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Converting from 1080i to 720p on the fly

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  • #16
    Well I'll be a monkey's uncle...

    It seems the two files you uploaded are different, which means that...
    1. The resolutions really are different (and the codec isn't just reporting something weird)
    2. Some kind of scaling happened!
    I'm impressed. If nothing else happened beyond capture (ie, you didn't edit the file, as that would make it conform to project settings and recompress it), then it means during capture from FireWire, three things happened, all in real-time, for the 720p capture from 1080i source:
    1. Decompress source
    2. Scale source to 720p
    3. Compress to Canopus HQ
    What does your CPU utilization look like during capture from 1080i->720p? It should be around the same as 1080i->1080i (1080i has more data to compress, while 720p has less data, but is scaling).

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    • #17
      I can assure you I did NOTHING more than just a capture off the HDV tape using Sony GV HD 700E tape deck. Connected using Firewire to NX card. You can always test it out at your end - the technique I described is pretty clear (as posted in the first posting, right at the beginning of this thread).

      I am running the fastest of Intel quad core Xeon available for my motherboard (with 12MB cache on it).

      When I ran the capture either way (1080i to 1080i OR 1080i to 720p) - the CPU remains about the same (14%) ... visually speaking - a pretty crude way to check.
      TingSern
      --------------------------------------
      Edius 9.4 Pro, Lenovo P72 workstation laptop, 64GB RAM, Xeon CPU, Windows 10 Pro (64 bits), 2 x 2TB Samsung M2.NVME and 1 x 4TB Samsung SSD internal. Panasonic UX180 camera, Blackmagic 4K Pocket Cinema, Blackmagic Pocket Cinema

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      • #18
        Very cool... I will have to verify with the folks in Japan whether this behavior is intended, or just "bonus." :)

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        • #19
          I hoped they keep it this way for subsequent releases of EDIUS :-).
          TingSern
          --------------------------------------
          Edius 9.4 Pro, Lenovo P72 workstation laptop, 64GB RAM, Xeon CPU, Windows 10 Pro (64 bits), 2 x 2TB Samsung M2.NVME and 1 x 4TB Samsung SSD internal. Panasonic UX180 camera, Blackmagic 4K Pocket Cinema, Blackmagic Pocket Cinema

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