NAME

     esfilter — Output a filtered or truncated version of an elementary stream

SYNOPSIS

     esfilter -copy | -filter | -strip [-err stdout] [-err stderr] [-verbose | -v] [-quiet | -q]
              [-host dest_ip[:port]] [-max max_frames | -m max_frames] [-freq keep_frequency]
              [-allref] [-tsout] [-pes | -ts] [-h264 | -avc | -h262] in_file | -stdin out_file |
              -stdout

DESCRIPTION

     Output a filtered or truncated version of an elementary stream.  The input is either H.264
     (MPEG-4/AVC) or H.262 (MPEG-2).  The output is either an elementary stream, or an H.222
     transport stream

     If output is to an H.222 Transport Stream, then fixed values for the PMT PID (0x66) and
     video PID (0x68) are used.

   Files
     in_file
             is the input elementary stream (but see -stdin below).

     out_file
             is the output stream, either an equivalent elementary stream, or an H.222 Transport
             Stream (but see -stdout and -host below).

   Actions
     -copy   Copy the input data to the output file (mostly useful as a way of truncating data
             with -max)

     -filter
             Filter data from input to output, aiming to keep every keep_frequencyth frame (where
             keep_frequency is specified by -freq).

     -strip  For H.264, output just the IDR and I pictures, for H.262, output just the I
             pictures, but see -allref below.

   Switches
     -err stdout
             Write error messages to standard output (the default)

     -err stderr
             Write error messages to standard error (Unix traditional)

     -stdin  Input from standard input, instead of a file

     -v, -verbose
             Output extra information about packets

     -q, -quiet
             Only output error messages

     -host dest_ip[:port]
             Writes output (over TCP/IP) to the named host, instead of to a named file. If port
             is not specified, it defaults to 88. Implies -tsout.

     -max max_frames, -m max_frames
             Maximum number of frames to read (for -filter and -strip), or ES units/NAL units
             (for -copy).

     -freq keep_frequency
             Specify the frequency of frames to try to keep with -filter. Defaults to 8.

     -allref
             With -strip, keep all reference pictures (H.264) or all I and P pictures (H.262)

     -tsout  Output data as Transport Stream PES packets (the default is as Elementary Stream)

     -pes, -ts
             The input file is TS or PS, to be read via the PES->ES reading mechanisms. Not
             allowed with -stdin.

   Stream type:
     If input is from a file, then the program will look at the start of the file to determine if
     the stream is H.264 or H.262 data. This process may occasionally come to the wrong
     conclusion, in which case the user can override the choice using the following switches.

     If input is from standard input (via -stdin), then it is not possible for the program to
     make its own decision on the input stream type.  Instead, it defaults to H.262, and relies
     on the user indicating if this is wrong.

     -h264, -avc
             Force the program to treat the input as MPEG-4/AVC.

     -h262   Force the program to treat the input as MPEG-2.

SEE ALSO

     esdots(1),