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  • Handbrake 1 pass 2 pass

    I exported a 10 second clip from Edius and converted it to mp4 with Handbrake twice... once with 1 pass and again with 2 passes. Then I brought them back into Edius and turned on and off the eye of the top one to compare... and I didn't see a difference in one single pixel. What gives?
    Gigabyte Z77X-UP4 TH, Intel Core i7 3770k 3.5GHz, 4 Core, 8 Threads, 32GB RAM, NVIDIA GeForce GTX 660 2GB, 500GB SSD HDD for OS, 40TB Usable Hard Drive Capacity, Window 10 PRO 64-bit Edius 9.5 WORKSTATION...

  • #2
    You would see more if you use the difference key filter!

    Andreas
    Andreas Gumm
    post production / authoring
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    GV hardware: 3G Storm
    software SONY DoStudio Indie + EX 4.0.11
    PC 2
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    Geforce 650 GTX, 5x HDD, Windows 7,
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    • #3
      Originally posted by Andreas_Gumm View Post
      You would see more if you use the difference key filter!

      Andreas
      Decomb is set to default and rest are off. I don't see a difference filter.
      Gigabyte Z77X-UP4 TH, Intel Core i7 3770k 3.5GHz, 4 Core, 8 Threads, 32GB RAM, NVIDIA GeForce GTX 660 2GB, 500GB SSD HDD for OS, 40TB Usable Hard Drive Capacity, Window 10 PRO 64-bit Edius 9.5 WORKSTATION...

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      • #4
        I meant the difference key filter in EDIUS to compare both clips!

        Andreas
        Andreas Gumm
        post production / authoring
        PC 1Intel Core i7-970 (6 x 3.20 GHz),
        ASUS P6T Deluxe V2, 12 GB RAM, Geforce 9800GT
        Windows 7 Ultimate,
        GV software: EDIUS 7.42, VisTitle v2.5,
        GV hardware: 3G Storm
        software SONY DoStudio Indie + EX 4.0.11
        PC 2
        Intel Core i7-3770, GIGABYTE Z77X-UD5H F14, 16GB RAM,
        Geforce 650 GTX, 5x HDD, Windows 7,
        GV software: EDIUS 7.42, ProCoder 3.0
        GV hardware: HD SPARK
        software: Telestream Switch, DTS-HD MAS, Dolby Media Meter

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        • #5
          Originally posted by Andreas_Gumm View Post
          I meant the difference key filter in EDIUS to compare both clips!

          Andreas
          Nice idea. In programming, we use XOR, which is like the difference key in editing... I'll try it.
          Gigabyte Z77X-UP4 TH, Intel Core i7 3770k 3.5GHz, 4 Core, 8 Threads, 32GB RAM, NVIDIA GeForce GTX 660 2GB, 500GB SSD HDD for OS, 40TB Usable Hard Drive Capacity, Window 10 PRO 64-bit Edius 9.5 WORKSTATION...

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          • #6
            XOR always wins!

            If you need to see super-subtle detail, you can apply a Chrominance filter with luma limits and boost/color anything greater than a given range.

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            • #7
              It would also depend on the bit rate. If the bit rate is high enough I would not expect to see a difference between a two pass and one pass encode. You need two pass to get the best out of encodes where you are trying to squeeze it a lot.

              I don't know what the "sweet spot" would be for H264 but for DVD in programs like Adobe Encore they choose constant bit rate for anything under an hour and 2 pass VBR for anything over an hour, on the basis that under an hour, at the bit rate needed to fit that on a DVD, you can't see the difference between constant and VBR.
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