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Q: DNxHD 36 Data Rate Too High

I am currently trying to use Compressor 4.2.1 to export some DNxHD files. I have the latest and greatest Avid Codecs 2.6 The issue is when I export using DNxHD 36 setting, compressor is not keeping the data rate to 36mbps, it is allowing it to go up to 175mbps. Instead of expected file sizes to be around 3-4GB, I am getting 25-30GB video files. When I try and use MPEGStreamclip to accomplish the same task, it is giving me video files that are capped @ 36mbps. With the 6 minute 42 second test file I am using, the MPEGStreamclip output is a 1.82GB files, while Compressor's version is 8.85GB

 

This sounds like a bug to me, is anyone else having similar issues?

Posted on Sep 9, 2015 4:03 PM

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Q: DNxHD 36 Data Rate Too High

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  • by filmprofmark,

    filmprofmark filmprofmark Oct 6, 2015 5:24 PM in response to xBook
    Level 1 (0 points)
    Oct 6, 2015 5:24 PM in response to xBook

    Exact same issue.  DNxHD 36 export worked fine with previous version of Compressor I was using (don't know the version), just updated to 4.2.1 and now having this issue repeatedly with multiple files.

  • by leopodip4,

    leopodip4 leopodip4 Oct 8, 2015 3:40 PM in response to filmprofmark
    Level 1 (0 points)
    Oct 8, 2015 3:40 PM in response to filmprofmark

    Adding my voice to this issue. I might as well specify that it's been a couple of version since the problem occured. First it would output a dnx 175 instead of 36, unless you explicitly modify the setting once it is instantiated in the "tasks" window, only then it would come out as 36MB data rate. But unfortunately, this workaround doesn't seem to work at all in the latest version (4.2.1) and now I am stuck with an unfixable problem that I thought was fixed as per a "pro-codec fix release...". If I was paranoid, I would suspect Apple to sabotage DNXHD in favour of Apple ProRes.

  • by georgesiddiqui,

    georgesiddiqui georgesiddiqui Dec 1, 2015 9:12 AM in response to leopodip4
    Level 1 (0 points)
    Dec 1, 2015 9:12 AM in response to leopodip4

    This is also happening for us? Getting 175 outputted instread of 36!!!!! using version 4.2.1 on yosemite - happening on two machines.


    Please can we have a fix for this.






  • by Tom Wolsky,

    Tom Wolsky Tom Wolsky Dec 1, 2015 9:25 AM in response to georgesiddiqui
    Level 10 (118,222 points)
    Apple TV
    Dec 1, 2015 9:25 AM in response to georgesiddiqui

    UUse feedback in Compressor.

  • by georgesiddiqui,

    georgesiddiqui georgesiddiqui Dec 1, 2015 10:11 AM in response to Tom Wolsky
    Level 1 (0 points)
    Dec 1, 2015 10:11 AM in response to Tom Wolsky

    Thanks Tom - have done that.

  • by Tom Wolsky,

    Tom Wolsky Tom Wolsky Dec 1, 2015 2:49 PM in response to georgesiddiqui
    Level 10 (118,222 points)
    Apple TV
    Dec 1, 2015 2:49 PM in response to georgesiddiqui

    What a complete piece of **** the Avid website is. No wonder nobody can get anything done with it. The site and trying to download their codec is complete and utter garbage, It's not surprising the company is in the pits. They should be embarrassed by how stupid their organization is.