Latest post Mon, Mar 16 2009 8:10 PM by benscripps. 2 replies.
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  • Tue, Mar 10 2009 4:23 PM

    • benscripps
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    • Cadillac, MI
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    Importing H.264--Audio Unsynched

    Hi all!  Hoping someone has seen this sort of problem before and has some tip on fixing it...

    We occasionally receive commercials from a production house as an H.264 Quicktime.  When I try to import the .mov file into our Newscutter Adrenaline (not sure on the exact version; I'm writing this from home, but I wanna say 6.5.something), video comes in just fine, and audio comes in just fine, except that the audio and video don't sync with one another.  As an example, I imported into NCA a commercial--it started with :05 of slate, :05 of black, :15 of the actual spot itself, then a couple of seconds of black pad at the end.  So the video runs for about 30 seconds.  The audio for the spot, however, starts playing immediately at the start of the imported clip--I hear the actual commercial audio ("Acme Widgets is having our annual winter blowout!", not tone or anything like that) under the slate, and under the black, and when the video for the commercial starts, the audio is about :10 in to the actual spot audio.  When it "runs out" of audio, the last second of the audio starts repeating, as if it's an LP stuck on a scratch, and repeats constantly until the video ends.

    If I open the Quicktime .mov file in Quicktime Player by double-clicking in Explorer, it plays perfectly fine--there's no audio under the slate, no audio under the black, and the audio runs perfectly under the spot itself.  And if I import the H.264 .mov into Adobe After Effects, not only does it play fine there, but I can render it as a different H.264 QT movie, then import the After Effects rendered QT into Avid, and it plays perfectly fine in Avid. 

    I'm just assuming this is something odd in the production house's workflow, but I don't know what--anyone ever seen anything like this and have any answers?  Thanks!

    Newscutters (5 NC, 1 NC Adrenaline), MC Adrenaline, Unity MediaNetwork, 4 AirSpeeds (2 ingest, 2 playback), DekoCast HD, Thunder HD, Command [view my complete system specs]

    Ben Scripps WWTV/WWUP-TV benscripps (at) 9and10news (dot) com

  • Sun, Mar 15 2009 8:12 PM In reply to

    • BobRusso
    • Top 75 Contributor
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    Re: Importing H.264--Audio Unsynched

    Make sure the correct version of QT and nVidia drivers are installed. This is a Media Composer version Matrix that you can use for NewsCutter. You will only have to substitute the first number. For example, MC 2.8.3 is the same as NC 6.8.3. I'm sure you can figure out the rest.

    Go to Control Panels > QuickTime and the advanced tab. Make sure Safe mode (GDI only) is selected.

    If this doesn't work, open the QuickTime in MPEG Streamclip and save it as an Avid Codec QuickTime file. This will fast import into the Media Composer.

    -- Bob Russo Applications Specialist at Avid Technology

    Bob Russo on Expert Connections

  • Mon, Mar 16 2009 8:10 PM In reply to

    • benscripps
    • Not Ranked
    • Joined on Tue, Feb 7 2006
    • Cadillac, MI
    • Posts 18
    • Points 260

    Re: Importing H.264--Audio Unsynched

    Thanks for the info--I'm on a NCA 6.2.6, so I reinstalled nVidia 77.18 and rolled back Quicktime (it had been 7.1.5; it's now 7.0.4).  The glitching I described in my initial post *is* different now, but it still doesn't come in right. 

    The MPEG Streamclip path seems like a quick fix, but I was hoping to find something a little less...um...user involved.  (Meaning, **I** have no problem working around the issue, but some of the old timers around here...maybe not so much.) 

    Newscutters (5 NC, 1 NC Adrenaline), MC Adrenaline, Unity MediaNetwork, 4 AirSpeeds (2 ingest, 2 playback), DekoCast HD, Thunder HD, Command [view my complete system specs]

    Ben Scripps WWTV/WWUP-TV benscripps (at) 9and10news (dot) com

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