NCast Presentation Recorder Reference Manual
Acct101-2007-11-23.mp4
…
Using this formatting notation, the default value of the format string for standard archive filenames is this:
%Y%m%d-%H%M%S-%n
The counter variables start at 0001 or 000001 and go to 9999 or 999999. Only one counter variable is
permitted per filename. The counter’s next value is calculated by scanning existing archives which match the
filename template. The filename with highest counter value is discovered and the counter value found is
incremented by one. If all files are removed the counters will start again from 1.
If a newly created archive filename conflicts with an existing archive, a suffix _
n (
_1, _2, _3, … ) is added to
the new name to avoid overwriting an existing file.
4.3.4.
Archive Title
Enter information about the Title of the session being recorded (e.g. class or course number, conference
session title, meeting name, etc.). This information is entered as meta-data about the recorded archive and
will be captured in the .xml data file associated with the archive.
4.3.5.
Archive Presenter
Enter information about the Presenter of the session being recorded (e.g. class professor or instructor,
conference session speaker, meeting chairperson, etc.). This information is entered as meta-data about the
recorded archive and will be captured in the .xml data file associated with the archive.
4.3.6.
Archive Description
Enter additional descriptive details about the event, the presenter, the topic or background of the recording.
This description field will be used, for example, in automatically creating RSS feeds for the recording once it
has been uploaded to an N-Way server.
4.3.7.
Add MP4 Hint Tracks
Streaming servers require some additional information about the contents of a media file to optimize delivery
for remote clients. An additional track, called a hint track, contains this information. If the file is to be used
with a streaming server this option must be checked. If streaming is not required, uncheck to save on file
processing and to reduce the file size.
4.3.8.
Optimize MP4 Layout
Sometimes a media file is placed on a web server and is played without the assistance of a streaming
server. In such instances the location of the media data required for progressive download needs to be
optimized. Optimization rearranges the audio and video blocks within the file. Optimization does not
significantly affect the size of a file, but adds slightly to the post-Session processing time required. Uncheck
this box if files will not be used in progressive download environments.
4.4. C
HANNEL
S
ETTINGS
- L
AYOUT
4.4.1.
Frame Size
The Frame Size defines the dimensions of the Frame, a surface (capture surface or “the canvas”) which is
the primary imaging surface on which the composite image (Main PIP Overlays) is
drawn. The resolution and aspect ratio of the transmitted or archived media stream aligns exactly with the
resolution and aspect ratio of the Frame. Consequently, selection of one of the default frame sizes and
aspect ratios, or definition of a custom Frame Size and possibly a custom Aspect Ratio is the first step in
defining the format of the media stream which will be produced by the Presentation Recorder. The Frame
can have any dimension or aspect ratio, with the limitation that the maximum dimensions are 1280 x 720.
Once the frame is defined, the next step is the (X,Y) placement and (W,H) sizing of the primary or “Main”
image stream. Typically the “Main” stream is sized at “Full-screen” which means that the primary stream is
scaled to the full dimensions of the frame. It is useful to note, however, that the primary stream can be
dimensioned to a smaller size than the full frame size. The unused space might then be reserved for the
NCast Corporation
Revision 1.1
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