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• How can i parse strings as the inputs to subprocess.Popen ?

  26 juillet 2013, par rash

  Here I tried to cut first and second 30sec long video file from "path/connect.flv" to the files output1.flv and output2.flv. It works. I able to concatenate these two files to form a new file "final.flv" of 60sec long. So this works and i am getting the outputs output1.flv [30sec], output2.flv[30sec] and final.flv[1min].

  Here is the python code :

  import subprocess
  
  
  
  ffmpeg_command1 = ["ffmpeg", "-i", "/home/xincoz/test/connect.flv", "-acodec", "copy", "-ss", "00:00:00", "-t", "00:00:30", "/home/xincoz/test/output1.flv"]
  
  
  
  ffmpeg_command2 = ["ffmpeg", "-i", "/home/xincoz/test/connect.flv", "-acodec", "copy", "-ss", "00:00:30", "-t", "00:00:30", "/home/xincoz/test/output2.flv"]
  
  
  
  ffmpeg_command3 = ["mencoder", "-forceidx", "-ovc", "copy", "-oac", "pcm", "-o", "/home/xincoz/test/final.flv", "/home/xincoz/test/output1.flv", "/home/xincoz/test/output2.flv"]
  
  
  
  subprocess.call(ffmpeg_command1)
  
  
  
  subprocess.call(ffmpeg_command2)
  
  
  
  subprocess.Popen(ffmpeg_command3)

  But what i really want is to concatenate two strings out1 and out2 and concatinate these two to a file instead of concatenating "/home/xincoz/test/output1.flv" and "/home/xincoz/test/output2.flv". So how can i parse string out1 and out2 as the inputs to mencoder ? Please edit my code to achieve the result.

  import subprocess,os
  
  
  
  ffmpeg_command = ["ffmpeg", "-i", "/home/xincoz/test/connect.flv", "-acodec", "copy", "-ss", "00:00:00", "-t", "00:00:30","-f", "flv", "pipe:1"]
  
  
  
  p = subprocess.Popen(ffmpeg_command,stdout=subprocess.PIPE)
  
  
  
  out1, err = p.communicate()
  
  
  
  ffmpeg_command1 = ["ffmpeg", "-i", "/home/xincoz/test/connect.flv", "-acodec", "copy", "-ss", "00:00:30", "-t", "00:00:30","-f", "flv", "pipe:1"]
  
  
  
  p1 = subprocess.Popen(ffmpeg_command1,stdout=subprocess.PIPE)
  
  
  
  out2, err1 = p1.communicate()
  
  
  
  ffmpeg_command2 = ["mencoder", "-forceidx", "-ovc", "copy", "-oac", "pcm", "-o", "/home/xincoz/test/final.flv", out1, out2 ]
  
  
  
  p2=subprocess.Popen(ffmpeg_command2)

  Please help me. Thanks a lot in advance.

• Compile ffmpeg and x264 with —enable-shared

  20 août 2016, par John Allard

  I am trying to compile ffmpeg with shared-library support, because when I compiled it statically it ended up making huge libraries, like libavcodec.a with 75MB in size. Any programs that I compiled against libavcodec was at least 50MB in size. This only happens on my RaspberryPi though, if I do

  ls -lsth $(which ffmpeg)

  on my RPI3 I get

  15M -rwxr-xr-x 1 pi pi 15M Jul 29 21:49 /home/pi/camiocam/cam/binaries/bin//ffmpeg

  While if I do the same on my macbook I get this output

  488 -r-xr-xr-x  1 john  admin   242K Jul 26 19:34 /usr/local/Cellar/ffmpeg/3.1.1/bin/ffmpeg

  To get shared library support I did the following

  # download and install libx264
  
  cd ~/ffmpeg_build
  
  git clone git://git.videolan.org/x264.git
  
  cd x264
  
  PATH="$HOME/bin:$PATH" ./configure --host=arm-unknown-linux-gnueabi  --prefix="$HOME/ffmpeg_build" --bindir="$HOME/bin" --enable-shared --disable-opencl
  
  # PATH="$HOME/bin:$PATH" make -j 8
  
  # PATH="$HOME/bin:$PATH" make install
  
  # ldconfig

  and ...

  # to install ffmpeg
  
  
  
  cd ~/ffmpeg_sources
  
  wget http://ffmpeg.org/releases/ffmpeg-snapshot.tar.bz2
  
  tar xjvf ffmpeg-snapshot.tar.bz2
  
  cd ffmpeg
  
  PATH="$HOME/bin:$PATH" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./configure --prefix="$HOME/ffmpeg_build" --arch=armel --target-os=linux --extra-cflags="-I$HOME/ffmpeg_build/include" --enable-pic  --extra-ldflags="-L$HOME/ffmpeg_build/lib" --bindir="$HOME/bin" --enable-gpl --enable-libx264 --enable-nonfree --enable-shared
  
  PATH="$HOME/bin:$PATH" make -j 8

  Which gives this output

  License: nonfree and unredistributable
  
  Creating config.mak, config.h, and doc/config.texi...
  
  config.h is unchanged
  
  libavutil/avconfig.h is unchanged
  
  libavcodec/bsf_list.c is unchanged
  
  libavformat/protocol_list.c is unchanged
  
  CC      libavcodec/libx264.o
  
  POD     doc/ffprobe.pod
  
  POD     doc/ffmpeg-all.pod
  
  POD     doc/ffserver-all.pod
  
  POD     doc/ffmpeg.pod
  
  POD     doc/ffprobe-all.pod
  
  POD     doc/ffserver.pod
  
  MAN     doc/ffprobe.1
  
  MAN     doc/ffmpeg.1
  
  MAN     doc/ffserver.1
  
  MAN     doc/ffmpeg-all.1
  
  MAN     doc/ffprobe-all.1
  
  MAN     doc/ffserver-all.1
  
  GEN     libavcodec/libavcodec.ver
  
  LD      libavcodec/libavcodec.so.57
  
  AR      libavcodec/libavcodec.a
  
  LD      libavformat/libavformat.so.57
  
  LD      libavfilter/libavfilter.so.6
  
  LD      libavdevice/libavdevice.so.57
  
  library.mak:102: recipe for target 'libavdevice/libavdevice.so.57' failed
  
  make: *** [libavdevice/libavdevice.so.57] Killed
  
  make: *** Deleting file 'libavdevice/libavdevice.so.57'

  I’ve tried to add the --enable-pic flag to the ffmpeg configure command but that made no difference.

• How can we use ffmpeg or fluent-ffmpeg with angular cli ?

  25 juillet 2019, par Nileshdeora1122

  How to use ffmpeg with angular2+ application ?

  im tring to use ffmpeg inside my angular application but it is throwing some error during importing ffmpeg in angular like this :

  // import * as ffmpeg from 'fluent-ffmpeg';

  but getting errors like this :

  ERROR in ./node_modules/fluent-ffmpeg/lib/ffprobe.js
  
  Module not found: Error: Can't resolve 'child_process' in '/home/pfacode1/angularApplication/careerfable2/node_modules/fluent-ffmpeg/lib'
  
  ERROR in ./node_modules/fluent-ffmpeg/lib/utils.js
  
  Module not found: Error: Can't resolve 'child_process' in '/home/pfacode1/angularApplication/careerfable2/node_modules/fluent-ffmpeg/lib'
  
  ERROR in ./node_modules/fluent-ffmpeg/lib/processor.js
  
  Module not found: Error: Can't resolve 'child_process' in '/home/pfacode1/angularApplication/careerfable2/node_modules/fluent-ffmpeg/lib'
  
  ERROR in ./node_modules/fluent-ffmpeg/lib/processor.js
  
  Module not found: Error: Can't resolve 'fs' in '/home/pfacode1/angularApplication/careerfable2/node_modules/fluent-ffmpeg/lib'
  
  ERROR in ./node_modules/fluent-ffmpeg/lib/capabilities.js
  
  Module not found: Error: Can't resolve 'fs' in '/home/pfacode1/angularApplication/careerfable2/node_modules/fluent-ffmpeg/lib'
  
  ERROR in ./node_modules/fluent-ffmpeg/lib/recipes.js
  
  Module not found: Error: Can't resolve 'fs' in '/home/pfacode1/angularApplication/careerfable2/node_modules/fluent-ffmpeg/lib'
  
  ERROR in ./node_modules/isexe/mode.js
  
  Module not found: Error: Can't resolve 'fs' in '/home/pfacode1/angularApplication/careerfable2/node_modules/isexe'
  
  ERROR in ./node_modules/isexe/windows.js
  
  Module not found: Error: Can't resolve 'fs' in '/home/pfacode1/angularApplication/careerfable2/node_modules/isexe'
  
  ERROR in ./node_modules/isexe/index.js
  
  Module not found: Error: Can't resolve 'fs' in '/home/pfacode1/angularApplication/careerfable2/node_modules/isexe'
  
  ERROR in ./node_modules/fluent-ffmpeg/lib/utils.js
  
  Module not found: Error: Can't resolve 'os' in '/home/pfacode1/angularApplication/careerfable2/node_modules/fluent-ffmpeg/lib'
  
  ERROR in ./node_modules/fluent-ffmpeg/lib/recipes.js
  
  Module not found: Error: Can't resolve 'path' in '/home/pfacode1/angularApplication/careerfable2/node_modules/fluent-ffmpeg/lib'
  
  ERROR in ./node_modules/fluent-ffmpeg/lib/processor.js
  
  Module not found: Error: Can't resolve 'path' in '/home/pfacode1/angularApplication/careerfable2/node_modules/fluent-ffmpeg/lib'
  
  ERROR in ./node_modules/fluent-ffmpeg/lib/capabilities.js
  
  Module not found: Error: Can't resolve 'path' in '/home/pfacode1/angularApplication/careerfable2/node_modules/fluent-ffmpeg/lib'
  
  ERROR in ./node_modules/fluent-ffmpeg/lib/fluent-ffmpeg.js
  
  Module not found: Error: Can't resolve 'path' in '/home/pfacode1/angularApplication/careerfable2/node_modules/fluent-ffmpeg/lib'
  
  ERROR in ./node_modules/fluent-ffmpeg/lib/options/misc.js
  
  Module not found: Error: Can't resolve 'path' in '/home/pfacode1/angularApplication/careerfable2/node_modules/fluent-ffmpeg/lib/options'
  
  ERROR in ./node_modules/which/which.js
  
  Module not found: Error: Can't resolve 'path' in '/home/pfacode1/angularApplication/careerfable2/node_modules/which'
  
  ERROR in ./node_modules/fluent-ffmpeg/lib/recipes.js
  
  Module not found: Error: Can't resolve 'stream' in '/home/pfacode1/angularApplication/careerfable2/node_modules/fluent-ffmpeg/lib'