AJA Control Room - Manual (Page 21)

AJA Control Room v1.0 www.aja.com 21
6. Compare the first two frames of the burned-in timecode of the capture with the
timecode values in the dashboard’s Current Position Indicator (CPI).
7. If the capture resulted in a timecode beginning a frame before the CPI, adjust the
offset by adding a frame. Conversely, if the clip was late, decrease the offset.
As you perform more trial captures, you may see a variance in frame accuracy. If so, you
can use the tenth-of-a-frame offset (beginning with five-tenths) to make more subtle
adjustment until the clip timecode and CPI consistently match.
NOTE: 720p 50 to 60 fps formats actually records 2 frames for each timecode frame value. For frame
accuracy you must check that the timecode value does not change for the first two frames of
video.
Edit-to-Tape Timing
For Edit-to-Tape Timing you enter frame values in the Output Offset field in Serial
Preferences. AJA Control Room must begin playout so that the correct frame is on-air at
the edit IN point.
Edit Adjustment Procedure: Begin the procedure by doing a test edit.
1. Using a clip with timecode burn-in, select a CPI point marking the desired edit IN.
2. Set a 2 second Duration or an OUT Point.
3. Click the Tape start button to perform the edit.
4. When the edit is complete, roll the tape back to the
edit IN point and verify that the first frame that was
captured on tape was the frame you expected.
5. If the edit begins a frame early, adjust the offset by
adding a frame. Conversely, if the clip was late, decrease the offset.
As you perform more trial edits, you may see a variance in frame accuracy. If so, you can
use the tenth-of-a-frame offset (beginning with five-tenths) to make more subtle
adjustment until the edit is consistently frame-accurate.
Again, for video formats of 720p 50 to 60 fps, refer to the Note above.