Latest post Sun, Feb 6 2011 7:46 PM by katie.gair. 10 replies.
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  • Wed, Feb 2 2011 1:06 PM

    • Hugh Moore
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    • South Australia
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    Understanding HD Resolutions

    Finally upgraded my DV, Have a new Sony Nex Camera which shoots 1080i 50 Video in AVCHD Video. I have it in underwater housing and am very happy so far. Data Rate is 16690 kbps.

    Cant Link to AMA, assume AMA doesnt work with these type of files, however im not fussed.

    Im confused as to what is the best/ideal resolution to import into MC5 for outputting to Bluray and AVCHD movies (Short movies burnt to DVD disks)  and without losing any quality.

    Have used DNxHD 120 for test project and it looks good, obviously when import have several options, DNxHD 185 etc.

    I have captured both and quality looks the same.

    Any reason not to use DNxHD 185 or something else for that matter.

    Thanks

    Hugh

    South Australia

     

     

     

     

     

     

     

    MC 8.3.1 MB: Gigabyte EX58-UD5 Video: Nvidia GeForce GTX750 RAM: 12 GB Windows 10 Boot Drive: SSD Monitors: Dual User: Hobbyist [view my complete system specs]
  • Wed, Feb 2 2011 1:38 PM In reply to

    • Tom Pearson
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    Re: Understanding HD Resolutions

    weakest link theory your avchd files are more compressed than either one of the avid settings so use the smaller one and it will be great 

    Mac Pro 3.5 gig 6 core 64 gig ram D700 radons with ssd os drive with a 20 tb raid, Artist Mix and Artist color Artist control [view my complete system specs]

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  • Wed, Feb 2 2011 4:40 PM In reply to

    Re: Understanding HD Resolutions

    Sorry to hijack the thread, but I believe this could related to the original subject:

    Is there a difference in quality between DNxHD 120 (raster size set to 1920x1080) and DNxHD-TR 120 (raster size set to 1440x1080). Visually I can't see any on the monitor.

    Avid Media Composer 2020.4 HP ZBook 17 Gen3, i7-6700HQ CPU @ 2.60Ghz Win 10, 64GB RAM [view my complete system specs]
  • Wed, Feb 2 2011 6:06 PM In reply to

    • anthas
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    • Hemer, Germany
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    Re: Understanding HD Resolutions

    ... it always depends, whether you like to add VFX, titles, fotos  etc. In this case I would always prefer full hd 1920x1080 50i, DNxHD185x 10bit color space due to extra graphic works, although you would use more hd space.

    Just give it a try.

    MC8.5.3 + Symphony Option, Artist DNxIO, Protools 12.5, Eucon 3.2, Artist Transport + Color + Mix, HP Z840 32GB, Windows 10x64, Internal-SSD, System Raid... [view my complete system specs]
  • Wed, Feb 2 2011 6:18 PM In reply to

    Re: Understanding HD Resolutions

    Is my understanding correct that the higher the DNxHD number (120, 185) the higher the bitrate (?) and therefore the higher the quality? What does the number values of DNxHD refer to? I've trying to get my head around Avid HD for a long time now

    Avid Media Composer 2020.4 HP ZBook 17 Gen3, i7-6700HQ CPU @ 2.60Ghz Win 10, 64GB RAM [view my complete system specs]
  • Wed, Feb 2 2011 7:31 PM In reply to

    Re: Understanding HD Resolutions

    DNxHD-TR 120 means it is using 120 Mb/s (megabit) for  a thin raster frame.

    DNxHD 120 is 120 Mb/s for full raster of 1920 x 1080. Same data rate but larger frame size.

    Meaning TR is more efficient since the data allocation is for HDV's thin raster of 1440x1080.

    MC 2020.6, W10, Gigabyte X299M, Intel 9940X, Gigabyte 2080Ti Waterforce, 64GB RAM, Samsung 970 EVO M.2 SSD, BM Mini monitor & Dell UP2718Q. MBP 2012... [view my complete system specs]
  • Wed, Feb 2 2011 7:47 PM In reply to

    Re: Understanding HD Resolutions

    Thanks Dom.

    I take it then there is no real visible quality difference between TR-120 and 120, other than the frame sizes which only Avid sees? Reason I'm asking is because I'm on a laptop-based system that performance wise handles HD sequences better at a thin raster settings than full raster. I wouldn't want to sacrifice quality

    Avid Media Composer 2020.4 HP ZBook 17 Gen3, i7-6700HQ CPU @ 2.60Ghz Win 10, 64GB RAM [view my complete system specs]
  • Wed, Feb 2 2011 8:05 PM In reply to

    Re: Understanding HD Resolutions

    There is a difference. How visible? Probably barely. DNX TR allows you to allocate the same amount of data in a slightly smaller frame.

    If your sequence are all the same raster size (1440) it should perform slightly better as there are less pixels to process.

     

    MC 2020.6, W10, Gigabyte X299M, Intel 9940X, Gigabyte 2080Ti Waterforce, 64GB RAM, Samsung 970 EVO M.2 SSD, BM Mini monitor & Dell UP2718Q. MBP 2012... [view my complete system specs]
  • Sun, Feb 6 2011 7:13 PM In reply to

    Re: Understanding HD Resolutions

    This thread has been very useful but I was wondering if anyone could answer what is the best resolution that uses the least space to import GOPRO, AVCHD, and CANON 5D please?  Dnx 120 and Dnx 185 x just uses up too much space!

     

    Many Thanks,

    Katie

  • Sun, Feb 6 2011 7:36 PM In reply to

    Re: Understanding HD Resolutions

    Hi Katie,

    The Avid storage calculator can help you figure out how much space a particular amount of a particular resolution will take up, and that can help you decide how to proceed:

    http://www.avid.com/US/resources/avid-storage-calculator

    ciao,
    Carl 

    Media Composer 2020.6 w/Symphony/SS/PF options, HP Z-Book G6 17", i7-9850H 2.60GHz, 32gb RAM, NVIDIA Quadro RTX 3000, Windows 10 Pro [view my complete system specs]

    "There is hardly anything in the world that some man cannot make a little worse and sell a little cheaper, and the people who only consider the price are this man's lawful prey."  - John Ruskin (1819-1900)

     

    Carl Amoscato | Freelance Film & Video Editor | London, UK

  • Sun, Feb 6 2011 7:46 PM In reply to

    Re: Understanding HD Resolutions

    That's great, this is very useful.  Would it affect the quality hugely if I imported my GOPRO, AVCHD, and CANON 5D all at the XDCAM 50 resolution because that uses a lot less space?

    Thanks,

    kt

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