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• Cannot install Libtool library used but `LIBTOOL' is undefined trying to install ffmpeg

  23 décembre 2014, par user1503606

  I am trying to install ffmpeg on centos following this tutorial.

  http://ffmpeg.org/trac/ffmpeg/wiki/CentosCompilationGuide

  but when i run.

  cd ~/ffmpeg_sources
  
  git clone --depth 1 git://github.com/mstorsjo/fdk-aac.git
  
  cd fdk-aac
  
  autoreconf -fiv
  
  ./configure --prefix="$HOME/ffmpeg_build" --disable-shared
  
  make
  
  make install
  
  make distclean

  I get the following error.

  cd . && /bin/sh /root/ffmpeg_sources/fdk-aac/missing --run automake-1.9 --foreign
  
  Makefile.am: C objects in subdir but `AM_PROG_CC_C_O' not in `configure.ac'
  
  make: *** [Makefile.in] Error 1
  
  [root@worldnewstranslate fdk-aac]# make install
  
   cd . && /bin/sh /root/ffmpeg_sources/fdk-aac/missing --run automake-1.9 --foreign
  
  Makefile.am: C objects in subdir but `AM_PROG_CC_C_O' not in `configure.ac'
  
  make: *** [Makefile.in] Error 1

  I cannot get it to work for the life of me any help please why i maybe getting these errors.

  Thanks

• streaming from generated images using ffmpeg / vlc / live555

  10 octobre 2019, par Pavel

  For the life of me I cannot get this to work correctly.

  The idea is : simple python script that loads an image from a url (different every time) and passes it to ffmpeg, eg :

  python fetch.py | ffmpeg -f image2pipe -framerate 1 -i pipe:.jpg -c:a copy -c:v libx264 -r 5 -b 500000 -s 600x480 ../live555/out.264

  What I really need is to make this work with some sort of rtsp server.
  So far a sort of working approach was to use live555MediaServer that is running on the same server and pretty much streams that out.264 file.

  Why I don’t like this approach :

  a. connecting to rtsp stream using vlc works but it’s very unstable (video stops) and there are not errors or anything, if I click play it resumes.
  debug :
  live555 debug: RTSP track Close, 0 track remaining
  It seems like it just streams whatever the file has at that moment of time and does not do it continuously.

  b. I don’t like the "file" approach. Eg. ffmpeg is creating an out.264 file which grows. Ideally it would simply send the stream to the RTSP server via some protocol.

  c. live555MediaServer just sucks

  It looks like there is a way to run vlc server on my server as well, but I cannot figure out how to make ffmpeg feed the vlc server ?

  Any suggestions ?

• ffmpeg : Using with macos and swift

  22 février 2018, par jamesTMC

  I am trying to extract a thumbnail from the middle of a video. However, I am not sure if the issue lies within Swift or ffmpeg.

  The following code compiles but produces nothing.

      let frameCount = GetVideoFrameCount(itemPath: itemPath)
  
      let framesIn = frameCount / 2
  
      let framesInStr = "\(framesIn)"
  
  
  
      let thumbnailTask: Process = Process()
  
  
  
      thumbnailTask.launchPath = self.ffmpegLaunchPath
  
      thumbnailTask.arguments = ["-ss", framesInStr, "-i", itemPath.absoluteString.removingPercentEncoding!, "-vf", "scale=-1:120", "-frames:v", "1", thumbnailPath]
  
      thumbnailTask.standardInput = FileHandle.nullDevice
  
  
  
      thumbnailTask.launch()
  
      thumbnailTask.waitUntilExit()
  
  
  
      let thumbnailStatus = thumbnailTask.terminationStatus

  The "frameCount" variable does contain the number frames in the video. The Process "works" in that it doesn’t crash, the .terminationStatus = 0 but no thumbnail .jpg is produced.

  I have used the "-ss" option with String(framesIn), "\(framesIn)", I have changed the frameCount to an actual number (i.e., 10000), nothing. The "-ss" option ONLY works if I use String(10000) or any other number.

  Does anybody have a suggestion ?

  Thanks.