Latest post Wed, Jan 8 2020 1:52 PM by gyula@colorfront.com. 4 replies.
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  • Wed, Jan 8 2020 2:49 AM

    DNxHD100 and AMT3

    Dear AMT Developers,

     

    I would like to create a DNxHD80 full raster file with AMT 3.14.

    But the resolution of the result MXF file is 1440x1080. But it should have a 1920x1080 resolution.

    I attached the MAD xml. 

    I can create this file without any issue with the old AMT2.0.

     

    Coudl you help where should be the problem?

     

    Thanks,

    Gyula Priskin 

    Colorfront

     

  • Wed, Jan 8 2020 7:33 AM In reply to

    Re: DNxHD100 and AMT3

    Not that I know the answer but 1440 is Thin Raster (TR) and a valid resolution. I would imagine there must be away to specify Thin Raster or full Raster.

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  • Wed, Jan 8 2020 9:31 AM In reply to

    Re: DNxHD100 and AMT3

    I did not find it in the documentation how to define the "full raster".

    I tried to extract the MAD xml from a full raster DNx80 mxf file with AMT 3, but the resolution was 1440 in it.

     

    Thanks,

    Gyula

  • Wed, Jan 8 2020 12:35 PM In reply to

    Re: DNxHD100 and AMT3

    This document

    https://www.avid.com/static/resources/US/documents/dnxhd.pdf (page 9 and the notes on page 10)

    Shows DNxHD 80mbps as 1920x1080 *   and the note states its subsampled t0 1440

     

    So I'm guessing your full raster DNxHD 80 is actually subsampled to 1440

    ACI Moderator. I'm not employed by Avid or work for them. I just do this in my spare time. Normally using the current Media Composer version on My... [view my complete system specs]

     

    Broadcast & Post Production Consultant / Trainer  Avid Certified Instructor VET

     

    QC/QAR Training - Understanding Digital Media - Advanced Files * Compression - Avid Ingest - PSE fixing courses and more

    All bespoke and delivered onsite at yours. Or delivered via hostred Zoom session.

     

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  • Wed, Jan 8 2020 1:52 PM In reply to

    Re: DNxHD100 and AMT3

    Thanks, it is true, the DNxHD essenece is the same for full and thin raster, as I understand.

    But in the case of full raster, the StoredWidth, DisplayWidth in the mxf are 1920 instead of 1440.

     

    So the problem, seems to be, that the AMT3 sets teh StoredWidth,Displaywidth to 1440. While the AMT2 set it to 1440.

     

    Gyula

     

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