4-pass VBR or One-pass VBR w/ Analysis + unused space?

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  • puraido
    Junior Member
    Junior Member
    • Oct 2004
    • 8

    4-pass VBR or One-pass VBR w/ Analysis + unused space?

    I know that with one-pass vbr the file sizes are not guaranteed, but is it still okay to use it when a given movie comes out to 3.91GB with one-pass and 4.31 on 4-pass? I watched both of them and they look pretty much the same (not to say that my eyes are any good! ) I didn't see anything that i would complain about. I was using Rebuilder 0.93.2 pro beta and CCE SP 2.67.0.27. Any info would be great. thanks. puraido.

    oh yeah, but One-Pass saves a LOT of time. (3 hrs vs 5.5, on P4 2.66 + 1024 MB DDR 2100)
    Last edited by puraido; 27 Jul 2005, 07:11 AM.
  • UncasMS
    Super Moderator
    • Nov 2001
    • 9047

    #2
    i personally do not use opv but that may be a different matter

    if you dont spot any differences then 4 passes might be a waste of time in your case

    i use rebuilder + procoder2 in almost any case and that way i will have a 2pass which provides me with the best quality

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    • puraido
      Junior Member
      Junior Member
      • Oct 2004
      • 8

      #3
      hey, UncasMS!
      Thanks for your help last time I was wondering, with procoder 2, how long does it take for you to encode the average dvd-9 rip and what CPU and memory do you use? my friend has procoder2, but when i was trying it, it took FOREVER, like 10 hours!! I think he has the same CPU as me or a 2.8. Thanks again. puraido.

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      • tigerman8u
        Lord of Digital Video
        Lord of Digital Video
        • Aug 2003
        • 2122

        #4
        two pass allows for more efficient bitrate distribution ie more for high action/complex scenes. I myself use 1 pass alot of the time for low action movies. controversial talk is if you use a constant bitrate of say 8000k you will be using plenty of bitrate for all scenes plus the encoding time will be much less than using a 2 pass vbr with a max of 8000k video bitrate. If the movie is of a length that will allow it to fit on one dvd with this method. You state you use 4 pass. IMO even in high action/complex movies anything over 3 passes is a waste of time. I rarely go over 2 pass vbr.

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        • UncasMS
          Super Moderator
          • Nov 2001
          • 9047

          #5
          I was wondering, with procoder 2, how long does it take for you to encode the average dvd-9 rip
          from memory the last backups i did took between 150 - 300 minutes (pure encoding time) depending on the amount of extra material - i will check the times when i'll be back home

          my encoding machine is an athlon64 3000+ @3500 (venice core) with 1gb infinion (no speed demon)

          ++++

          the encoding times varied from 157 (a 110 min movie without extras) to 301 min (90 min movie + 75 min extra material)
          Last edited by UncasMS; 27 Jul 2005, 11:52 PM.

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          • puraido
            Junior Member
            Junior Member
            • Oct 2004
            • 8

            #6
            thanks guys.. i'm gonna try cce one pass vbr w/ analysis vs 2 pass vbr (or should i go 3?) on an 8 gig dvd (forgot the length of it) and see what happens i'll check it out on my friends procoder too, if i have any patience left thanks again. puraido.
            Last edited by puraido; 28 Jul 2005, 01:10 PM.

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            • tigerman8u
              Lord of Digital Video
              Lord of Digital Video
              • Aug 2003
              • 2122

              #7
              take a small sample video of app 2 minutes with different scenes and try different settings. this is what I do. saves alot of time. and see what you like. then use the settings on your project

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              • UncasMS
                Super Moderator
                • Nov 2001
                • 9047

                #8
                some words on encoding speed:

                same title different methods:



                procoder2 (mastering quality/slowest) - encoding 237 min

                hc 016 testrelease2 best/slowest - encoding 216 min
                hc 016 testrelease2 best/slowest OPV - encoding 111 min

                cce 270 3 passes - encoding 183 min
                added: cce 270 2 passes Matrix AngelVeryLow - 123 min
                cce 270 OPV (default idct) - encoding 67 min

                all IDCTs compared in terms of speed:
                Last edited by UncasMS; 6 Oct 2005, 07:58 AM.

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                • jdobbs
                  Digital Video Enthusiast
                  Digital Video Enthusiast
                  • Sep 2004
                  • 324

                  #9
                  So you are only seeing about a half hour difference between HC and CCE... that's interesting. The difference is much greater on my Athlon XP.

                  [Edit] Whoops I missed the extra pass. That explains it.

                  Comment

                  • UncasMS
                    Super Moderator
                    • Nov 2001
                    • 9047

                    #10
                    indeed, i used 3 passes for cce and hc is 2

                    should have posted this line:
                    cce 270 2 passes Matrix AngelVeryLow - 123 min

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