override - (ntsc only) many vtrs with a 422 control port send a signal that allows the program to determine if it is using a drop frame (;) or non-drop frame (:) timecode. if your vtr does not have this feature, check the override check box and choose the appropriate timecode format from the radio buttons below it.
drop frame/non-drop frame - (ntsc only) non-drop frame labeling uses 30 frames per second (fps). ntsc video it is actually captured at 29.97 fps, not 30 fps, so a project with a duration of one hour using non-drop frame timecode labels has a run time of 1 hour, 3.6 seconds. therefore, when you use non-drop frame timecode labeling, the timecode is always be a little shorter than the actual running time of the video, although it is close enough for many uses.
drop frame labeling "drops" some of the frame labels (the 2 frame labels at the beginning of each minute except each 10↑th minute). over one hour, 108 labels, or the labels for 3.6 seconds are dropped, exactly the amount it is over using non-drop frame labeling. thus a 01:00:00;00 drop frame timecode label corresponds to exactly 1 hour of video. (note the semi-colon in the drop frame label.) no actual video frames are "dropped".
use the radio buttons button to select ndf/df timecode labeling for your captured clips. this is the timecode that will be used for your clip when you use any function that references the timecode, such as trimming the clip, adding index points, or viewing the duration of the clip.
you can also change the timecode labeling of clips in the gallery or timeline. right click on the clip and select edit time-code.
· timecode type - if you are capturing from a vtr and not a dv device, select the type of timecode your vtr sends. dpsvelocity has two timecode options when capturing from analog tape. ltc (longitudinal timecode) is designed to be recorded on standard audio tape. when recorded to video, ltc is placed on one of the linear audio tracks of the video tape. ltc is the original smpte timecode standard; older video tapes, if they contain timecode at all, will be striped with ltc. vitc (vertical interval timecode) is recorded within the video picture, during the vertical blanking interval. it can be present in a video signal without being visible on screen. compared to ltc, vitc offers two distinct advantages for video editing: it can be read from a still frame; and it provides field-rate (half-frame) accuracy. where video and multi-track audio transports must be synchronized, both vitc and ltc may be used together. in audio-only productions, ltc is normally used.
dpsvelocity acquires its timecode for batch capture through the rs-422 port or ieee-1394 cable, not as a part of the video signal.
timecode labels video frames incrementally, using a hh:mm:ss:fr (hours : minutes : seconds : frames) format.
when you have chosen dv as your input device, the above does not apply, since dv always uses drop frame timecode.