• Apple Final Cut Pro Legacy

  ProRes422 puzzle

  Posted by Adam Taylor on June 9, 2007 at 2:35 pm

  I have been trying a couple of tests using the ProRes codec (both sd & hd flavours) and have come across a puzzling behaviour.

  I was given a dvd that needed re-cutting, and unfortunately it had been coded as a dvd (not just video files transported on a dvd) so i put the files through Mpeg Streamclip and decided to encode to ProRes422. This seemed to work well, and upon starting FCP6 loaded the file into a new project. I was asked if the timeline should be altered to match the footage and i chose yes.

  Now for the odd bit. The timeline showed no coloured render bars, and the file did play. BUT it played in a converted image size. Whilst playing, the image seemed to be stretched sideways so that the right hand side of the picture was offscreen. As soon as i hit stop, the still image showed correctly. When you are jogging thorugh looking for a cut point, this gets really annoying and distracting. I have noticed it does this with both hd and sd versions – i could understand the hd one resizing on the fly, but sd as well?

  Is there anything obvious that i’m missing here?

  I’m thinking i might just stick to uncompressed 10bit !

  I’m working in PAL, on a quad G5, FCS2, Xserve raid, Kona 3 card.

  adam

  Editor/Mixer
  Character Options Ltd
  Oldham, UK

  Chris Borjis replied 18 years, 11 months ago 3 Members · 3 Replies
• 3 Replies

• 

  Ben Insler

  June 9, 2007 at 9:21 pm

  My guess is that this has something to do with the way you encoded the clip. For some reason, while the clip is playing, final cut it interpreting it with a different pixel aspect ratio, and thus stretching the clip. Try re-encoding the already converted ProRes422 file through compressor, and make sure you’re sending it out with the appropriate resolution AND pixel aspect ratio. I’ve seen ProRes422 firsthand and it seems to work very well – I would doubt that it’s a FCP playing ProRes422 problem alone.

  -Ben
• 

  Adam Taylor

  June 10, 2007 at 11:18 am

  thats what i was thinking Ben.

  Its probably something to do with the options in Mpeg Streamclip. None of its available options seem to account for 16:9 sd.

  rgds

  Adam

  Editor/Mixer
  Character Options Ltd
  Oldham, UK
• 

  Chris Borjis

  June 10, 2007 at 9:56 pm

  [lightning ad] “None of its available options seem to account for 16:9 sd.”

  That wouldn’t help anyway since fcp and all editing/compositing apps I’m aware of don’t interpret 16:9 clips as that, it sees all as 4:3 with the option to set them as 16:9

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