Some more examples...

I ripped The Sixth Sense and the final avi size is less than 700MB. Even I increased the bitrate, nothing changed, it ended up with the same avi size.

Harry Potter...about 152 minutes but I can fit it on 1-CD with good quality. Really good quality!!!:)