Latest post Fri, Jul 25 2014 6:48 AM by luca.mg. 15 replies.
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  • Fri, Jul 13 2012 7:09 AM

    • struijs
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    HDV 1080i export to SD 576i problems

    Hi experts,

     

    I have HDV 1080i tape captured in Avid. (interlaced timeline)

    I try to export that to Quicktime movie 1024x576i.

    But what ever i choose, upper or lower field, the exported file is progressive!!!

     

    But i NEED interlaced.

     

    Any ideas?

     

    Kind regards, Peter

     

     

    MC 2018.7.1, PDW-U2, Mac OSX 10.10.5 [view my complete system specs]
  • Fri, Jul 13 2012 8:34 AM In reply to

    • mjolnarn
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    Re: HDV 1080i export to SD 576i problems

    You don´t mention if it is Pal or NTSC and not either your version of Media Composer, your profile is empty.

    A guess from me is that you are on Pal and have found that small Pal SD 1 : 1 bug that have been for a while.

    If so, in the advanced codec settings, set it to Pal Progressive and you will get Pal Interlaced ...

    Mac: 17" Macbook Pro i7 2,66 ghz with 8Gb Ram, 500gb 7200rpm drive___ PC_NEW Win10 Pro Mbo Asus Rampage IV Black CPU Ivy Bridge-E 4960X ( = 12 x 4... [view my complete system specs]

    Tomas 

     

  • Sat, Jul 14 2012 3:22 PM In reply to

    • struijs
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    Re: HDV 1080i export to SD 576i problems

    I am working with PAL.

    Where can i find some details about this known bug?

    Thanks to put me on a road.

     

    Peter

     

     

    MC 2018.7.1, PDW-U2, Mac OSX 10.10.5 [view my complete system specs]
  • Sat, Jul 14 2012 3:24 PM In reply to

    • struijs
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    Re: HDV 1080i export to SD 576i problems

    NB Media Composer 5.last...:-)

    MC 2018.7.1, PDW-U2, Mac OSX 10.10.5 [view my complete system specs]
  • Sat, Jul 14 2012 3:28 PM In reply to

    • mjolnarn
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    Re: HDV 1080i export to SD 576i problems

    struijs:

    I am working with PAL.

    Where can i find some details about this known bug?

    Hi Peter, I don´t think that this bug is officially documented, please tell if my advice worked, easiest way to check is to ama link and step field to field, you might need to apply a key to that command, I have replaced the default 3 and 4 , step frame to frame , with step field to field , if you want to keep the defaults you might use the shift key for your new commands

     

    Mac: 17" Macbook Pro i7 2,66 ghz with 8Gb Ram, 500gb 7200rpm drive___ PC_NEW Win10 Pro Mbo Asus Rampage IV Black CPU Ivy Bridge-E 4960X ( = 12 x 4... [view my complete system specs]

    Tomas 

     

  • Sat, Jul 14 2012 6:53 PM In reply to

    Re: HDV 1080i export to SD 576i problems

    My advice would be to bypass the QT encoder (which is crappy and lacks control). If you're setting custom export options in Avid, you are in fact using the QT encoder.

    So to bypass it: switch your project to SD 16x9 25i, do a video mixdown in something like DV25 (i), then export Same-As-Source with the 16x9 box checked. This shouls give you precisely what you want.

    Media Composer Symphony | PT Ultimate | Win10 HPZ | OSX MBP | ISIS5000 [view my complete system specs]
  • Sat, Jul 14 2012 7:18 PM In reply to

    • mjolnarn
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    Re: HDV 1080i export to SD 576i problems

    That SAS workflow works great Job re the Pal SD 1 : 1 codec but for those of us going the Avid - AE - Avid route there are no other alternative than my described workflow, from memory I think this got broke with MC 3,5 , Avid bug or Quicktime bug but it is there .

    I´m reminding the Avid techs about this error rather frequently , maybe we will get a fix soon .

    And Dv 25 i would not be my first selection when downscaling HD to SD , a combination of Avids bad downscaling and a lousy codec would make this look like old youtube clips .

     

    Mac: 17" Macbook Pro i7 2,66 ghz with 8Gb Ram, 500gb 7200rpm drive___ PC_NEW Win10 Pro Mbo Asus Rampage IV Black CPU Ivy Bridge-E 4960X ( = 12 x 4... [view my complete system specs]

    Tomas 

     

  • Sat, Jul 14 2012 7:38 PM In reply to

    Re: HDV 1080i export to SD 576i problems

    I'm not that negative about DV25. If you want better scaling, I'd still skip QT and do the scaling in Squeeze or TMPGenc.

    Media Composer Symphony | PT Ultimate | Win10 HPZ | OSX MBP | ISIS5000 [view my complete system specs]
  • Sat, Jul 14 2012 7:49 PM In reply to

    • struijs
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    Re: HDV 1080i export to SD 576i problems

    I want an export to SD mpeg 30. (this is whats also in the timeline sometimes)

     

    So, format to SD pal 25i. And than a videomixdown to mpeg30?

     

    If after that i export to H264, do i have my interlaced back?

    MC 2018.7.1, PDW-U2, Mac OSX 10.10.5 [view my complete system specs]
  • Sat, Jul 14 2012 8:16 PM In reply to

    Re: HDV 1080i export to SD 576i problems

    struijs:
    If after that i export to H264
    If you need H264, do not do it from within Avid, do not do it from within QT Pro, do it from Sorensen Squeeze. No need to go to SD first then, let Squeeze do the scaling.

    Media Composer Symphony | PT Ultimate | Win10 HPZ | OSX MBP | ISIS5000 [view my complete system specs]
  • Sat, Jul 14 2012 8:18 PM In reply to

    Re: HDV 1080i export to SD 576i problems

    Or, if you need an MPEG30, I would try to avoid QT. Flip the project format to SD (yes, that is not the cleanest way to scale), then choose File->Export and export as MXF Op1A, set it to MPEG 30.

    You need v6 to do a straight export to MXF OP1A. In earlier versions, you can use a workaround by exporting to a virtual XDCAM disk.

    Media Composer Symphony | PT Ultimate | Win10 HPZ | OSX MBP | ISIS5000 [view my complete system specs]
  • Thu, Jul 24 2014 4:53 PM In reply to

    • dugmoore
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    Re: HDV 1080i export to SD 576i problems

    I did this, and it does look better than what I was doing with custom exports.

    However all of my exports are 4x3. Any idea as to how I might keep it at 16x9?

    I know this is a PC thread, but I came across it as I was looking around for other options for exports.

    I'm on a Mac, Mavericks, MC 8, no soreson squeeze on the machine.I am suppsed to be exporting as 25i, 16x9. European news for broadcast. I have been importing the files into an 1080i/50 project.

  • Thu, Jul 24 2014 5:19 PM In reply to

    Re: HDV 1080i export to SD 576i problems

    Are you checking the result in Quicktime X or in Quicktime 7? Might make a difference.

    if you have QT7 Pro you can always open the file's properties through Cmd-J, choose visual settings, untick the 'keep aspect ratio' box, set the display size to the appropriate unsqueezed settings (853x480 for DV-NTSC, 1024x576 for PAL).

    However, note that if you are required to deliver in 16:9 Full Height Anamorphic, it may very well be that the file you need to deliver will need to look squeezed in a 4x3 canvas.

    Media Composer Symphony | PT Ultimate | Win10 HPZ | OSX MBP | ISIS5000 [view my complete system specs]
  • Fri, Jul 25 2014 6:20 AM In reply to

    • luca.mg
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    Re: HDV 1080i export to SD 576i problems

    On the Mac You can use MPEG Steamclip to encode; depending on what the final destination of the file is You may want to encode a standard 720x576 file, or a 1024x576 file. I know it's not related but there's another Avid QT export bug: the files are always Million colours+, with alpha channel information, at least when exporting to some Avid codecs, increasing the file size with unneeded info.

    Symphony 20.06, BM Intensity Pro 4k, Windows 10, i7-5930K, 32 GB ram, Quadro K620 [view my complete system specs]

    peace luca

  • Fri, Jul 25 2014 6:35 AM In reply to

    Re: HDV 1080i export to SD 576i problems

    There is no logic to a 1024x576 delivery for broadcast. SD PAL is 720x576. Flagged to be 16:9. Forcing a 1024 width adds interpolated pixels to make it viusally look correct. That's fine and needed for web display but pointless for broadcast. At the broadcast end they will have to re-convert to 720x576.

    So you should expect to produce a 720x576 file flagged to be 16:9 and as Job says not all players respect the 16:9 flag so it may look wrong but be correct.

    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]

     

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