• Apple Final Cut Pro Legacy

  IMX @648 vs. IMX @720

  Posted by Ruben Centineo on October 25, 2010 at 6:06 pm

  Hi,

  Someone can help me to understand why have two different image size whit the same codec IMX?

  Yes, I have several quicktime movie files some of them has 648×486 an others 720×486 all IMX 525/60 @30 Mbps

  At FCP you can see all of them with 720×486 as image size and IMX 525/60 @30 Mbps as a codec and all are shown well at canvas, no size or aspect modification at motion tab. There is no difference at all.

  But at quicktime player 7 or 10 you can see the different width, 648 is narrower than the 720. I’ve tried to modify the width value in quicktime playe 7 and back to FCP but with the new fil FCP saiy unsuppoted or unknow codec.

  My problem is that I want to do some process at QT player 7 and I have unexpected results.

  Someone has any idea?

  Ruben Centineo

  Devin Crane replied 15 years, 10 months ago 2 Members · 1 Reply
• 1 Reply

• 

  Devin Crane

  October 26, 2010 at 1:32 am

  Quick Time is compensating for the pixel aspect ratio, computers use square pixels while IMX NTSC uses round or oval pixels, thus QT is having to change the aspect so that it looks correct, otherwise it would look squished. Your video is still encoded at 720×486 even though it may not play at 720 on a computer screen.

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