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• FFMPEG for Android - missing alsa format

  24 août 2012, par user1545779

  @rowntreerob has an android-ffmpeg implementation that build successfully using the default file settings.

  When you remove disble-avdevice and disbale-devices from the configure_ffmpeg script, ndk-build fails. The following is the error message :

  CP ffmpeg
  STRIP ffmpeg
   /android-ffmpeg/Project/jni
   /android-ffmpeg/Project/jni
   /android-ffmpeg/Project/jni
  jasongipsyblues@android-master : /android-ffmpeg/Project/jni$ ndk-build
  Compile thumb : ffmpeg <= ffmpeg.c
  Compile thumb : ffmpeg <= cmdutils.c
  Executable : ffmpeg
  /home/jasongipsyblues/android-ffmpeg/Project/obj/local/armeabi- >v7a/objs/ffmpeg/ffmpeg/ffmpeg.o : In function `main' :

  /home/jasongipsyblues/android-ffmpeg/Project/jni/ffmpeg/ffmpeg.c:6130 : undefined >reference to `avdevice_register_all'
  

  /home/jasongipsyblues/android-ffmpeg/Project/obj/local/armeabi- >v7a/objs/ffmpeg/ffmpeg/cmdutils.o : In function `print_all_libs_info' :

  /home/jasongipsyblues/android-ffmpeg/Project/jni/ffmpeg/cmdutils.c:639 : undefined >reference to `avdevice_configuration'

  /home/jasongipsyblues/android-ffmpeg/Project/jni/ffmpeg/cmdutils.c:639 : undefined >reference to `avdevice_version'
  
  collect2 : ld returned 1 exit status

  make : ** [/home/jasongipsyblues/android-ffmpeg/Project/obj/local/armeabi-v7a/ffmpeg] >Error 1

  Please pardon my poor formating skills, I still dont get the formating thing. It appears the deletion of the references is to avdevices is definitely affecting the use of ndk-build.

  All the alsa source files exist in the ffmpeg code. How does one build ffmpeg in such a way that alsa is included in the formats ?

• ffmpeg + ffserver : "Broken ffmpeg default settings detected"

  18 octobre 2012, par Chris Nolet

  I'm just trying to connect ffmpeg to ffserver and stream rawvideo.

  I keep getting the error : broken ffmpeg default settings detected from libx264 and then Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height from ffmpeg before it exits.

  I'm launching ffmpeg with the command : ffmpeg -f x11grab -s 320x480 -r 10 -i :0.0 -tune zerolatency http://localhost:8090/feed1.ffm

  My ffserver.conf file (for ffserver) looks like this :

  Port 8090
  
  BindAddress 0.0.0.0
  
  MaxHTTPConnections 2000
  
  MaxClients 1000
  
  MaxBandwidth 1000
  
  CustomLog -
  
  NoDaemon
  
  
  
  <feed>
  
    ACL allow 127.0.0.1
  
  </feed>
  
  
  
  <stream>
  
    Feed feed1.ffm
  
    Format asf
  
  
  
    NoAudio
  
  
  
    VideoBitRate 128
  
    VideoBufferSize 400
  
    VideoFrameRate 24
  
    VideoSize 320x480
  
  
  
    VideoGopSize 12
  
  
  
    VideoQMin 1
  
    VideoQMax 31
  
  
  
    VideoCodec libx264
  
  </stream>
  
  
  
  <stream>
  
    Format status
  
  </stream>

  And the full output is :

  ffmpeg version N-45614-g364c60b Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Oct 17 2012 04:34:04 with Apple clang version 4.1 (tags/Apple/clang-421.11.65) (based on LLVM 3.1svn)
  
    configuration: --enable-shared --enable-libx264 --enable-libmp3lame --enable-x11grab --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --cc=/usr/bin/clang --host-cflags='-Os -w -pipe -march=native -Qunused-arguments -mmacosx-version-min=10.7' --extra-cflags='-x objective-c' --extra-ldflags='-framework Foundation -framework Cocoa -framework CoreServices -framework ApplicationServices -lobjc'
  
    libavutil      51. 76.100 / 51. 76.100
  
    libavcodec     54. 66.100 / 54. 66.100
  
    libavformat    54. 32.101 / 54. 32.101
  
    libavdevice    54.  3.100 / 54.  3.100
  
    libavfilter     3. 19.103 /  3. 19.103
  
    libswscale      2.  1.101 /  2.  1.101
  
    libswresample   0. 16.100 /  0. 16.100
  
    libpostproc    52.  1.100 / 52.  1.100
  
  [x11grab @ 0x7f87dc01e200] device: :0.0 -> display: :0.0 x: 0 y: 0 width: 320 height: 480
  
  [x11grab @ 0x7f87dc01e200] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, x11grab, from ':0.0':
  
    Duration: N/A, start: 1350517708.386699, bitrate: 49152 kb/s
  
      Stream #0:0: Video: rawvideo (BGRA / 0x41524742), bgra, 320x480, 49152 kb/s, 10 tbr, 1000k tbn, 10 tbc
  
  [tcp @ 0x7f87dc804120] TCP connection to localhost:8090 failed: Connection refused
  
  [tcp @ 0x7f87dc804b20] TCP connection to localhost:8090 failed: Connection refused
  
  [libx264 @ 0x7f87dd801000] broken ffmpeg default settings detected
  
  [libx264 @ 0x7f87dd801000] use an encoding preset (e.g. -vpre medium)
  
  [libx264 @ 0x7f87dd801000] preset usage: -vpre <speed> -vpre <profile>
  
  [libx264 @ 0x7f87dd801000] speed presets are listed in x264 --help
  
  [libx264 @ 0x7f87dd801000] profile is optional; x264 defaults to high
  
  Output #0, ffm, to &#39;http://localhost:8090/feed1.ffm&#39;:
  
    Metadata:
  
      creation_time   : now
  
      Stream #0:0: Video: h264, yuv420p, 160x128, q=2-31, 128 kb/s, 1000k tbn, 10 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (rawvideo -> libx264)
  
  Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
  
  </profile></speed>

  Any help much appreciated :)

• FFMPEG - format not available ?

  16 mai 2013, par Julien Greard

  I'm converting some code from FFMPEG 0.8 to FFMPEG 1.2. I have an error during the call to the method avcodec_open2() : "Specified pixel format %s is invalid or not supported". The format I use is : AV_PIX_FMT_RGB24. It should be enabled by default, right ?

  Below is my code :

  av_register_all();
  
  
  
  codec = avcodec_find_encoder(AV_CODEC_ID_MPEG2VIDEO);
  
  
  
  if(!codec)
  
  {
  
      throw SystemException("codec not found");
  
  }
  
  
  
  codecContext = avcodec_alloc_context3(codec);
  
  
  
  codecContext->bit_rate = 200000;
  
  codecContext->time_base.den = 1;
  
  codecContext->time_base.num = 90000;
  
  codecContext->gop_size = 8;
  
  codecContext->pix_fmt = AV_PIX_FMT_RGB24;
  
  
  
  _codecContext->width = 320
  
  _codecContext->height = 240
  
  
  
  if(avcodec_open2(_codecContext, _codec, NULL) < 0)
  
  {
  
      throw SystemException("Unable to open codec");
  
  }