Caption Extract Profiles
The purpose of the Caption Extract Encoder is to write the extracted closed caption data from the video source into various output formats.
This section includes the following topics:
•Introduction to the Caption Extract Encoder
•Understanding Caption Extract Settings
•Creating a Caption Extract Profile
•Adding a Caption Extract Profile to a Job Profile
Introduction to the Caption Extract Encoder
The Cisco MXE 3500 Preprocessor extracts all closed caption data from the video source. The purpose of the Caption Extract Encoder is to write the extracted data into various output formats. To accomplish this, create a Caption Extract Profile and add it to the Job Profile. See also: Creating a Caption Extract Profile and Adding a Caption Extract Profile to a Job Profile.
Find a description of the settings available in the Caption Extract encoder profile in the "Understanding Caption Extract Settings" section.
Understanding Caption Extract Settings
Each Caption Extract Profile includes the following sections:
•Common (Caption Extract Profile)
•Settings (Caption Extract Profile)
Common (Caption Extract Profile)
Figure 3-1 shows the Common section. Table 3-1 describes the settings.
Figure 3-1 Caption Extract Profile: Common Section
Table 3-1 Caption Extract Profile: Common Settings and Descriptions
Check this box enable this profile for job processing.
Sets the execution mode for this task: standard, fast start, or immediate.
•Standard: The Cisco MXE 3500 generates an intermediate uncompressed AVI file as the output of the preprocessing step.
•Fast Start: Fast Start reduces the total time required to process a job by starting the encoding process as soon as enough of the image has been preprocessed, rather than waiting for the preprocessing to be completed. You may choose to use this feature when submitting large jobs.
Because Fast Start encoding utilizes available computer processing cycles, the Cisco MXE 3500 will use Fast Start encoding only under the following circumstances:
–If at most one other clip is currently encoding
–If there are no webcasting jobs in progress
–If bumpers and trailers are not specified in the preprocessing profile.
•Immediate: If you enable Immediate Encoding, the Cisco MXE 3500 will not use an intermediate file, but uses a memory-based interface between the preprocessor and the encoders. This is extremely useful for longer input clips and/or formats with high data volumes, such as MPEG or OMF, where the disk space requirements for intermediate files could become prohibitive.
Note Since Immediate Encoding uses more memory resources and allows the encoder to control the rate at which the preprocessor provides data, it is not suitable for Live capture situations, only for file jobs.
The data entered in this field will appear anywhere $(user-data) occurs in the XML.
An example: If you want to include the title "Nightly News" in the output file name, you would, in the Encoder Profile, set User Data to: Nightly News. Then, in the Output Profile, set the Output Filename to include $(userdata).
Settings (Caption Extract Profile)
Figure 3-2 shows the Settings section. Table 3-2 describes the settings.
Figure 3-2 Caption Extract Profile: Settings Section
Table 3-2 Caption Extract Profile: Settings and Descriptions
Select the output format: SCC, XML, or W3C.
Creating a Caption Extract Profile
Use this procedure to create a Caption Extract Profile.
Step 1 From the Toolbox, click Profile Management > New Profile.
Step 2 From the New Profile pop-up Profile Class drop-down, select Caption Extract, as shown in Figure 3-3.
Figure 3-3 Creating New Caption Extract Profile
Step 3 Click the New Profile button. The New Caption Extract Profile page displays.
Step 4 Enter the appropriate settings, and click Save.
Adding a Caption Extract Profile to a Job Profile
Step 1 From the Toolbox, click Profile Management > New Profile or Open Profile.
Step 2 From the Profile Class drop-down, select Job, and click the New Profile or Open Profile button.
Step 3 Expand the Encoding section.
Step 4 Highlight one or more individual Caption Extract Profiles. As they are selected, the Encoder Profiles are added to the Job Profile in the upper pane, as shown in Figure 3-4.
Step 5 Click Save.
Figure 3-4 Adding a Caption Extract Profile to a Job Profile