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• Can't play rtp stream from ffmpeg/avconv, no data received

  6 mars 2014, par Foo Barazz

  I started avserver on my Raspberry Pi, webcam attached I read from /dev/video0 with

  pi@raspberrypi $ avconv -f video4linux2 -i /dev/video0 -vcodec mpeg2video -r 25 - pix_fmt yuv420p -me_method epzs -b 2600k -bt 256k -f rtp rtp://192.168.0.124:8090
  
  
  
  avconv version 0.8.6-6:0.8.6-1+rpi1, Copyright (c) 2000-2013 the Libav developers
  
    built on Mar 31 2013 13:58:10 with gcc 4.6.3
  
  [video4linux2 @ 0x17c1720] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, video4linux2, from '/dev/video0':
  
    Duration: N/A, start: 615.594215, bitrate: 36864 kb/s
  
      Stream #0.0: Video: rawvideo, yuyv422, 320x240, 36864 kb/s, 30 tbr, 1000k tbn, 30 tbc
  
  [buffer @ 0x17c16e0] w:320 h:240 pixfmt:yuyv422
  
  [avsink @ 0x17c2f00] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'out'
  
  [scale @ 0x17c34c0] w:320 h:240 fmt:yuyv422 -> w:320 h:240 fmt:yuv420p flags:0x4
  
  Output #0, rtp, to 'rtp://192.168.0.124:8090':
  
    Metadata:
  
      encoder         : Lavf53.21.1
  
      Stream #0.0: Video: mpeg2video, yuv420p, 320x240, q=2-31, 2600 kb/s, 90k tbn, 25 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (rawvideo -> mpeg2video)
  
  SDP:
  
  v=0
  
  o=- 0 0 IN IP4 127.0.0.1
  
  s=No Name
  
  c=IN IP4 192.168.0.124
  
  t=0 0
  
  a=tool:libavformat 53.21.1
  
  m=video 8090 RTP/AVP 32
  
  b=AS:2600
  
  
  
  Press ctrl-c to stop encoding
  
  frame=  576 fps= 25 q=2.0 size=    2133kB time=23.00 bitrate= 759.8kbits/s dup=390 drop=0    
  
  frame=  590 fps= 25 q=2.0 size=    2191kB time=23.56 bitrate= 762.0kbits/s dup=400 drop=0    
  
  frame= 1320 fps= 25 q=2.0 size=    4932kB time=52.76 bitrate= 765.8kbits/s dup=908 drop=0
  
  ...

  Seems to work fine, it reads data from the webcam.

  Now I'm trying to simply play with ffplay from my Mac with

  $ ffplay rtp://192.168.0.124:8090
  
  ffplay version 1.2.4 Copyright (c) 2003-2013 the FFmpeg developers
  
    built on Mar  1 2014 15:18:21 with Apple LLVM version 5.0 (clang-500.2.79) (based on LLVM 3.3svn)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/1.2.4 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --enable-vda --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid --enable-libfreetype --enable-libtheora --enable-libvorbis --enable-libvpx --enable-librtmp --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-aacenc --enable-libass --enable-ffplay --enable-libspeex --enable-libschroedinger --enable-libfdk-aac --enable-libopus --enable-frei0r --enable-libopenjpeg --extra-cflags='-I/usr/local/Cellar/openjpeg/1.5.1/include/openjpeg-1.5 '
  
    libavutil      52. 18.100 / 52. 18.100
  
    libavcodec     54. 92.100 / 54. 92.100
  
    libavformat    54. 63.104 / 54. 63.104
  
    libavdevice    54.  3.103 / 54.  3.103
  
    libavfilter     3. 42.103 /  3. 42.103
  
    libswscale      2.  2.100 /  2.  2.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  2.100 / 52.  2.100
  
      nan A-V:  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
  
      nan A-V:  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
  
      nan A-V:  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0 
  
      ...

  The video doesn't open and it seems to not reading any data from the Raspberry Pi.

  I use the default configuration for avserver.
  The webcam is definitely working as I managed to just write out images with avconv from it.

  What did I miss ?

• ffmpeg not work with PHP exec()

  14 mars 2014, par user27133

  I need to convert video and create image using ffmpeg. I downloaded this package from zeranoe for windows 8 64x and put in c:/ffmpeg folder.

  I check for ffmpeg installed in windows using cmd : ffmpeg -version

  ffmpeg version N-60959-g669043d
  
  built on Feb 27 2014 22:07:15 with gcc 4.8.2 (GCC)
  
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avis
  
  ynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable
  
  -iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype
  
  --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enabl
  
  e-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-lib
  
  opus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspee
  
  x --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aace
  
  nc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpac
  
  k --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-z
  
  lib
  
  libavutil      52. 66.100 / 52. 66.100
  
  libavcodec     55. 52.102 / 55. 52.102
  
  libavformat    55. 33.100 / 55. 33.100
  
  libavdevice    55. 10.100 / 55. 10.100
  
  libavfilter     4.  2.100 /  4.  2.100
  
  libswscale      2.  5.101 /  2.  5.101
  
  libswresample   0. 18.100 /  0. 18.100
  
  libpostproc    52.  3.100 / 52.  3.100

  Now I test convert video using php :

  $raw_video_path = 'C:\xampp\htdocs\video\ff\examples\5.flv';
  
  $new_flv = DIRNAME(DIRNAME(__FILE__)).'/ff/examples/video/2654.flv';
  
  $new_png = DIRNAME(DIRNAME(__FILE__)).'/ff/examples/video/2647-resampled.jpg';
  
  
  
  @exec("ffmpeg -i ".$raw_video_path."  -ab 56 -ar 44100 -b 200 -r 15 -s 320x240 -f flv ".$new_flv."");
  
  @exec("ffmpeg  -itsoffset -4  -i ".$new_flv." -vcodec mjpeg -vframes 1 -an -f rawvideo -s 320x240 ".$new_png." ");

  Now, This not work for me !! How do I can fix this ?

  For ffmpeg, I need to install/active php ffmpeg extension ?

• Why does PowerShell closes ff-prompt.bat before executing my commands

  9 mars 2014, par sebastian

  Okay guys looks like I have another question to ask, which is kind of related to my last question, which can be found on here : How to start ffprobe with Windows PowerShell. There I was asking how to start ffprobe with Windows PowerShell and after trying out a few things I got it, well lets say, started for a second before it closes again.
  I tried it with following commands in PowerShell :

  $env:Path = ';C:\Users\Administrator\bin\'
  
  $title = "A_Day_for_Cake_and_Accidents"
  
  Start-Process ff-prompt.bat -ArgumentList "ffprobe -show_streams -select_streams v -print_format xml -count_frames C:\Users\Administrator\Desktop\dcp_bearbeitet\$title\$title.mov > C:\Users\Administrator\Desktop\dcp_bearbeitet\$title\totalframes.xml"

  The result, and that is the strange thing, is the xml file with only the standard text from the ff-prompt.bat, which looks like this :

  C :\Users\Administrator>ECHO OFF
  ffmpeg version N-60959-g669043d
  built on Feb 27 2014 22:01:58 with gcc 4.8.2 (GCC)
  configuration : —enable-gpl —enable-version3 —disable-w32threads —enable-avisynth —enable-bzlib —enable-fontconfig —enable-frei0r —enable-gnutls —enable-iconv —enable-libass —enable-libbluray —enable-libcaca —enable-libfreetype —enable-libgsm —enable-libilbc —enable-libmodplug —enable-libmp3lame —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libopenjpeg —enable-libopus —enable-librtmp —enable-libschroedinger —enable-libsoxr —enable-libspeex —enable-libtheora —enable-libtwolame —enable-libvidstab —enable-libvo-aacenc —enable-libvo-amrwbenc —enable-libvorbis —enable-libvpx —enable-libwavpack —enable-libx264 —enable-libx265 —enable-libxavs —enable-libxvid —enable-zlib
  libavutil 52. 66.100 / 52. 66.100
  libavcodec 55. 52.102 / 55. 52.102
  libavformat 55. 33.100 / 55. 33.100
  libavdevice 55. 10.100 / 55. 10.100
  libavfilter 4. 2.100 / 4. 2.100
  libswscale 2. 5.101 / 2. 5.101
  libswresample 0. 18.100 / 0. 18.100
  libpostproc 52. 3.100 / 52. 3.100
  For help run : ffmpeg -h
  For formats run : ffmpeg -formats | more
  For codecs run : ffmpeg -codecs | more
  Current directory is now : "C :\Users\Administrator\bin"
  The bin directory has been added to PATH

  My first thought was, that it did not work at all, but then I was wondering why I get an XML file when it is not working at all. PowerShell executes the ff-prompt.bat for maybe a second, before PowerShell shuts down the ff-prompt.bat again without doing half of my commands. Does anybody know why ff-prompt gets closed before executing all of my commands ?

  EDIT : So what I tried is something that should execute it directly, but in fact I get a shitload of errors :

  $title = "A_Day_for_Cake_and_Accidents"
  
  $Cmd = ‘C:\Users\Administrator\ffmpeg\bin\ffprobe.exe’
  
  $Arg1 = ’ffprobe '
  
  $Arg2 = ‘-show_streams ’
  
  $Arg3 = ‘-select_streams v '
  
  $Arg4 = ‘-print_format xml '
  
  $Arg5 = ‘-count_frames '
  
  $Arg6 = "C:\Users\Administrator\Desktop\dcp_bearbeitet\$title\$title.mov >"
  
  $Arg7 = " C:\Users\Administrator\Desktop\dcp_bearbeitet\$title\totalframes.xml"
  
  & $Cmd $Arg1 $Arg2 $Arg3 $Arg4 $Arg5 $Arg6 $Arg7

  Error message(s) I get :

  "ffprobe.exe
  Failed to set value '-select_streams v ' for option 'show_streams ' : Option not found"

  The problem I am facing now is that -show_streams does not get a value, so maybe that is the reason why he uses the next parameter as a value, is there anything I can do ?