Abekas Mira User's Operation Manual - Timecode
User Operations Guide—Mira Instant Replay Server
72
Copyright ©2014, Abekas Incorporated
Revised: 5 September 2014
Timecode
Timecode metadata can be modified two different ways:
Through the Clip Modify dialog window
(please see Modifying Clip Metadata — Clip Modify Dialog on page 63 above)
Through the Clip Library in Mira Explorer
(please see Modifying Clip Metadata — Direct Method on page 66 above)
The “TC Source” parameters determine which timecode value to use when playing back the given clip.
External TC - First Frame Only — when selected, forces the clip to use the external timecode that was originally recorded along
with the clip when it was first recorded from the digital video input (HD-SDI or SD-SDI).
Only the timecode at the first frame of clip is used; the timecode in the remainder of the clip is synthesized.
Use this setting if there was a “break” or interruption in the timecode stream that had occurred during recording;
Use this setting if the clip in question is an “ISO” multi-angle clip—because this setting will ensure the fastest seek to distant
locations within the clip when using external controllers via RS422 serial control.
External TC - Entire Clip Length — when selected, forces the clip to use the external timecode that was originally recorded along
with the clip when it was first recorded from the digital video input (HD-SDI or SD-SDI).
The timecode over the entire length of the clip is used.
Use this setting if you wish to maintain all “breaks” or interruptions in the timecode stream that had occurred during recording; for
example, if the source video consisted of several segments—each segment with their own unique timecode range.
Striped Starting At: — when selected, uses internally-generated (or “synthesized”) timecode, with a defined starting timecode for
the first frame of the clip. The timecode then increments from the defined value as the clip is played forward.
Use this setting if you wish to eliminate any and all “breaks” or interruptions in the timecode stream that had occurred during
recording.
The “Dropframe Flag” parameter appears only when the clip in question has a frame rate of 59.94 (i.e. 525/59.94i; 1080/59.94i; or
720/59.94p) and determines whether to use “drop-frame” or “non-drop frame” timecode while playing back the given clip.
External TC - First Frame Only — when selected, forces the clip to use the external timecode that was originally recorded along
with the clip when it was first recorded from the digital video input (HD-SDI or SD-SDI).
Only the timecode at the first frame of clip is used; the timecode in the remainder of the clip is synthesized.