Latest post Tue, May 20 2008 11:15 PM by Dave G. 4 replies.
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  • Fri, May 16 2008 3:20 PM

    Finally sorted out DV25 in Sorenson Squeeze

    I realize that this is probably not new to any of the regulars on this forum, and it's probably been posted to death many times before, but if you've battled with this for as long as I have this might help - in an 25i PAL project with DV25 media, don't try to send off a QT ref to Sorenson Squeeze for DVD if it is in any way made up out of mixed media (eg. 1:1 titles or graphics over your DV25 video).  If you do, you will get field order problems on the final DVD even though everything looked OK in MC on your client monitor AND even if you made sure to tell Squeeze that the QT is lower field first. Mixdown EVERYTHING as DV25 and then Squeeze.  Hopefully this saves someone just like me a box of DVDs somewhere Smile

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  • Fri, May 16 2008 6:05 PM In reply to

    • Mark Job
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    Re: Finally sorted out DV25 in Sorenson Squeeze

    ....Just one more thing Sorensen should be able to handle out of MC in the first place.

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  • Sat, May 17 2008 1:04 AM In reply to

    • jwrl
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    Re: Finally sorted out DV25 in Sorenson Squeeze

    In the PAL world DV25 is the opposite field dominance to every other video format you're likely to encounter.  If Sorenson sorts out the mess with mixed DV and non-DV there is potential for ambiguity on cuts, causing other problems.  Better by far to sort out the problem in Avid, where you have access to everything you need.

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  • Mon, May 19 2008 7:33 AM In reply to

    Re: Finally sorted out DV25 in Sorenson Squeeze

     Here's how I got to my conclusion: 

    1) Had a squence made up of DV25 media with 1:1 titles and a couple of 1:1 animations brought in from AE.  Sent the QT ref off to Squeeze.

    2) In Squeeze left the field order to Upper and the resluting DVD was a mess.  Was puzzled by this, made a couple more unsuccessful attempts with the same settings.

    3) Went back to Squeeze, this time with field order set to Lower, and now all the DV25 footage was OK but all the portions with 1:1 titles and animations showed swopped fields

    4) Went back to MC, mixed down everything to DV25, exported QT ref from that.  Pulled that into Squeeze, set the field order to Lower, Squeezed.  This time the DVD was OK. Cheered, went out for a beer

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  • Tue, May 20 2008 11:15 PM In reply to

    • Dave G
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    Re: Finally sorted out DV25 in Sorenson Squeeze

    The other reason for this happening can be that if Sorenson sees a 720x486 (D1) picture coming in, rather than just cropping it to DV 720x480 when encoding MPG-2, it vertically compresses the video.  And if it's interlaced video, it will totally mangle it and make your output look all wavy and distorted with any horizontal movement.

    It's pretty easy to fix however, just crop the top 3 and bottom 3 lines and it will encode properly.

    Dave

    Television & Video Production Instructor, Online Editor & Post Tech.

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