2 pass encoding

[jerets]

how does 2 pass work? how do i do it?
i know that:
1 pass has uncontrolled bit rates, it is simpler, takes shorter time to encode, and doesn’t have as good as quality... but i dont know how to do pass. the "2-pass, first pass" isn't viewable and is super small in file size and i dont know what its for and the "2-pass, second pass" turns out viewable but im not sure if i was supposed to do anything else or not.
thanks for any help.. im really confused.
thanks
jerets

[sterno]

With tmpgenc the first pass (0%-50%) of a 2-pass VBR encode is just to analyze the video to decide how to best use the available bitrate. It doesn't produce any usable result by itself. The second pass (50%-100%) gives you your MPEG.

All you do is set up your encode, click "start", and wait for it to finish. When it finishes, you take the file and do whatever you want with it.

[jerets]

how about in vdub (w/ divx)? the "2-pass, first pass" is too small of a file and unviewable and the "2-pass, second pass" turns out okay but im not sure if i was supposed to do something more or not? like you said they go together.. but how do i make them go together in vdub? hows anyone done this in divx before?
thanks
jerets

[vhelp]

Quicky Guide for divX 2pass using VDUB
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1 - open AVI in vdub
2 - set your audio if you like
3 - go to compress and select divx, set to 1st pass, plus your settings
4 - file/SaveAs.., at bottom of dialog box, click the [x] Add operation to job...
5 - click [OK]
6 - now, go back to compress and select divx again, but now use 2nd pass...
7 - again, file/SaveAs.., at bottom of dialog box, click the [x] Add operation to job...
8 - click [OK]
9 - now, "file/job control", be sure that only the two files you want are showing
* ... if they are, click [START] button, and wait for BOTH to encodes to complete.
* ... once all is finished, watch and enjoy.

Note on file/SaveAs.. naming your "project" files.
-----------------------------------------------------------------
best to name file something easy to remember, like cobra.A and cobra.B
A will be your 1st pass and B will be your 2nd pass.

That's about it. Have fun.
-vhelp
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Happy HOLIDAY all.

[jerets]

sweet. thanks for the help
it seemed to work fine. i followed the instructions and it came out as two files part 1 and part 2. the first part from the "2-pass, first pass" and the second part from the "2-pass, second pass"... but only the second pass was playable. is that how its supposed to be? just checking to be sure i did everything correct.
thanks so much
jerets

[vhelp]

>> is that how its supposed to be?
yep!! ..there's no 3rd file - sort of missleading in a way.

-vhelp
----------------------------------------------
Happy HOLIDAY all.

[banjazzer]

The first pass of a multipass encoding system produces a small information file for subsequent passes to use.

By the way - I don't really see the connection to Editing, cutting and joining.

[crahak]

First pass is used to analyze, not to create a file that can be played.
I basically always name the first pass avi file "pass1.avi", makes things easy, just me I guess, and then the other one with the real name I want.

Just a lil thing to speed up your encodes a lil bit further at no cost
On pass1, I select "no audio", then on pass2, "avi audio", "full processing" (compression and all...) That way, you're going to encode the audio in the sencond pass only, I just see no point on spending the cpu power to convert and compress audio in the first pass, since you're never going to listen to it... Hope that helps too.

[jerets]

thanks guys! i got it to all work out. i really appreciate it thanks so much

crahak: of all the different places to put this i felt it fit best under editing since i had to do w/ encoding.. dunno. just thought id drop it here

thanks again guys
you were a big help
merry xmas to ya all =)
jerets