Sequence - Select a length for the sequence (the maximum length will be determined by the standard you are in, and the mount of RAM fitted on your system). When you press Grab, the unit starts recording a sequence of images, of the duration previously set. This sequence may later be saved as a .avi file.
If you also have the Advanced Option on your system, you can select the "Record Full Frame", so that image/sequence grabs also grab the ancillary data, including embedded audio, and timecode data, closed caption data etc, and all of this data will be stored along with the image data. If this control is not checked, then only the active portion of the video is grabbed. See below for more detail on full frame images.
When you have finished grabbing your image(s), select ‘Done’. You will be returned to the standard OmniTek desktop, with your grabbed images loaded into the Generator window. Any images you wish to retain will need to be saved. This can be done by right clicking on an image/sequence, and selecting ‘Save As’, in the usual fashion.
Full Frame Record/Playback (Advanced Option only)
The Advanced Option for XR provides the new ability to record or playback video, including the full video raster, such that all embedded audio, ancillary data etc, is captured with the video data.
Images and sequences grabbed as full raster may only be saved to disk in *.rvf (raster video file) format, and are saved in the usual way. Sequences are saved as multiple rvf files, all saved to the specified directory, with an incrementing number appended to the base file name that you specify. To load a rvf sequence for playback, simple select multiple rvf files with a contiguous, incrementing number in the filename.
The rvf file format is an OmniTek file format that contains a header, followed by the raw data from the serial bitstream. No processing is done on the video before it is stored, so the original colour space is preserved intact. Details on the file format will be made available to any interested parties.
The video data is not compressed in any way. This means that the RAM on the OmniTek card will hold fewer frames of rvf video as opposed to standard video. On the status line of the application, the number of free frames and number of frames used has been updated to contain two sets of numbers, separated by a '/' character. One number shows the number of frames in rvf format, whilst the other number shows the number of frames for standard video frames.
Important Note
When playing rvf files, it is important to note that some of the video insertion modes are not compatible with the full raster playout. For example, if a clip is grabbed, including the embedded audio, video index information, VITC etc, then when the clip is replayed, you probably want this embedded data to be replayed with the video. In this case, it is not possible to use XR to insert audio tones, or VITC etc onto the serial output. In case you wish to overwrite the grabbed embedded data with values that are inserted by XR, we have provided a control on the Generator page of the Video setup dialogue, which is part of the Engineering controls for the main OmniTek application.
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