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• AForge.Video.FFMPEG used in C#

  30 décembre 2018, par cuong nguyen

  I use Visual C# 2008 and want to write AVI file from bmp sequences.

  I found AForge.Video.VWF but it’s just for "vmw3" or "DIB " codecs and I want to use AForge.Video.FFMPEG but it got error.

  For example I just code :

  using System;
  
  using System.Collections.Generic;
  
  
  
  using System.Linq;
  
  using System.Text;
  
  using AForge.Video.FFMPEG;
  
  
  
  namespace ConsoleApplication4
  
  {
  
      class Program
  
      {
  
          static void Main(string[] args)
  
          {
  
              VideoFileWriter vfw = new VideoFileWriter();
  
          }
  
      }
  
  }

  But I got this filenotfoundexception

  {"The specified module could not be found. (Exception from HRESULT: 0x8007007E)":null}

• How can I add audio (mp3) to a flv (just video) with ffmpeg ?

  18 juillet 2012, par domi

  How can I add sound from a mp3-file to a flv file that has no audio ?
  (With ffmpeg)

  When I use

  ffmpeg -i video.flv -i audio.mp3 -acodec copy -vcodec copy -ab 128k -ar 44100 output.flv
  

  I get this output :
  

  FFmpeg version SVN-r12758, Copyright (c) 2000-2008 Fabrice Bellard, et al.
    configuration : —enable-shared —prefix=/usr
    libavutil version : 49.6.0
    libavcodec version : 51.54.0
    libavformat version : 52.13.0
    libavdevice version : 52.0.0
    built on Apr  7 2008 09:00:42, gcc : 4.1.2 20070626 (Red Hat 4.1.2-14)
  [flv @ 0x2b72415e00c0]Could not find codec parameters (Audio : 0x0000)
  Input #0, flv, from 'video.flv' :
    Duration : 00:00:03.2, start : 0.000000, bitrate : N/A
      Stream #0.0 : Video : flv, yuv420p, 468x312, 1000.00 tb(r)
      Stream #0.1 : Audio : 0x0000
  mdb:511, lastbuf:0 skipping granule 0
  mdb:511, lastbuf:0 skipping granule 0
  mdb:511, lastbuf:0 skipping granule 1
  mdb:511, lastbuf:0 skipping granule 1
  Input #1, mp3, from 'audio.mp3' :
    Duration : 00:01:00.9, start : 0.000000, bitrate : 128 kb/s
      Stream #1.0 : Audio : mp3, 44100 Hz, stereo, 128 kb/s
  Output #0, flv, to 'output.flv' :
      Stream #0.0 : Video : flv, yuv420p, 468x312, q=2-31, 1000.00 tb(c)
      Stream #0.1 : Audio : 0x0000
  Stream mapping :
    Stream #0.0 -> #0.0
    Stream #0.1 -> #0.1
  [flv @ 0x2b72415e00c0]sample rate not set
  Could not write header for output file #0 (incorrect codec parameters ?)
  

• Retrieving information from ffmpeg shell_exec command

  29 août 2012, par user1503606

  i am doing the following

  $output = shell_exec('/usr/local/bin/ffmpeg -i intro.mp3 2>&1'); 
  
  echo "<pre>$output</pre>";

  This outputs

  ffmpeg version 0.8.5, Copyright (c) 2000-2011 the FFmpeg developers
  
    built on Aug 20 2012 09:28:43 with clang 3.1 (tags/Apple/clang-318.0.61)
  
    configuration: --enable-nonfree --enable-gpl --enable-version3 --enable-postproc --enable-swscale --enable-avfilter --enable-libmp3lame --enable-libvorbis --enable-libtheora --enable-libfaac --enable-libxvid --enable-libx264 --enable-libvpx --enable-hardcoded-tables --enable-shared --enable-pthreads --disable-indevs --cc=clang
  
    libavutil    51.  9. 1 / 51.  9. 1
  
    libavcodec   53.  7. 0 / 53.  7. 0
  
    libavformat  53.  4. 0 / 53.  4. 0
  
    libavdevice  53.  1. 1 / 53.  1. 1
  
    libavfilter   2. 23. 0 /  2. 23. 0
  
    libswscale    2.  0. 0 /  2.  0. 0
  
    libpostproc  51.  2. 0 / 51.  2. 0
  
  [mp3 @ 0x7f9481807c00] max_analyze_duration 5000000 reached at 5015510
  
  Input #0, mp3, from 'intro.mp3':
  
    Metadata:
  
      album           : Frank 
  
      artist          : Amy Winehouse
  
      genre           : R&B
  
      title           : [Intro] Stronger Than Me
  
      track           : 01
  
      date            : 2008
  
    Duration: 00:03:54.71, start: 0.000000, bitrate: 230 kb/s
  
      Stream #0.0: Audio: mp3, 44100 Hz, stereo, s16, 160 kb/s
  
  At least one output file must be specified

  i want to get the information to insert into a database album,artist,genre,title etc

  But all seperately

  i can get them by doing the following

  $output = shell_exec('/usr/local/bin/ffmpeg -i intro.mp3 2>&1'); 
  
  
  
  $edit = explode('  ', $output);
  
  $edit = implode("@", $edit);
  
  $edit = explode(':', $output);
  
  echo "<pre>";
  
  print_r($edit);
  
  echo "</pre>";

  then running

  <?php echo $edit[9]; ?>

  etc

  but this seems like a really bad way and annoying way to get values and sometimes the output is slightly different which messes with the outputs.

  Whats the best way to do this or am i stuck doing this ?