NCast Telepresenter M4 - Manual (Page 53)

NCast Telepresenter Reference Manual
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.
4.3.4. 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.
4.3.5. 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.
4.3.6. Transcode n
The H.264 MPEG-4 file format is becoming the industry standard for webcasting, streaming and other video
distribution uses. The mainstream media players (Flash, Quicktime and Silverlight) now support this common
format for video-on-demand playback. A Telepresenter is now able to transcode high-quality MPEG-4 Part 2
or 10 files into four different H.264 or Theora formats (Also VC-1 for the M4W), with selectable resolution
sizes and bit-rates. A high-bit-rate file can be created for local distribution; a medium quality file can be
created for DSL and cable modem clients, and a low-bit-rate, low-resolution version can be created for iPods
and other mobile devices.
Theora is an open-source codec required for use in some countries and for HTML-5 use in some browsers.
Also, some websites will only be supporting codecs that are not encumbered by patents, a claim made by
the Theora developers.
The original file and the four transcoded files will be automatically uploaded via FTP or SFTP to the video-
on-demand server specified on the Upload page.
Transcoding options are shown on the Modify Channel page when a Transcode box is checked. Here you
can assign a resolution, graphics bit-rate and a filename to each H.264 or Theora file. The audio track is
moved to the H.264 file without any changes. You may keep your original MPEG-4 file by unchecking the
"Remove original archive" option. Otherwise when transcoding is finished the original archive is deleted.
For best results you should choose wisely the graphics bit-rate and graphics capture size. Setting the highest
possible graphics bit-rate is recommended for optimum transcode quality. The Graphics Capture size should
match the H.264 size (or highest H.264 size if transcoding to multiple files). We recommend using values
dividable by 16. Transcoding is done when the Session is off and can take a very long time. Don't power off
or reboot the unit when transcoding a file because the whole process will be restarted. Transcoding adds a
new special parameter "%t" which can be used in filename format string and in the FTP/SFTP upload
directory - it will be filled with transcode number (1 to 4) or skipped (original recording).
4.3.7. Remove Original Archive
Uncheck this box to retain the original MPEG-4 archive file after all transcode operations have finished. If
only the transcoded output is desired, leave it checked.
The original MPEG-4 file may be larger in resolution and size than is needed for distribution to viewers.
However, for archival purposes it may be desirable to keep the high-quality original. Also, some video editing
tools may find MPEG-4 Part-2 files easier to deal with than the H.264 equivalents.
4.3.8. 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.
4.3.9. Optimize MP4 Layout
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