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• retriving video details with ffprobe in php

  16 mai 2023, par Roohbakhsh Masoud

  i'm using this command for retrieve video information in ubuntu terminal :

  



  ffprobe -show_streams sample.mp4


  



  this command show all information about video in terminal, but when i use this command in php and use exec function to retrieve result , return

  



  string(0) ""
{}


  



  how i can retrieve result in php ?

  



  my code :

  



      public function information($ffmpeg,$file)
    {
      $info = exec("$ffmpeg -show_streams $file");
      return $info;
    }


  


• Why rtp streaming of a .avi video file fails to be received ?

  14 juillet 2016, par user1914692

  In ffmpeg streamingGuide, it writes :

  ffmpeg -re -f lavfi -i aevalsrc="sin(400*2*PI*t)" -ar 8000 -f mulaw -f rtp rtp://127.0.0.1:1234 &
  
  ffplay rtp://127.0.0.1:1234

  I want to use a real video file to replace the artificial signal.
  Then I write the below at terminal A :

  ffmpeg -re -i outputFile.avi -f mulaw -f rtp rtp://127.0.0.1:1234

  it seems it is working :
  The frame information is counting. Here are information on the terminal A at the end :

  frame=  309 fps= 29 q=31.0 Lsize=     931kB time=00:00:10.30 bitrate= 740.8kbits/s     video:922kB audio:0kB subtitle:0 global headers:0kB muxing overhead 1.030813%

  When the frame at terminal A is still counting (not finished), I type the below at terminal B :

  ffplay rtp://127.0.0.1:1234

  But it does not work :
  The error information is :

  [udp @ 0x7fb370001500] bind failed: Address already in useB f=0/0   
  
  rtp://127.0.0.1:1234: Input/output error

  Why ?

  [Update 1] Following the instruction from Camille Goudeseune
  I used the foo.sdp
  The input for the ffmpeg terminal is :

  ffmpeg -re -i out.avi -f mulaw -f rtp rtp ://127.0.0.1:1235

  The terminal for ffplay is :

  ffplay -i foo.sdp

  The ffplay terminal shows a lot of error, without images.

    libpostproc    52.  2.100 / 52.  2.100
  
  [sdp @ 0x7fafdc0008c0] Undefined type (30)    0KB sq=    0B f=0/0   
  
  [sdp @ 0x7fafdc0008c0] nal size exceeds length: 25453 86 0B f=0/0   
  
  [sdp @ 0x7fafdc0008c0] Consumed more bytes than we got! (-25367)
  
  [sdp @ 0x7fafdc0008c0] nal size exceeds length: 25453 86
  
  [sdp @ 0x7fafdc0008c0] Consumed more bytes than we got! (-25367)
  
  [sdp @ 0x7fafdc0008c0] Unhandled type (27) (See RFC for implementation details
  
  [sdp @ 0x7fafdc0008c0] Undefined type (31)    0KB sq=    0B f=0/0   
  
  [sdp @ 0x7fafdc0008c0] Unhandled type (27) (See RFC for implementation details
  
  [sdp @ 0x7fafdc0008c0] nal size exceeds length: 62414 6130B f=0/0   
  
  [sdp @ 0x7fafdc0008c0] Consumed more bytes than we got! (-61801)
  
  [sdp @ 0x7fafdc0008c0] nal size exceeds length: 62414 613
  
  [sdp @ 0x7fafdc0008c0] Consumed more bytes than we got! (-61801)
  
  [h264 @ 0x7fafdc003020] non-existing PPS referencedq=    0B f=0/0   
  
  [h264 @ 0x7fafdc003020] non-existing PPS 0 referenced
  
  [h264 @ 0x7fafdc003020] decode_slice_header error
  
  [h264 @ 0x7fafdc003020] Invalid mix of idr and non-idr slices
  
  [sdp @ 0x7fafdc0008c0] Undefined type (31)    0KB sq=    0B f=0/0   
  
  [sdp @ 0x7fafdc0008c0] Unhandled type (29) (See RFC for implementation details
  
  [sdp @ 0x7fafdc0008c0] Unhandled type (26) (See RFC for implementation details
  
  [sdp @ 0x7fafdc0008c0] Unhandled type (27) (See RFC for implementation details
  
      Last message repeated 2 times  0KB vq=    0KB sq=    0B f=0/0   
  
  [sdp @ 0x7fafdc0008c0] Undefined type (31)
  
  [sdp @ 0x7fafdc0008c0] Unhandled type (26) (See RFC for implementation details
  
  [sdp @ 0x7fafdc0008c0] Unhandled type (25) (See RFC for implementation details
  
  [h264 @ 0x7fafdc003020] insane cropping not completely supported, this could look slightly wrong ... (left: 2, top: 2)
  
  [h264 @ 0x7fafdc003020] illegal aspect ratio
  
  [h264 @ 0x7fafdc003020] missing picture in access unit with size 84589
  
  [h264 @ 0x7fafdc003020] Partitioned H.264 support is incomplete
  
  [h264 @ 0x7fafdc003020] insane cropping not completely supported, this could look slightly wrong ... (left: 2, top: 2)
  
  [h264 @ 0x7fafdc003020] illegal aspect ratio
  
  [h264 @ 0x7fafdc003020] insane cropping not completely supported, this could look slightly wrong ... (left: 2, top: 2)
  
  [h264 @ 0x7fafdc003020] illegal aspect ratio
  
  [h264 @ 0x7fafdc003020] no frame!
  
  [h264 @ 0x7fafdc003020] RTP: missed 2563 packetsB sq=    0B f=0/0   
  
  [sdp @ 0x7fafdc0008c0] Undefined type (30)
  
      Last message repeated 1 times
  
  [sdp @ 0x7fafdc0008c0] Undefined type (31)

• Unable to run a program in PATH from Java code

  17 novembre 2012, par user1831004

  I am developing a Red5 media server application on a Mac (Dynamic Web Project in Eclipse). The app has to invoke FFMPEG to convert the video to a different format.

  I added "/Applications/FFMPEG" to PATH variable by running the following command in Terminal :

  echo 'export PATH=/Applications/FFMPEG:$PATH' >> ~/.profile

  When I invoke FFMPEG from terminal, it works fine. However, every time I run it from Java code with :

  Process p = Runtime.getRuntime().exec("ffmpeg");
  
  p.waitFor();

  I get the following error :

  Cannot run program "ffmpeg": error=2, No such file or directory

  I thought this might be a security limitation specific to the type of project, but even a simple Java program produces the same result. What am I missing ?

  ---

  Changing "ffmpeg" to full path of the application works, but I don't want to upload FFMPEG into the same directory as Red5 on a production server.