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Transcoding Problem

906 Views 11 Replies Latest reply: May 9, 2012 11:21 AM by David Mclaine RSS
bithedz Level 1 Level 1 (5 points)
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May 7, 2012 4:54 PM

Hello All:

 

Hoping someone can help me with this...

 

I just bought a Panasonic HCV700 camcorder and want to import 1080/60p footage.

I've watched Shane Ross' excellent Tapeless Workflow tutorial, and here's my problem:

I've copied and backed up the files, set a Logging Bin, opened up Log and Transfer, imported files, set Preferences

(AVCHD to ProRes 422 LT), and I get all the info in the Browser area except the image thumbnail--so video isn't importing.

 

I'm using Final Cut 7.0.3 with a Dual-Core Intel Mac Pro.

 

I've also tried 1080/60i with no luck. I also tried the trial version of ClipWrap 2, picture was horrible and sound was way off.

 

So, am I doing something wrong, or is the camera incompatible with my editing system?

 

Thanks in advance!

Mac Pro, Mac OS X (10.6.8)
  • Shane Ross Level 8 Level 8 (41,655 points)
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    May 7, 2012 5:25 PM (in response to bithedz)

    The FORMAT you are shooting is incompatible.  1080p60 is something FCP doesn't work with, as it is a new, and really RARE format.  It is only used to shoot footage intended to be slowed down to 30fps.  There is no 1080p60 deliverable...master format.  1080 is a 30 frame master format.  The web doesn't do 1080p60, no tape does 1080p60...thus why FCP doesn't really work with it.  The NEW FCP-X does.  But the old one, FCP 7...released in 2009...does not.

     

    You need to use CLIPWRAP2 to convert the footage. 

     

    And again, only shoot 1080p60 if you intend to slow the 60fps footage down to 30fps or 24fps, as there is no 1080p 60fps deliverable...no way to master to that format.

  • Shane Ross Level 8 Level 8 (41,655 points)
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    May 7, 2012 6:59 PM (in response to bithedz)

    I'm flagging your post so the developer of ClipWrap 2 will chime in. 

     

    The camera should have the option to shoot 1080i30...or 1080p30.  It doesn't ONLY shoot 1080p60.

  • Jim Cookman Level 7 Level 7 (23,435 points)
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    May 8, 2012 6:06 AM (in response to bithedz)

    Freezing picture might be the result of drives too slow or too full to keep up. Clip wrap is pretty spiffy.

  • Colin Mcfadden Calculating status...
    Currently Being Moderated
    May 8, 2012 3:21 PM (in response to bithedz)

    Definitely sounds like your computer is just having trouble keeping up during playback.  Try converting to a format like Apple Intermediate with Clipwrap and see if it plays better- H264 (avchd) is very CPU intensive to decode, and 60p is (obviously) twice as intensive as 30p (or 60i).

     

    -Colin (divergent media)

  • Colin Mcfadden Level 2 Level 2 (160 points)
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    May 8, 2012 7:58 PM (in response to bithedz)

    First off, I would stick to a sequence in FCP that matches your source - so ProRes LT 1080p60 or whatever.  If you don't match them, you're just adding a generation loss unnecessarily.  Let FCP adjust the sequence settings for you, and then don't touch them. 

     

    I don't think that's your real issue though - I suspect you're up against the general crumminess of Compressor's MPEG2 encoder.  You'll find all sorts of voodoo online about how to get better results - one option is to use the optical flow functionality to get better resizing - smushing HD footage down to SD can introduce all sorts of weird moire and other issues if not done "smartly."  Or, if you happen to have another dvd app (like adobe encore) give that a try.

     

    But generally, I would bet that compressor is the weak point in your chain as you describe it.

     

    -Colin

  • Jim Cookman Level 7 Level 7 (23,435 points)
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    May 9, 2012 8:35 AM (in response to Colin Mcfadden)

    And I wonder if there's a field dominance issue here as well...

  • Jim Cookman Level 7 Level 7 (23,435 points)
    Currently Being Moderated
    May 9, 2012 9:20 AM (in response to Jim Cookman)

    Let me also add:

     

    I'm a big fan of keeping the media pristine until it's absolutely necessary to stomp on it:  That way there's only one place to look if the compression is bad, rather than have to chase along a chain of downrezzing and recompressions to search out the culprit.

     

    That said, one can usually get a rather stunning DVD when starting with a 720p sequence export.  Another thing you might experiment with is doing a full rez output then running the footage through compressor's advanced format conversion and making an SD file that you then compress for the dvd.

     

    I don't have any real answers for you, and the only advice I can offer is to work with a short portion of your timeline and make small exports to do your tests with.  Get a pad and pencil and take notes on your process.  It'd be a b*tch to get a great conversion and not remember what you did.  Good luck.

  • David Mclaine Level 4 Level 4 (1,855 points)
    Currently Being Moderated
    May 9, 2012 11:21 AM (in response to bithedz)

    Hi,

       I'm in Pal Land, but when I shoot with my little Panny STD750, I sometimes shoot 1080/50p. I convert my clips to Pro Res LT and then I have two choices in FCP, I can pop a clip onto my timeline and when it asks if I want to change my sequence to match my clip settings I click "yes" and edit in a 50fps timebase sequence. I then export and take my movie into Compressor and change the framerate to 25 when encoding.

    If  I want to edit in a 25fps sequence, I create a new sequence and go to sequence settings and set /aspect ratio to "HDTV 1080i (16:9)"  Pixel aspect ratio "square",  Field dominance "none",  Editing Timebase "25" and compressor "Apple pro res LT"  I can then edit in a 25fps sequence. FCP just drops every other frame.

    Either way is ok for me.

    Hope this makes sense.

    DM

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