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• Send ffmpeg input from python variable

  27 septembre 2016, par Roney rogerio

  I need send continuouns date to ffmpeg from python, I have tried but really dont know the best solution to make this, i have tried :

  import subprocess as sp
  
  import time
  
  
  
  command = ["/usr/bin/ffmpeg",
  
             '-f', 'hls',
  
             '-c', 'copy',
  
             '-hls_time', '10',
  
             '-hls_flags', 'delete_segments',
  
             '-i', '-', # The imput comes from a pipe
  
             'index.m3u8' ]
  
  
  
  proc = sp.Popen(command, stdin=sp.PIPE)
  
  
  
  proc.stdin.write(open("video.ts", 'r').read())
  
  
  
  proc.stdin.close()
  
  proc.wait()

  I get the error :

  ffmpeg version N-80901-gfebc862 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
  
    configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libfreetype --enable-gnutls --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvidstab
  
    libavutil      55. 28.100 / 55. 28.100
  
    libavcodec     57. 48.101 / 57. 48.101
  
    libavformat    57. 41.100 / 57. 41.100
  
    libavdevice    57.  0.102 / 57.  0.102
  
    libavfilter     6. 47.100 /  6. 47.100
  
    libavresample   3.  0.  0 /  3.  0.  0
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  1.100 /  2.  1.100
  
    libpostproc    54.  0.100 / 54.  0.100
  
  pipe:: Invalid data found when processing input
  
  Traceback (most recent call last):
  
    File "teste.py", line 15, in <module>
  
      proc.stdin.write(open("video.ts", 'r').read())
  
  IOError: [Errno 32] Broken pipe
  
  </module>

• Configuring install path : prefix=[PREFIX] not fully understood

  29 septembre 2019, par whatshisface

  I think this is simply a general c++ question :

  I’m attempting to compile a local version of ffmpeg on Linux Fedora using the gnu c++ compiler. I have source code in a bunch of folders under :

  ~/<username>/Downloads/Code/ffmpeg_sources/
  
  </username>

  which is where I’m attempting to set the config flags to install the build to a target not under this tree but at a root level directory with local shared libraries :

  /usr/local/

  There is this following section near the beginning of the configuration file :

  Standard options:
  
  
  
   --prefix=PREFIX          install in PREFIX []
  
   --bindir=DIR             install binaries in DIR [PREFIX/bin]
  
   --datadir=DIR            install data files in DIR [PREFIX/share/ffmpeg]
  
   --docdir=DIR             install documentation in DIR [PREFIX/share/doc/ffmpeg]
  
   --libdir=DIR             install libs in DIR [PREFIX/lib]
  
   --shlibdir=DIR           install shared libs in DIR [PREFIX/lib]
  
   --incdir=DIR             install includes in DIR [PREFIX/include]
  
   --mandir=DIR             install man page in DIR [PREFIX/share/man]
  
   --enable-rpath           use rpath to allow installing libraries in paths
  
                            not part of the dynamic linker search path

  I may have completely misunderstood this, but I thought that setting a value like

  --prefix=/usr/local

  or

  --prefix=[/usr/local]

  might work, but it appears not to, as once the ./config, make&&make install is complete, it has done a bunch of stuff but there’s nothing installed at the target. There are a LOT of new executable files built in the source directory, so presumably the build is working but I’m simply specifying the paths incorrectly ? A part of the same problem is that it’s unclear whether, once I’ve set the

  --prefix=[PREFIX]

  correctly, I need to set all of the further

  --datadir, --libdir

  etc. or whether the first —prefix value is enough ?

  What is the above configuration syntax trying to show me ?

• Configuring install path : prefix=[PREFIX] not fully understood

  3 mai 2016, par whatshisface

  I think this is simply a general c++ question :

  I’m attempting to compile a local version of ffmpeg on Linux Fedora using the gnu c++ compiler. I have source code in a bunch of folders under :

  ~/<username>/Downloads/Code/ffmpeg_sources/
  
  </username>

  which is where I’m attempting to set the config flags to install the build to a target not under this tree but at a root level directory with local shared libraries :

  /usr/local/

  There is this following section near the beginning of the configuration file :

  Standard options:
  
  
  
   --prefix=PREFIX          install in PREFIX []
  
   --bindir=DIR             install binaries in DIR [PREFIX/bin]
  
   --datadir=DIR            install data files in DIR [PREFIX/share/ffmpeg]
  
   --docdir=DIR             install documentation in DIR [PREFIX/share/doc/ffmpeg]
  
   --libdir=DIR             install libs in DIR [PREFIX/lib]
  
   --shlibdir=DIR           install shared libs in DIR [PREFIX/lib]
  
   --incdir=DIR             install includes in DIR [PREFIX/include]
  
   --mandir=DIR             install man page in DIR [PREFIX/share/man]
  
   --enable-rpath           use rpath to allow installing libraries in paths
  
                            not part of the dynamic linker search path

  I may have completely misunderstood this, but I thought that setting a value like

  --prefix=/usr/local

  or

  --prefix=[/usr/local]

  might work, but it appears not to, as once the ./config, make&&make install is complete, it has done a bunch of stuff but there’s nothing installed at the target. There are a LOT of new executable files built in the source directory, so presumably the build is working but I’m simply specifying the paths incorrectly ? A part of the same problem is that it’s unclear whether, once I’ve set the

  --prefix=[PREFIX]

  correctly, I need to set all of the further

  --datadir, --libdir

  etc. or whether the first —prefix value is enough ?

  What is the above configuration syntax trying to show me ?