• Blackmagic Design

  HD 1080i 25 Hz automatic down-conversion, bug?

  Posted by Hans Von sonntag on June 19, 2005 at 9:04 pm

  Hi,
  my setup: G5, HD Pro dual link, HDLink, OSX 4.1, fcp 4.5, BM 4.8

  The problem: I captured from HDCAM deck 25p footage. Works well in the timeline,
  all set to HD 1080i 25 Hz. On the 23″ screen (set to 25 Hz), using HDLink, the footage is
  unfortunately projected only in SD. If I swich the timeline-settings to HD 1080i 24 Hz
  the footage on the 23″ display is full HD-resolution. Logically camerapans show a frequent hickup
  due to the 24 fps, remember display is set to 25Hz.
  Does anybody know why the projection of HD 1080i 25 Hz is automatically downconverted to SD
  and not showing proper HD resolution although footage is shot in 25 Hz?
  And why does it work with HD 1080i 24 Hz?
  Any idea may help.

  thank you very much in advance,

  Hans v. Sonntag

  Hans Von sonntag replied 20 years, 11 months ago 3 Members · 3 Replies
• 3 Replies

• 

  Juan Salvo

  June 19, 2005 at 10:19 pm

  In the system prefrences under the Decklink tab, there is a down conversion setting…. make sure it’s set to off.
• 

  Andrei-cristian Murgescu

  June 20, 2005 at 3:26 pm

  More precise.
  Go into the Decklink HD Pro Settings. On the right side of the window check if HDTV Downconverter is set to “OFF”.
• 

  Hans Von sonntag

  June 20, 2005 at 8:08 pm

  Thank you very much for your help!
  Got things sorted out and finally installed FCP 5.0.
  All works fine now. Great!

  Hans v. Sonntag

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