iPump 6420 User’s Manual
stored to the /u/user/showshifts directory. In the Events file, all Compel commands which were associated with the audio stream while being recorded are themselves recorded. These are stored with precise timestamps indicating the exact time the command is to be executed, relative to the beginning of the episode. For instance, if a Associated Audio Compel command to play a playlist is encountered, and if the playlist and its referenced files exist, then a playlist insert is done in the live audio track. This is done during the playback, just as is done in normal operation if receiving the original live satellite broadcast. In addition, for every audio outage seen in the audio stream during recording, an Event is listed, showing the start and duration of the outage. The significance of this on playback is this: For short outages, the Decoder will output silence. For outages exceeding a threshold (“LOS threshold”), the Decoder will, after a delay (“LOS delay”), play audio from a playlist named “LOA”.* Note that the audio outages may be from any source, whether the unit is reboot, the satellite carrier fades out, uplink failure, or any other event that prevents valid MPEG audio from being available to the record process.
* Called LOA only to differentiate from the already used “LOS”.
The limits on ShowShift capabilities are as follows: Even while all three Decoders (ports) may be busy playing live audio, or playing back shifted Showshift episodes, or playing other file audio, the i6420 may support two simultaneous Showshift episode recordings. This restriction should be enforced in the user web interface, but if an expected Show episode fails to record, the user should check for conflicts. Note that a showshift playback is considered permanent while it is in progress. If the unit should reboot during a showshift playback, then playback resumes if not completed. But because Showshifting depends on the Local Scheduler, the unit must be up and running at the show episode record start time and at the shift playback start time. If either is missed, the episode may not record, or it may not play back. When Showshift episode playback finally does end, on a Decoder, then that Decoder resumes its normal permanent activities. If any Compel commands arrive during playback that are Associated with the audio stream which is the normal permanent setting for that Decoder, then these are discarded (if no other recording is taking place). Compel commands directed to the unit itself are always obeyed, regardless of ShowShift activities, except that if the permanent assignment for the Decoder doing playback changes, that change only takes affect after the episode playback is completed.
Note that it is the showshift definitions that end up driving iPump6420 actions. For any episode of a defined Show, if there are no showshifts defined at the start time of the episode, then that episode is not recorded!
During ShowShift ongoing operations, many recorded files will be created, both *.mp2 and *.evt. The name of each will include the
Logging of ShowShift operations is similar to normal operation. When a record or playback starts or ends, there will be an Ops Log entry. During playback, if any cue relay closures, those are also logged. During playback, if any local file or playlist inserts, those are logged to the As- run log.
ShowShifting authorizing keyfile names
ShowShifting authorizing keyfiles are named
User Indications and controls
The relevant indicators are:
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