구차니의 잡동사니 모음

ffplay -max_delay 500000 -rtsp_transport udp -v trace "rtsp://user:pass@CamIP:Port/URL" 

-max_delay         <int>   ED... maximum muxing or demuxing delay in microseconds 

When receiving data over UDP, the demuxer tries to reorder received packets (since they may arrive out of order, or packets may get lost totally). This can be disabled by setting the maximum demuxing delay to zero (via the max_delay field of AVFormatContext). 

av_dict_set(&options, "buffer_size", "655360", 0); 

int av_dict_set (AVDictionary ** pm, const char * key, const char * value, int flags ) 

int AVCodecContext::rc_buffer_size

decoder bitstream buffer size

encoding: Set by user.

decoding: unused

Definition at line 2291 of file avcodec.h. 

Also setting -probesize and -analyzeduration to low values may help your stream start up more quickly (it uses these to scan for "streams" in certain muxers, like ts, where some can appears "later", and also to estimate the duration, which, for live streams, the latter you don't need anyway). This should be unneeded by dshow input. 

GET /bin/login?User=Peter+Lee&pw=123456&action=login HTTP/1.1

Host: 127.0.0.1:8000 

POST /bin/login HTTP/1.1

Host: 127.0.0.1:8000

Accept: image/gif, image/jpeg, */*

Referer: http://127.0.0.1:8000/login.html

Accept-Language: en-us

Content-Type: application/x-www-form-urlencoded

Accept-Encoding: gzip, deflate

User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)

Content-Length: 37

Connection: Keep-Alive

Cache-Control: no-cache

User=Peter+Lee&pw=123456&action=login 

/test/demo_form.asp?name1=value1&name2=value2

POST /test/demo_form.asp HTTP/1.1

Host: w3schools.com

name1=value1&name2=value2 

lrwxrwxrwx 1 root root 24  2월  5 12:43 /usr/bin/mpirun -> /etc/alternatives/mpirun*

lrwxrwxrwx 1 root root 25  2월  5 12:43 /usr/bin/mpiexec -> /etc/alternatives/mpiexec*

lrwxrwxrwx 1 root root 21  2월  5 12:43 /etc/alternatives/mpirun -> /usr/bin/mpirun.mpich*

lrwxrwxrwx 1 root root 22  2월  5 12:43 /etc/alternatives/mpiexec -> /usr/bin/mpiexec.mpich* 

lrwxrwxrwx 1 root root 13  2월  7  2016 /usr/bin/mpirun.mpich -> mpiexec.hydra*

lrwxrwxrwx 1 root root 13  2월  7  2016 /usr/bin/mpiexec.mpich -> mpiexec.hydra*

$ mpiexec --help

Usage: ./mpiexec [global opts] [local opts for exec1] [exec1] [exec1 args] : [local opts for exec2] [exec2] [exec2 args] : ...

Global options (passed to all executables):

  Global environment options:

    -genv {name} {value}             environment variable name and value

    -genvlist {env1,env2,...}        environment variable list to pass

    -genvnone                        do not pass any environment variables

    -genvall                         pass all environment variables not managed

                                          by the launcher (default)

  Other global options:

    -f {name}                        file containing the host names 

ub3:4  # this will spawn 4 processes on ub3

ub2:2  # this will spawn 2 processes on ub2

ub1    # this will spawn 1 process on ub1

ub0    # this will spawn 1 process on ub0 

$ mpiexec -info

HYDRA build details:

    Version:                                 3.2

    Release Date:                            Wed Nov 11 22:06:48 CST 2015

    CC:                              gcc   -Wl,-Bsymbolic-functions -Wl,-z,relro 

    CXX:                             g++   -Wl,-Bsymbolic-functions -Wl,-z,relro 

    F77:                             gfortran  -Wl,-Bsymbolic-functions -Wl,-z,relro 

    F90:                             gfortran  -Wl,-Bsymbolic-functions -Wl,-z,relro 

    Configure options:                       '--disable-option-checking' '--prefix=/usr' '--build=arm-linux-gnueabihf' '--includedir=${prefix}/include' '--mandir=${prefix}/share/man' '--infodir=${prefix}/share/info' '--sysconfdir=/etc' '--localstatedir=/var' '--disable-silent-rules' '--libdir=${prefix}/lib/arm-linux-gnueabihf' '--libexecdir=${prefix}/lib/arm-linux-gnueabihf' '--disable-maintainer-mode' '--disable-dependency-tracking' '--enable-shared' '--enable-fortran=all' '--disable-rpath' '--disable-wrapper-rpath' '--sysconfdir=/etc/mpich' '--libdir=/usr/lib/arm-linux-gnueabihf' '--includedir=/usr/include/mpich' '--docdir=/usr/share/doc/mpich' '--with-hwloc-prefix=system' 'CPPFLAGS= -Wdate-time -D_FORTIFY_SOURCE=2 -I/build/mpich-52KREu/mpich-3.2/src/mpl/include -I/build/mpich-52KREu/mpich-3.2/src/mpl/include -I/build/mpich-52KREu/mpich-3.2/src/openpa/src -I/build/mpich-52KREu/mpich-3.2/src/openpa/src -D_REENTRANT -I/build/mpich-52KREu/mpich-3.2/src/mpi/romio/include' 'CFLAGS= -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -O2' 'CXXFLAGS= -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -O2' 'FFLAGS= -g -O2 -fstack-protector-strong -O2' 'FCFLAGS= -g -O2 -fstack-protector-strong -O2' 'build_alias=arm-linux-gnueabihf' 'MPICHLIB_CFLAGS=-g -O2 -fstack-protector-strong -Wformat -Werror=format-security' 'MPICHLIB_CPPFLAGS=-Wdate-time -D_FORTIFY_SOURCE=2' 'MPICHLIB_CXXFLAGS=-g -O2 -fstack-protector-strong -Wformat -Werror=format-security' 'MPICHLIB_FFLAGS=-g -O2 -fstack-protector-strong' 'MPICHLIB_FCFLAGS=-g -O2 -fstack-protector-strong' 'LDFLAGS=-Wl,-Bsymbolic-functions -Wl,-z,relro' 'FC=gfortran' 'F77=gfortran' 'MPILIBNAME=mpich' '--cache-file=/dev/null' '--srcdir=.' 'CC=gcc' 'LIBS=-lpthread '

    Process Manager:                         pmi

    Launchers available:                     ssh rsh fork slurm ll lsf sge manual persist

    Topology libraries available:            hwloc

    Resource management kernels available:   user slurm ll lsf sge pbs cobalt

    Checkpointing libraries available:       blcr

    Demux engines available:                 poll select 

$ sudo apt-cache search openmpi

gromacs-openmpi - Molecular dynamics sim, binaries for OpenMPI parallelization

libblacs-openmpi1 - Basic Linear Algebra Comm. Subprograms - Shared libs. for OpenMPI

libhdf5-openmpi-8 - Hierarchical Data Format 5 (HDF5) - runtime files - OpenMPI version

libhdf5-openmpi-8-dbg - Hierarchical Data Format 5 (HDF5) - OpenMPI Debug package

libhdf5-openmpi-dev - Hierarchical Data Format 5 (HDF5) - development files - OpenMPI version

libmeep-lam4-7 - library for using parallel (OpenMPI) version of meep

libmeep-lam4-dev - development library for using parallel (OpenMPI) version of meep

libmeep-mpi-default-dev - development library for using parallel (OpenMPI) version of meep

libmeep-mpi-default7 - library for using parallel (OpenMPI) version of meep

libmeep-mpich2-7 - library for using parallel (OpenMPI) version of meep

libmeep-mpich2-dev - development library for using parallel (OpenMPI) version of meep

libmeep-openmpi-dev - development library for using parallel (OpenMPI) version of meep

libmeep-openmpi7 - library for using parallel (OpenMPI) version of meep

libopenmpi-dev - high performance message passing library -- header files

libopenmpi1.6 - high performance message passing library -- shared library

libopenmpi1.6-dbg - high performance message passing library -- debug library

libscalapack-openmpi1 - Scalable Linear Algebra Package - Shared libs. for OpenMPI

meep-lam4 - software package for FDTD simulation, parallel (OpenMPI) version

meep-mpi-default - software package for FDTD simulation, parallel (OpenMPI) version

meep-mpich2 - software package for FDTD simulation, parallel (OpenMPI) version

meep-openmpi - software package for FDTD simulation, parallel (OpenMPI) version

mpqc-openmpi - Massively Parallel Quantum Chemistry Program (OpenMPI transitional package)

netpipe-openmpi - Network performance tool using OpenMPI

octave-openmpi-ext - Transitional package for parallel computing in Octave using MPI

openmpi-bin - high performance message passing library -- binaries

openmpi-checkpoint - high performance message passing library -- checkpoint support

openmpi-common - high performance message passing library -- common files

openmpi-doc - high performance message passing library -- man pages

openmpi1.6-common - high performance message passing library -- common files

openmpi1.6-doc - high performance message passing library -- man pages

openmpipython - MPI-enhanced Python interpreter (OpenMPI based version)

yorick-full - full installation of the Yorick interpreter and add-ons

yorick-mpy-openmpi - Message Passing Yorick (OpenMPI build) 

$ sudo apt-cache search mpich

gromacs-mpich - Molecular dynamics sim, binaries for MPICH parallelization

libhdf5-mpich-8 - Hierarchical Data Format 5 (HDF5) - runtime files - MPICH2 version

libhdf5-mpich-8-dbg - Hierarchical Data Format 5 (HDF5) - Mpich Debug package

libhdf5-mpich-dev - Hierarchical Data Format 5 (HDF5) - development files - MPICH version

libhdf5-mpich2-dev - Hierarchical Data Format 5 (HDF5) - development files - MPICH version

libmeep-mpi-default-dev - development library for using parallel (OpenMPI) version of meep

libmeep-mpi-default7 - library for using parallel (OpenMPI) version of meep

libmeep-mpich2-7 - library for using parallel (OpenMPI) version of meep

libmeep-mpich2-dev - development library for using parallel (OpenMPI) version of meep

libmpich-dev - Development files for MPICH

libmpich12 - Shared libraries for MPICH

libmpich2-3 - Shared libraries for MPICH2

libmpich2-dev - Transitional dummy package for MPICH development files

libmpl-dev - Development files for mpl part of MPICH

libmpl1 - Shared libraries for mpl part of MPICH

libopa-dev - Development files for opa part of MPICH

libopa1 - Shared libraries for opa part of MPICH

libscalapack-mpi-dev - Scalable Linear Algebra Package - Dev. files for MPICH

meep-mpi-default - software package for FDTD simulation, parallel (OpenMPI) version

meep-mpich2 - software package for FDTD simulation, parallel (OpenMPI) version

mpb-mpi - MIT Photonic-Bands, parallel (mpich) version

mpi-default-bin - Standard MPI runtime programs (metapackage)

mpi-default-dev - Standard MPI development files (metapackage)

mpich - Implementation of the MPI Message Passing Interface standard

mpich-doc - Documentation for MPICH

mpich2 - Transitional dummy package

mpich2-doc - Transitional dummy package for MPICH documentation

mpich2python - MPI-enhanced Python interpreter (MPICH2 based version)

netpipe-mpich2 - Network performance tool using MPICH2 MPI

scalapack-mpi-test - Scalable Linear Algebra Package - Test files for MPICH

scalapack-test-common - Test data for ScaLAPACK testers

yorick-full - full installation of the Yorick interpreter and add-ons

yorick-mpy-mpich2 - Message Passing Yorick (MPICH2 build)

$ sudo apt-cache search mpirun

lam-runtime - LAM runtime environment for executing parallel programs

mpi-default-bin - Standard MPI runtime programs (metapackage) 

$ sudo apt-get install libcr-dev mpich2 mpich2-doc 

$ sudo apt-get install mpich

Reading package lists... Done

Building dependency tree

Reading state information... Done

The following extra packages will be installed:

  gfortran gfortran-4.9 hwloc-nox libcr0 libgfortran-4.9-dev libhwloc-plugins

  libhwloc5 libmpich-dev libmpich12 libmpl-dev libmpl1 libopa-dev libopa1

  ocl-icd-libopencl1

Suggested packages:

  gfortran-doc gfortran-4.9-doc libgfortran3-dbg blcr-dkms

  libhwloc-contrib-plugins blcr-util mpich-doc opencl-icd

The following NEW packages will be installed:

  gfortran gfortran-4.9 hwloc-nox libcr0 libgfortran-4.9-dev libhwloc-plugins

  libhwloc5 libmpich-dev libmpich12 libmpl-dev libmpl1 libopa-dev libopa1

  mpich ocl-icd-libopencl1

0 upgraded, 15 newly installed, 0 to remove and 3 not upgraded.

Need to get 6,879 kB of archives.

After this operation, 25.5 MB of additional disk space will be used.

Do you want to continue? [Y/n] 

$ sudo apt-get install mpich2

Reading package lists... Done

Building dependency tree

Reading state information... Done

The following extra packages will be installed:

  gfortran gfortran-4.9 hwloc-nox libcr0 libgfortran-4.9-dev libhwloc-plugins

  libhwloc5 libmpich-dev libmpich12 libmpl-dev libmpl1 libopa-dev libopa1

  mpich ocl-icd-libopencl1

Suggested packages:

  gfortran-doc gfortran-4.9-doc libgfortran3-dbg blcr-dkms

  libhwloc-contrib-plugins blcr-util mpich-doc opencl-icd

The following NEW packages will be installed:

  gfortran gfortran-4.9 hwloc-nox libcr0 libgfortran-4.9-dev libhwloc-plugins

  libhwloc5 libmpich-dev libmpich12 libmpl-dev libmpl1 libopa-dev libopa1

  mpich mpich2 ocl-icd-libopencl1

0 upgraded, 16 newly installed, 0 to remove and 3 not upgraded.

Need to get 6,905 kB of archives.

After this operation, 25.6 MB of additional disk space will be used.

Do you want to continue? [Y/n]

$ mpirun

[mpiexec@raspberrypi] set_default_values (ui/mpich/utils.c:1528): no executable provided

[mpiexec@raspberrypi] HYD_uii_mpx_get_parameters (ui/mpich/utils.c:1739): setting default values failed

[mpiexec@raspberrypi] main (ui/mpich/mpiexec.c:153): error parsing parameters 

$ mpicc mpi.c -o hello

$ mpirun -np 2 ./hello

Hello world from process 0 of 2

Hello world from process 1 of 2 

$ mpirun --help

Usage: ./mpiexec [global opts] [local opts for exec1] [exec1] [exec1 args] : [local opts for exec2] [exec2] [exec2 args] : ...

Global options (passed to all executables):

  Global environment options:

    -genv {name} {value}             environment variable name and value

    -genvlist {env1,env2,...}        environment variable list to pass

    -genvnone                        do not pass any environment variables

    -genvall                         pass all environment variables not managed

                                          by the launcher (default)

  Other global options:

    -f {name}                        file containing the host names

    -hosts {host list}               comma separated host list

    -wdir {dirname}                  working directory to use

    -configfile {name}               config file containing MPMD launch options

Local options (passed to individual executables):

  Local environment options:

    -env {name} {value}              environment variable name and value

    -envlist {env1,env2,...}         environment variable list to pass

    -envnone                         do not pass any environment variables

    -envall                          pass all environment variables (default)

  Other local options:

    -n/-np {value}                   number of processes

    {exec_name} {args}               executable name and arguments

Hydra specific options (treated as global):

  Launch options:

    -launcher                        launcher to use (ssh rsh fork slurm ll lsf sge manual persist)

    -launcher-exec                   executable to use to launch processes

    -enable-x/-disable-x             enable or disable X forwarding

  Resource management kernel options:

    -rmk                             resource management kernel to use (user slurm ll lsf sge pbs cobalt)

  Processor topology options:

    -topolib                         processor topology library (hwloc)

    -bind-to                         process binding

    -map-by                          process mapping

    -membind                         memory binding policy

  Checkpoint/Restart options:

    -ckpoint-interval                checkpoint interval

    -ckpoint-prefix                  checkpoint file prefix

    -ckpoint-num                     checkpoint number to restart

    -ckpointlib                      checkpointing library (blcr)

  Demux engine options:

    -demux                           demux engine (poll select)

  Other Hydra options:

    -verbose                         verbose mode

    -info                            build information

    -print-all-exitcodes             print exit codes of all processes

    -iface                           network interface to use

    -ppn                             processes per node

    -profile                         turn on internal profiling

    -prepend-rank                    prepend rank to output

    -prepend-pattern                 prepend pattern to output

    -outfile-pattern                 direct stdout to file

    -errfile-pattern                 direct stderr to file

    -nameserver                      name server information (host:port format)

    -disable-auto-cleanup            don't cleanup processes on error

    -disable-hostname-propagation    let MPICH auto-detect the hostname

    -order-nodes                     order nodes as ascending/descending cores

    -localhost                       local hostname for the launching node

    -usize                           universe size (SYSTEM, INFINITE, <value>)

Please see the intructions provided at

http://wiki.mpich.org/mpich/index.php/Using_the_Hydra_Process_Manager

for further details