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gamut/level shift exporting to IMX (PAL) in .MXF OP1a

Mar 1, 2013 4:22 AM

Tags: #export #mxf #pal #imx

Hi Forum.

 

Actually this thread describes the same problem that I have:

 

I export from PPro CS6 timeline to MXF OP1a, with the IMX 30 PAL or IMX 50 PAL setting.

Levels and gamut comes out shifted so that it is clearly visible and gamut goes sporadically out of legal range.

If I export to Quicktime ProRes from the same sequence, everything is fine.

 

I am running PPro 6.0.2. on Mountain Lion 10.8.2.

 

Maybe someone from Adobe´s side can help!?

 

Cheers,

MH

817 Views   11 Replies   Latest reply: Jim Simon, Mar 25, 2013 7:54 AM
 
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  • meisterheisster
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    1. meisterheisster,
    Mar 8, 2013 5:07 AM   in reply to meisterheisster
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    just wanted to add:

    This happens regardless of the footage I edit. I tried with:

    - .avi uncompressed, PAL

    - .m2p, PAL

     

    Sequences have been created with "create seq. from clip".

     

    Actually if I export IMX in QT container, there also is a shift.

     

    Still nobody an idea about this?

     
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  • Jim Simon
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    2. Jim Simon,
    Mar 19, 2013 3:15 PM   in reply to meisterheisster
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    I created color bars, exported out as IMX 50, then reimported into PP.  Looking at both the original bars and those exported, there is a very, very slight shift in levels such that the export is now at about 101 IRE, instead of the original 100.  There were also noticeabe differences between the two on the vectorscope.

     

    My guess is this may be an unavoidable artifact of MPEG encoding, as exporting to lossless did not show the same shifts.

     
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  • Juris Lielpeteris
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    3. Juris Lielpeteris,
    Mar 19, 2013 1:12 PM   in reply to Jim Simon
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    I think that Adobe has confused the color primaries in the MPEG encoder and used ITU-R Rec. 709 to encode SD video. Adobe must fix that problem.

     
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  • Jim Simon
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    4. Jim Simon,
    Mar 19, 2013 3:16 PM   in reply to Juris Lielpeteris
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    https://www.adobe.com/cfusion/mmform/index.cfm?name=wishform

     
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  • Juris Lielpeteris
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    5. Juris Lielpeteris,
    Mar 19, 2013 10:20 PM   in reply to Jim Simon
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    The link is broken:

    We're sorry, we encountered an error processing your request.

     
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  • bobas007
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    6. bobas007,
    Mar 20, 2013 8:22 AM   in reply to Jim Simon
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    https://www.adobe.com/cfusion/mmform/index.cfm?name=wishform

     

    Hehe... I've reported this problem in feb 2011.

    Gues what? No answer. Like I see this bug is still in CS6.

     

    PS: I use ffmbc to produce IMX SD PAL MXF.

     
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  • Jim Simon
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    7. Jim Simon,
    Mar 20, 2013 9:51 AM   in reply to Juris Lielpeteris
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    Must have been offline when you tried.  Works now.

     
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  • Juris Lielpeteris
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    8. Juris Lielpeteris,
    Mar 22, 2013 9:20 AM   in reply to Jim Simon
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    Thank You, Simon.

    I sent bug report today. We have a large number of SC6 Production Premium, and we have moving all production workflow of Latvian TV to CS6.

    Similar bug have Sony Vegas Pro v12 when exporting to HD mpeg-2 for BluRay, and SCS acknowledged that the problem exists:

    http://www.dvinfo.net/forum/what-happens-vegas/513986-vegas-pro-12-all -builds-mpeg-encoding-bug.html

    Juris

    .

     
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  • manofh
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    9. manofh,
    Mar 25, 2013 1:39 AM   in reply to meisterheisster
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    We also reproduced same problem on different hardware platforms. Bad thing that we have many customers that looking on Adobe Premiere CS6 as primary NLE system in facility and one of major disicion points is that they want to choose it cause of ability to export in MXF OP1a IMX and they want to have IMX as theirs main production format. And know looks that we have to stop everything cause of disability of Adobe to fix their problems for 3 years as i understand bobas. Somekind of cheating. I don't belive that support (especially R&D) is checking this forum cause there is no any "Bug confirmed" messages. And this is shame, spending huge amount of money for Adobe products and no support, cause last time i was contacting it, regarding IMX problem, answer was check this page for "phone contacts"  just amazing.

     
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  • Juris Lielpeteris
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    10. Juris Lielpeteris,
    Mar 25, 2013 3:55 AM   in reply to manofh
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    I got a response from Adobe, hopefully they will at some time to do something...

     
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  • Jim Simon
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    11. Jim Simon,
    Mar 25, 2013 7:54 AM   in reply to manofh
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    I don't belive that support (especially R&D) is checking this forum

     

    You're right, they don't.  You have to use the Bug Reporting form I linked to previously for them to see it.

     
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