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