Latest post Fri, Aug 17 2018 5:03 PM by jef. 3 replies.
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  • Thu, Aug 16 2018 8:24 PM

    • I'mWorried
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    • Joined on Fri, Oct 14 2011
    • Memphis, TN
    • Posts 16
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    Editing and export NTSC 4:3 QuickTime ProRes 422 (HQ)

    What is the best way to edit and export NTSC 4:3 that was transferred to QuickTime ProRes 422 (HQ)?  I have long researched the settings but I'm still confused.  I am using MC 6.0 on an older machine.  The footage was recorded on reel-to-reel videotape in 1977.

    Each media item is present in each of two formats in this MC project: one set of the media is AMA (which after 5 years of delay re-links to AMA files) another set of the same media is MXF (this re-linked by dragging msmMMOB.mdb to a bin).

    AMA is in a bin as Audio bit depth 24; Format SD 30i NTSC; Video Quicktime ProRes 422 (HQ); Color Space YCbCr 601; Pixel Aspect Ratio 0.900; Drive F: (correct location but Source/Path listed as H: (this is incorrect, media/file does not exist on that drive). Choosing "Get info for this file" in the bin indicates FPS as 29.97 (not 30i).

    MXF is in bin as Audio bit depth, 24; Color Space YCbCr 601; Pixel Aspect Ratio 0.900; Format SD 30i NTSC; Video DV 25 411 (NTSC); Source F:\Apple ProRes Files\...(this is incorrect, actual address is F:\AvidMedia Files\MXF\1).  Choosing "Get info for this file" in the bin indicates FPS as 29.97 (not 30i).

    The MXF are smaller files and would use fewer resources for offline edit.  But how get back to the higher resolution for the online edit and export?  I found this: "PC MC's before 6.5.2 (I am using MC 6.0) can only link to ProRes media, not consolidate it, only transcode it to something other than ProRes. The technical term is that APR before 6.5.2 was Sample Provider."  But MXF is not recommended for long format shows in MC 6.0 right?

    There are so many choices to Send to QT movie (QT ref exports cannot be performed on sequences containing AMA material): Width x Height (601 non-square, 640 4:3 sq, 720 4:3 square pix, vga, internet video and more!)  Field order, Display\Aspect Ratio.  I know that in order to add HD material I will need to import this SD project into an HD project keeping the 4:3 designated as "pillared" right?

    What is the best way to edit NTSC 4:3 ProRes and export for DVD or Internet posting so that the 4:3 won't get stretched and the file won't be re-transcoded thereby reducing reduced quality?

    Your help is greatly appreciated!

    MC v8.5.3 on HP Z820 Workstation, 2x Xeon E5-2590v2 2.40 GHz 12 core, RAM 32 GB, Win 7 Pro 64, NVIDIA Quadro K4200 (driver v347.520), HP Turbo G1, Samsung... [view my complete system specs]
  • Thu, Aug 16 2018 9:00 PM In reply to

    • jef
    • Top 50 Contributor
    • Joined on Sun, Feb 26 2006
    • Maryland
    • Posts 3,375
    • Points 40,765

    Re: Editing and export NTSC 4:3 QuickTime ProRes 422 (HQ)

    My biggest issue with editing SD in Avid these days is with how it handles the pixel aspect ratio of SD files made by Adobe. And possibly other tools.  You write you are AMA linking some files.  They had to come from somewhere.

    Avid believes the PAR of SD should be .90  Adobe believes it should be .9091.  When Avid see this difference, it "fixes" it by scaling the image, and the image gets soft.

    I have worked out how to force Frame Flex to not do this.  I do not have those notes near me.  And I do not know if your version of Avid uses Frame Flex.

    If I get time I will try to answer your question point by point.  But Avid seems to really want to make editing SD hard.  You can not use any of their DNx codecs.  The new DNx HR codecs support the frame size, but do not work in interlace which is where I would guess you want to be.

    Jef

    Avid DS 11.0.2 R.I.P | MC "Well, it depends ..." mostly 8.10.0 but playing w 2018.11| OS 10.11.x - various MacPro Towers - home system MacPro... [view my complete system specs]

    _____________________________________________

    Jef Huey

    Senior Editor

    Old Stuff  http://vimeo.com/album/3037796

  • Fri, Aug 17 2018 12:41 AM In reply to

    • jwrl
    • Top 25 Contributor
    • Joined on Thu, Oct 13 2005
    • Melbourne, Australia
    • Posts 8,385
    • Points 97,005

    Re: Editing and export NTSC 4:3 QuickTime ProRes 422 (HQ)

    jef:
    Avid believes the PAR of SD should be .90  Adobe believes it should be .9091.
    Could be a confusion between SMPTE RP 187 and ITU-R BT.601, although annex 4 now brings SMPTE RP 187 into line with ITU-R BT.601.  The current specification for NTSC is a PAR of 10:11. which gives 0.90 recurring.  If that's the case Adobe is more accurate than Avid if Avid are currently using a PAR of 0.9.

    MC 7.0.4 - Asus P6T Deluxe V2 mobo - Intel i7 920 2.66GHz - Windows 7 Ult64 SP1 - nVidia Quadro FX 1800 - 16 Gbyte low latency DDR3 RAM - Internal 8 Tb... [view my complete system specs]
  • Fri, Aug 17 2018 5:03 PM In reply to

    • jef
    • Top 50 Contributor
    • Joined on Sun, Feb 26 2006
    • Maryland
    • Posts 3,375
    • Points 40,765

    Re: Editing and export NTSC 4:3 QuickTime ProRes 422 (HQ)

    All possible.  My gripe is that Avid does not seem to want to address any of this.  SD is .9.  End of story.  As a result, image quality is degraded unless you jump through hopes.

    Jef

    Avid DS 11.0.2 R.I.P | MC "Well, it depends ..." mostly 8.10.0 but playing w 2018.11| OS 10.11.x - various MacPro Towers - home system MacPro... [view my complete system specs]

    _____________________________________________

    Jef Huey

    Senior Editor

    Old Stuff  http://vimeo.com/album/3037796

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