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• how to save h264 stream into .264 file

  6 mars 2015, par user3547405

  I’m using nginx-rtmp-module build hls server, when I play it on safari, it does not shows image,then i use this command ffmpeg -i rtmp://192.168.4.213/hls/testH264 -c copy -map 0 -f segment -segment_list playlist.m3u8 -segment_time 5 output%03d.ts, it shows missing picture in access unit with size 28184,so i think maybe the raw h264 stream has some problem,then i directly save the h264 stream into .264 file,but when i play the .264 file with vlc,the screen is fuzzy,help

• Libav linking error : undefined references

  22 février 2017, par Fedech

  Here’s my problem :

  • I built ffmpeg from source (version 1.2), the libav* libraries are in /usr/local/lib and they’re static
  • I’m compiling a ns3 (www.nsnam.org) module, so my only control over the linker is through the env variable LINKFLAGS
  • In the source the headers are in a "extern C" block, so it’s not the usual g++ name mangling
  • I set LINKFLAGS="-I/usr/local/include/libavformat -I/usr/local/include/libavcodec -I/usr/local/include/libavutil -L/usr/local/lib -lavformat -lavcodec -lavutil", and the linker can’t seem to find any of the libav* functions I call (I get a lot of "undefined reference" and then "collect2 : error : ld returned status 1"

  Can anyone help me ? Thanks...

  edit : here are a few of the undefined reference messages :

      ./libns3.14.1-qoe-monitor-debug.so: undefined reference to `av_guess_format'
  
      ./libns3.14.1-qoe-monitor-debug.so: undefined reference to `av_read_frame'
  
      ./libns3.14.1-qoe-monitor-debug.so: undefined reference to `avformat_write_header'
  
      ./libns3.14.1-qoe-monitor-debug.so: undefined reference to `av_interleaved_write_frame'
  
      ./libns3.14.1-qoe-monitor-debug.so: undefined reference to `av_find_stream_info'
  
      ./libns3.14.1-qoe-monitor-debug.so: undefined reference to `av_register_all'
  
      ./libns3.14.1-qoe-monitor-debug.so: undefined reference to `av_init_packet'
  
      ./libns3.14.1-qoe-monitor-debug.so: undefined reference to `avformat_alloc_context'
  
      ./libns3.14.1-qoe-monitor-debug.so: undefined reference to `av_dump_format'
  
      ./libns3.14.1-qoe-monitor-debug.so: undefined reference to `avio_close'

  edit2 : here is the message I get after "build failed" :

  -> task in 'scratch-simulator' failed (exit status 1): 
  
  {task 53952272: cxxprogram scratch-simulator.cc.1.o -> scratch-simulator}
  
  ['/usr/bin/g++', '-I/usr/local/include/libavcodec', '-I/usr/local/include/libavformat/',
  
   '-I/usr/local/include/libavutil/', '-L/usr/local/lib', '-I/usr/local
  
  /include/libavcodec', '-I/usr/local/include/libavformat/', '-I/usr/local/include
  
  /libavutil/', '-L/usr/local/lib', '-pthread', '-pthread', '-Wl,-z,relro', 
  
  'scratch/scratch-simulator.cc.1.o', '-o', '/home/fede/Thesis/ns-allinone-3.14.1
  
  /ns-3.14.1/build/scratch/scratch-simulator', '-Wl,-Bstatic', '-Wl,-Bdynamic', 
  
  '-Wl,--no-as-needed', '-L.', '-L.', '-L.', '-L.', '-L.', '-L.', '-L.', '-L.', '-L.',
  
   '-L.', '-L.', '-L.', '-L.', '-L.', '-L.', '-L.', '-L.', '-L.', '-L.', '-L.', '-L.',
  
   '-L.', '-L.', '-L.', '-L.', '-L.', '-L.', '-L.', '-L.', '-L.', '-L.', '-L.', '-L.', 
  
  '-L.', '-L.', '-L.', '-L.', '-L.', '-L/usr/lib', '-lns3.14.1-test-debug', '-lns3.14.1-
  
  csma-layout-debug', '-lns3.14.1-point-to-point-layout-debug', '-lns3.14.1-netanim-
  
  debug', '-lns3.14.1-lte-debug', '-lns3.14.1-spectrum-debug', '-lns3.14.1-antenna-
  
  debug', '-lns3.14.1-aodv-debug', '-lns3.14.1-dsdv-debug', '-lns3.14.1-dsr-debug', 
  
  '-lns3.14.1-mesh-debug', '-lns3.14.1-olsr-debug', '-lns3.14.1-csma-debug', '-lns3.14.1-
  
  wimax-debug', '-lns3.14.1-applications-debug', '-lns3.14.1-virtual-net-device-debug', 
  
  '-lns3.14.1-uan-debug', '-lns3.14.1-energy-debug', '-lns3.14.1-flow-monitor-debug', 
  
  '-lns3.14.1-nix-vector-routing-debug', '-lns3.14.1-tap-bridge-debug', '-lns3.14.1-
  
  visualizer-debug', '-lns3.14.1-internet-debug', '-lns3.14.1-bridge-debug', '-lns3.14.1-
  
  point-to-point-debug', '-lns3.14.1-mpi-debug', '-lns3.14.1-wifi-debug', '-lns3.14.1-
  
  buildings-debug', '-lns3.14.1-propagation-debug', '-lns3.14.1-mobility-debug', 
  
  '-lns3.14.1-config-store-debug', '-lns3.14.1-tools-debug', '-lns3.14.1-stats-debug',
  
   '-lns3.14.1-emu-debug', '-lns3.14.1-topology-read-debug', '-lns3.14.1-network-debug', 
  
  '-lns3.14.1-qoe-monitor-debug', '-lns3.14.1-core-debug', '-lrt', '-lgsl', 
  
  '-lgslcblas', '-lm', '-ldl', '-lgtk-x11-2.0', '-lgdk-x11-2.0', '-latk-1.0', 
  
  '-lgio-2.0', '-lpangoft2-1.0', '-lpangocairo-1.0', '-lgdk_pixbuf-2.0', '-lcairo', 
  
  '-lpango-1.0', '-lfreetype', '-lfontconfig', '-lgobject-2.0', '-lglib-2.0', '-lxml2', 
  
  '-lpython2.7']

• Révision 21321 : Report de r21320.

  21 avril 2014, par Eric Lupinacci

  Eviter que la mise en exergue du module de langue dans le title et le texte coincide avec un mot du texte.