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66 lines
3.0 KiB
66 lines
3.0 KiB
4 years ago
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IBP support for transcode
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This is the web page about IBP and related tools
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http://loci.cs.utk.edu/
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Binary utilities can user lors URI for input and/or output file.
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If we want to access file in the IBP depot then URI in form
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lors://host:port/local_path/file?bs=number&duration=number&copies=number&threads=number&timeout=number&servers=number&size=number
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is used. User can also use the short form URI
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lors:///local_path/file
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When we want to read an IBP file, the local_path/file specifies local file
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where is stored exNode with XML specification. When writing an IBP file the
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local_path/file specifies local file where to store exNode with XML
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specification of IBP depots used.
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The paremeters in the full form of URI mean as follows:
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host specification of L-Bone server location
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port specification of L-Bone server port (default 6767)
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bs specification of block-size for transfer in megabytes (default 10)
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duration specification of allocation duration in seconds (default 3600s)
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copies specification of number of copies (default 1)
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threads specification of number of threads (concurrent TCP streams) (default 1)
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timeout specification of timeout in seconds (default 100)
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servers specification of number of unique IBP depots (default 1)
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size specification of assumed file size in bytes (default 10MB)
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There are environment variables that can be used instead of URI parameters for
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the LoRS layer.
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LBONE_SERVER specifies L-Bone server location
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LBONE_PORT specifies L-Bone server port (default 6767)
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LORS_BLOCKSIZE specifies block-size for transfer in megabytes (default 10)
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LORS_DURATION specifies duration of allocation in seconds (default 3600s)
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LORS_COPIES specifies number of copies (default 1)
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LORS_THREADS specifies number of threads (concurrent TCP streams) (default 1)
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LORS_TIMEOUT specifies timeout in seconds (default 100)
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LORS_SERVERS specifies number of unique IBP depots (default 1)
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LORS_SIZE specifies assumed file size in bytes (default 10MB)
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At least LBONE_SERVER or host must be set.
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Transcode program can be used in almost traditional way. If we want to store
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the file to the IBP depot then URI in form lors:///local_path/file is used
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instead of local file name. The environment variables should be set unless user
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specifies URI in its full form. The same form of URI can be used for loading
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the file from the IBP depot. Transcode can read and write ordinary local files
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as well. The prefix lors:// is required for accessing IBP, otherwise local file
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is used.
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For example:
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LBONE_SERVER=our.ibp.host;
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transcode -i lors:///video.dv.xnd -P1 -N 0x1 -y raw -o lors:///temp1-remux.avi.xnd -E 44100,16,2 -J resample
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Transcode will use source file identified by serialized description of IBP
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exNode stored in video.dv.xnd file on local disc in the current directory. The
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L-Bone server location is taken from environment variable (referring to
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our.ibp.host) and resulting serialized exNode XML description will be
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stored in the current directory as temp1-remux.avi.xnd
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