kopia lustrzana https://github.com/F5OEO/tstools
96 wiersze
2.5 KiB
Groff
96 wiersze
2.5 KiB
Groff
.\" The following commands are required for all man pages.
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.Dd October 28, 2015
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.Dt STREAM_TYPE 1
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.Os
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.Sh NAME
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.Nm stream-type
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.Nd Guess the type of a stream file
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.\" This next command is for sections 2 and 3 only.
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.\" .Sh LIBRARY
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.Sh SYNOPSIS
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.Nm stream-type
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.Op Fl "err stdout"
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.Op Fl "err stderr"
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.Op Fl verbose | Fl v
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.Op Fl quiet | q
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.Ar in_file
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.Sh DESCRIPTION
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Attempt to determine if an input stream is Transport Stream,
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Program Stream, or Elementary Stream, and if the latter, if it
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is H.262 or H.264 (i.e., MPEG-2 or MPEG-4/AVC respectively).
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The mechanisms used are fairly crude, assuming that:
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.Bl -dash
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.It
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data is byte aligned
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.It
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for TS, the first byte in the file will be the start of a NAL unit,
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and PAT/PMT packets will be findable
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.It
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for PS, the first packet starts immediately at the start of the
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file, and is a pack header
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.It
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if the first 1000 packets could be H.262 *or* H.264, then the data
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is assumed to be H.264 (the program doesn't try to determine
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sensible sequences of H.262/H.264 packets, so this is a reasonable
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way of guessing)
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.El
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It is quite possible that data which is not relevant will be
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misidentified
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.Ss Files
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.Bl -tag
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.It Ar in_file
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is the file to analyse
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.El
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.Ss Switches
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.Bl -tag
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.It Fl "err stdout"
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Write error messages to standard output (the default)
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.It Fl "err stderr"
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Write error messages to standard error (Unix traditional)
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.It Fl v , Fl verbose
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Output more detailed information about how it is making its decision
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.It Fl q , Fl quiet
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Only output error messages
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.El
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.\" The following cnds should be uncommented and
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.\" used where appropriate.
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.\" .Sh IMPLEMENTATION NOTES
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.\" This next command is for sections 2, 3 and 9 function
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.\" return values only.
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.Sh RETURN VALUES
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The program exit value is:
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.Bl -tag
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.It 10
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if it detects Transport Stream,
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.It 11
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if it detects Program Stream,
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.It 12
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if it detects Elementary Stream containing H.262 (MPEG-2),
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.It 14
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if it detects Elementary Stream containing H.264 (MPEG-4/AVC),
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.It 5
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if it looks like it might be PES,
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.It 9
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if it really cannot decide, or
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.It 0
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if some error occurred
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.El
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.\" This next command is for sections 1, 6, 7 and 8 only.
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.\" .Sh ENVIRONMENT
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.\" .Sh FILES
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.\" .Sh EXAMPLES
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.\" This next command is for sections 1, 6, 7, 8 and 9 only
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.\" (command return values (to shell) and
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.\" fprintf/stderr type diagnostics).
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.\" .Sh DIAGNOSTICS
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.\" .Sh COMPATIBILITY
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.\" This next command is for sections 2, 3 and 9 error
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.\" and signal handling only.
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.\" .Sh ERRORS
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.Sh SEE ALSO
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.Xr esdots 1 ,
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.\" .Sh STANDARDS
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.\" .Sh HISTORY
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.\" .Sh AUTHORS
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.\" .Sh BUGS
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