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mediastreamsegmenter(1) 	   BSD General Commands Manual		  mediastreamsegmenter(1)

     mediastreamsegmenter -- Create segments from MPEG-2 Transport streams for HTTP Live Stream-

     mediastreamsegmenter [-b | -base-url <url>] [-t | -target-duration duration]
			  [-f | -file-base path] [-p | -program [duration]]
			  [-i | -index-file fileName] [-s | -sliding-window-entries entries]
			  [-S | -start-index-file-count entries] [-D | -delete-files] [-v]
			  [-g | -generate-key [period]] [-k | -encrypt-key file]
			  [-K | -encrypt-key-url <url>] [-audio-only] [address:port]

     The mediastreamsegmenter is a command-line tool that segments media for deployment using
     HTTP Live Streaming.  The mediastreamsegmenter receives an MPEG-2 transport stream over UDP
     at [address:port] or over stdin and divides it into a series of small media files of approx-
     imately equal durations. The mediastreamsegmenter also creates an index file containing ref-
     erences to the individual media files.  The index file and media files can then be deployed
     using common web server infrastructure.

     The mediastreamsegmenter can produce either live or video-on-demand (VOD) streams.  For live
     streams, the transport stream from the media encoder is ingested, new media files are cre-
     ated and the index file is periodically updated (and older media files expired and deleted).
     This type of stream is suitable for continuous broadcasts.

     With VOD streams, small media files representing the entire duration of the presentation are
     created by the mediastreamsegmenter and an index list containing all segments is generated.
     This kind of stream allows the client access to the entire program at once.  A VOD stream
     can also be viewed in-progress, giving the user access to an entire event while it is hap-

     The mediastreamsegmenter can encrypt the segments using AES-128 encryption.

     To end a session, use the control-C.  An end of file tag will be added to the index file.

     The mediastreamsegmenter command accepts the following arguments:

     -b | -base-url <url>
	   Specifies a base url to add to the media file name when written into the index file.

     -t | -target-duration duration
	   Specifies a target duration for the media files.  The default duration is 10 seconds.
	   The duration is calculated by looking at the PTS/DTS in the Video transport stream

     -f | -file-base path
	   Directory to store the media and index files.

     -p | -program [duration]
	   The program option specifies that a VOD style program is being captured. The
	   [duration] parameter is specified in minutes. To capture an open-ended performance,
	   leave off the [duration] parameter and stop the session by hitting control-C.

     -i | -index-file fileName
	   This option defines the index file name.  The default is prog_index.m3u8.  It is rec-
	   ommended that the index file have an extension of .m3u8 or .m3u.

     -s | -sliding-window-entries entries
	   This option defines the number of media file entries that should be kept in the index
	   file.  The default is 5.

     -S | -start-index-file-count entries
	   This option defines the number of media file entries that must be present before the
	   first index file is written.  The default is 3.

     -D | -delete-files
	   In a live stream, this option will specify that the media files that are no longer in
	   the index file will be removed after an expiry period.

     -g | -generate-key [period]
	   The -generate-key option will generate an encryption key.  If [period] is not speci-
	   fied, it will generate the key 1 time.  If [period] is specified, the key will rotate
	   every [period] media files.	The -generate-key option requires a -encrypt-key option.

     -k | -encrypt-key file
	   Specifies an encrypt key file if the -g command is not present.  Specifies an encrypt
	   key file if the -g command is present without the period parameter (single encryption
	   file for the entire session).  Specifies the directory to store the rotating encryp-
	   tion key if the -g period parameter is specified.

     -K | -encrypt-key-url <url>
	   HTTP base URL for the encrypt key file to write into the index file.

	   Strips the audio elementary stream (AAC/ADTS or MP3) and writes it into the media

     The mediastreamsegmenter will only work with MPEG-2 Transport Streams as defined in ISO/IEC
     14496-1.  The transport stream must contain H.264 (MPEG-4, part 10) video and AAC or MPEG
     audio.  If AAC audio is used, it must have ADTS headers.  H.264 video access units must use
     Access Unit Delimiter NALs, and must be in unique PES packets.

     mediastreamsegmenter -b http://foo.com/stream -s 3 -D -f /Library/WebServer/Documents/stream

     Captures and creates unencrypted Live stream.  The index file can be downloaded at
     http://foo.com/stream/prog_index.m3u8.  In steady-state, the index file will contain 3
     items.  mediastreamsegmenter -b http://bar.com/hiRes -p 120 -f
     /Library/WebServer/Documents/hiRes -g 15 -k /Volumes/SecureServer/Protected -K

     Captures and creates an encrypted VOD stream.  The encryption key is on a different server,
     and is accessible via https.

Mac OS X				  April 28, 2009				 Mac OS X
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