2-pass encoding?

[JTDROB31]

To:The great folks of the Doom9 forum.

Hi all,I have a simple question to ask and I did not see anything in the guides.Ok,I ran a home movie through a 2-pass encode using TMPGEnce plus.Which looks very good,''I must say.''Now my question is,can I run it back through another 2-pass encode?If it is possible will I see even better results?Or do you think I might start getting bitrate problems?''2-pass encode X 2''If you could help me out a little it would be greatly appreciated....thanks.


Have a super great day.

[r6d2]

Please see this thread:

http://forum.doom9.org/showthread.php?s=&threadid=55100&highlight=tmpgenc

Also don't forget to use the search function, it will save you and other lots of time.

Regards,

[Hiro2k]

It seem like he was asking to do a 2pass encode on his already encoded movie in TMPEG. That will ruin your quality, just like if you encode an MP3 at 128kbs and then reenconde it again at 128. Try it yourself and you'll see what I mean, it's the same with video. After doing the first encode your movie has been compressed as much as possible.

[r6d2]

Originally posted by Hiro2k
[B]It seem like he was asking to do a 2pass encode on his already encoded movie in TMPEG.
Interesting :eek:
I would have never thought it was that what he meant, but you're right.
It'd be like winziping a .zip.

[Lord_KiRon]

Actually the idea of 2path encoding is simple, when you make the first pass (be sure to select 1-st pass of multipass) the .LOG file created. when you do the second pass , the codec uses this LOG file to do better encoding , thats all.

Basically you can disregard the output of the first pass (resulting AVI) - it's not used and oly created for compatibility with some encoding programs.
There for to save time you can encode the first pass even without audio (if you program allows).

[r6d2]

Originally posted by Lord_KiRon
Actually the idea of 2path encoding is simple, when you make the first pass (be sure to select 1-st pass of multipass) the .LOG file created. when you do the second pass , the codec uses this LOG file to do better encoding , thats all.

Basically you can disregard the output of the first pass (resulting AVI) - it's not used and oly created for compatibility with some encoding programs.
There for to save time you can encode the first pass even without audio (if you program allows).
Sorry, you really lost me.
Is it TMPGEnc you're talking about? What .LOG file? What resulting AVI? Which codec?
:confused:

[Hiro2k]

Originally posted by Lord_KiRon
Actually the idea of 2path encoding is simple, when you make the first pass (be sure to select 1-st pass of multipass) the .LOG file created. when you do the second pass , the codec uses this LOG file to do better encoding , thats all.

Basically you can disregard the output of the first pass (resulting AVI) - it's not used and oly created for compatibility with some encoding programs.
There for to save time you can encode the first pass even without audio (if you program allows).

That's how DivX works my friend. And he wasn't talking about that either. Read my post, I'm sure I nailed the question on the head ;)

[killingspree]

Originally posted by Hiro2k
Read my post, I'm sure I nailed the question on the head ;)
In my eyes you did :)

steVe

[r6d2]

So, sorta out of topic answer then? Gee, I was getting really lost :)

[JTDROB31]

To:The fine folks of the Doom9 forum.


Hiro2k,you are right!!That's what I was trying to do.A 2-pass encode on a already encoded file.The reason was,I'am still getting some pixelation and thinking maybe another pass would clear it up.Ok guys thanks again for all your help and time.


Have a great day.

[r6d2]

Originally posted by JTDROB31
I'am still getting some pixelation and thinking maybe another pass would clear it up.Ok guys thanks again for all your help and time.

Try increasing the BR or applying soften block noise. Use of an avisynth filter like Deen() may also solve your problem. (You'll have to re-encode from scratch anyway.)