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STREAM_TYPE(1) General Commands Manual STREAM_TYPE(1)

NAME

stream-type — Guess the type of a stream file

SYNOPSIS

stream-type [-err stdout] [-err stderr] [-verbose | -v] [-quiet | -q] in_file

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:

  • data is byte aligned
  • for TS, the first byte in the file will be the start of a NAL unit, and PAT/PMT packets will be findable
  • for PS, the first packet starts immediately at the start of the file, and is a pack header
  • 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)
It is quite possible that data which is not relevant will be misidentified

Files

in_file
is the file to analyse

Switches

Write error messages to standard output (the default)
Write error messages to standard error (Unix traditional)
, -verbose
Output more detailed information about how it is making its decision
, -quiet
Only output error messages

RETURN VALUES

The program exit value is:

10
if it detects Transport Stream,
11
if it detects Program Stream,
12
if it detects Elementary Stream containing H.262 (MPEG-2),
14
if it detects Elementary Stream containing H.264 (MPEG-4/AVC),
5
if it looks like it might be PES,
9
if it really cannot decide, or
0
if some error occurred

SEE ALSO

esdots(1),

October 28, 2015 Debian