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• ffmpeg c#asp video conversion

  19 avril 2014, par Arun Kumar

  I am trying to convert one flv video to mp4 video. Why this
  following code results error ? it gives exception as "No process is
  associated with this object." The parameters

  "Path_FFMPEG"="E:\\Arun Kumar\\Main Project\\Advertisement Demo\\Advertisementdemo\\Advertisementdemo\\ffmpeg\\bin\\ffmpeg.exe"    and "strParam"="-i E:\\Arun Kumar\\Main Project\\Advertisement Demo\\Advertisementdemo\\Advertisementdemo\\Videos\\cars1.flv -same_quant E:\\Arun Kumar\\Main Project\\Advertisement Demo\\Advertisementdemo\\Advertisementdemo\\Videos\\ConvertedFiles\\cars1.mp4"

  Process ffmpeg = new Process();
  
  ProcessStartInfo ffmpeg_StartInfo = new ProcessStartInfo(Path_FFMPEG, strParam);
  
  ffmpeg_StartInfo.UseShellExecute = false;
  
  ffmpeg_StartInfo.RedirectStandardError = true;
  
  ffmpeg_StartInfo.RedirectStandardOutput = true;
  
  ffmpeg.StartInfo = ffmpeg_StartInfo;
  
  ffmpeg_StartInfo.CreateNoWindow = true;
  
  ffmpeg.EnableRaisingEvents = true;
  
  ffmpeg.Start();
  
  ffmpeg.WaitForExit();
  
  ffmpeg.Close();
  
  ffmpeg.Dispose();
  
  ffmpeg = null;

• Encode flv video with no audio with ffmpeg

  15 avril 2012, par David Bengoa

  I'm making an application that needs to convert videos to webm or mp4, it works great with all videos I've tried, but it fails if I use a flv file with no audio channels.

  $ ffmpeg -i 0986229665-339108519108-86498841039-6078455325.flv out.webm
  
  ffmpeg version 0.7.3-4:0.7.3-0ubuntu0.11.10.1, Copyright (c) 2000-2011 the Libav developers
  
    built on Jan  4 2012 16:08:51 with gcc 4.6.1
  
    configuration: --extra-version='4:0.7.3-0ubuntu0.11.10.1' --arch=amd64 --prefix=/usr --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --enable-shared --disable-static
  
    WARNING: library configuration mismatch
  
    avutil      configuration: --extra-version='4:0.7.3ubuntu0.11.10.1' --arch=amd64 --prefix=/usr --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --enable-runtime-cpudetect --enable-vaapi --enable-libopenjpeg --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdirac --enable-libmp3lame --enable-librtmp --enable-libx264 --enable-libxvid --enable-libvo-aacenc --enable-version3 --enable-libvo-amrwbenc --enable-version3 --enable-libdc1394 --enable-shared --disable-static
  
    avcodec     configuration: --extra-version='4:0.7.3ubuntu0.11.10.1' --arch=amd64 --prefix=/usr --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --enable-runtime-cpudetect --enable-vaapi --enable-libopenjpeg --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdirac --enable-libmp3lame --enable-librtmp --enable-libx264 --enable-libxvid --enable-libvo-aacenc --enable-version3 --enable-libvo-amrwbenc --enable-version3 --enable-libdc1394 --enable-shared --disable-static
  
    libavutil    51.  7. 0 / 51.  7. 0
  
    libavcodec   53.  6. 0 / 53.  6. 0
  
    libavformat  53.  3. 0 / 53.  3. 0
  
    libavdevice  53.  0. 0 / 53.  0. 0
  
    libavfilter   2.  4. 0 /  2.  4. 0
  
    libswscale    2.  0. 0 /  2.  0. 0
  
    libpostproc  52.  0. 0 / 52.  0. 0
  
  [flv @ 0x2184560] Could not find codec parameters (Audio: [0][0][0][0] / 0x0000, 0 channels)
  
  [flv @ 0x2184560] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, flv, from '0986229665-339108519108-86498841039-6078455325.flv':
  
    Metadata:
  
      audiocodecid    : -1
  
      server          : Red5 Server 1.0.0 RC1 $Rev: 4193 $
  
      duration        : 3
  
      canSeekToEnd    : true
  
      videocodecid    : 2
  
    Duration: 00:00:03.02, start: 0.000000, bitrate: N/A
  
      Stream #0.0: Video: flv, yuv420p, 640x362, 1k tbr, 1k tbn, 1k tbc
  
      Stream #0.1: Audio: [0][0][0][0] / 0x0000, 0 channels
  
  Incompatible sample format '(null)' for codec 'libvorbis', auto-selecting format 's16'
  
  [buffer @ 0x21852c0] w:640 h:362 pixfmt:yuv420p
  
  [libvpx @ 0x2184040] v0.9.6
  
  [libvorbis @ 0x2185ee0] oggvorbis_encode_init: init_encoder failed
  
  Output #0, webm, to 'out.webm':
  
      Stream #0.0: Video: libvpx, yuv420p, 640x362, q=2-31, 200 kb/s, 90k tbn, 1k tbc
  
      Stream #0.1: Audio: libvorbis, 0 channels, s16, 64 kb/s
  
  Stream mapping:
  
    Stream #0.0 -> #0.0
  
    Stream #0.1 -> #0.1
  
  Error while opening encoder for output stream #0.1 - maybe incorrect parameters such as bit_rate, rate, width or height

  If I pass the -an option, it works, but I can't do that because then all videos wouldn't have audio.

  Any ideas ?

• sendBook and saveBook should return the filename

  26 septembre 2013, par Grandt

  sendBook and saveBook should return the filename
  Rev. 2.13 - 2013-09-26
  
  * Fixed : sendBook and saveBook returned boolean TRUE/FALSE depending on
  
  if the sending was successful. The sanitized/used filename was never
  
  exposed. The methods now return the filename used for sending, or FALSE
  
  if it failed.
  
  * Change : sanitizeFileName is now a public function.