Specifications

Appendix A: 24fps Workflows 53
appendix a
24fps Workflows
Audio Layback to Video
Although you cannot output 24P video to a
video recorder with Pro Tools, you can “Punch
Down” by adding audio that has been posted to
a 24P video clip in Pro Tools to videotape that
was created on another video system.
Playing in Sync with 24 fps Video Tapes
To playback synchronized to a video transport
playing at 24 fps:
1 In Pro Tools, open the Session Setup window
(Windows > Session Setup)
2 Set the Frame Rate to 24 fps.
3 Slave Pro Tools to the video transport.
– or –
If the MachineControl option is installed, select
the appropriate profile to control the video
transport.
Playing in Sync with 29.97 fps (NTSC)
Video Tapes
To play in sync with a 29.97 fps video created from
a 24 fps source:
1 Slave Pro Tools to the VTR.
2 Choose Windows > Show Session Setup.
3 From the Frame Rate pop-up menu, select
29.97 FPS.
4 In Pro Tools, from the Audio Rate Pull
Up/Down pop-up menu, select 0.1% Down.
Pro Tools with AVoption|V10 does not sup-
port 24 or 23.976 fps video output. Though
24 and 23.976 fps video clips are sup-
ported, the actual output of Pro Tools is
limited to NTSC (29.97 fps) and PAL (25
fps) standards. On playback, the 24 fps
clips are converted in software to these stan-
dards. The conversion can produce visible
artifacts. Therefore, Pro Tools video play-
back is intended for monitoring purposes
only, and is not suitable for professional
layback or broadcast, regardless of the reso-
lution or frame rate of the video clip. Out-
put from Media Station|V10 is professional
quality.
For more information on slaving Pro Tools
to the VTR, see the Synchronization chap-
ters of the
Pro Tools Reference Guide.
Audio pull-down is required when you are
posting to a 29.97 fps video clip made from
a 24 fps source. This is because the 24 fps
source is also “pulled down” by the telecine
process which produces the 29.97 fps tape.