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• Unable to Creating Video File from one audio file and single image file in windows form c# using ffmpeg.exe

  25 juillet 2018, par MoonTech

  Hello I created one form for creating video from one mp3 file and one jpg file.
  For this I Wrote this Code but this is not the answer.

   private void button2_Click(object sender, EventArgs e)
  
      {         
  
          string input_audio = @"C:\Users\...\Desktop\test\audio";        
  
  
  
          string outPut = @"C:\Users\...\Desktop\test\outputvideo";
  
          string img= @"C:\Users\...\Desktop\folder image\image123";
  
  
  
          stripAudioTest(img, input_audio,  outPut);
  
  
  
      }
  
  
  
      public void stripAudioTest(string image, string AudioFile, string outputfile)
  
      {
  
          string FFMPEG_PATH = "ffmpeg.exe";          
  
  
  
          string strParam = "-loop 1 -i "+ image+".jpg  -i "+ AudioFile+ ".mp3 -c:v libx264 -c:a aac -strict experimental -b:a 128k -shortest "+ outputfile+ ".mp4";                    
  
  
  
          process(FFMPEG_PATH, strParam);
  
  
  
      }
  
  
  
      public void process(string Path_FFMPEG, string strParam)
  
      {
  
          try
  
          {
  
              Process ffmpeg = new Process();
  
              ffmpeg.StartInfo.UseShellExecute = false;
  
              ffmpeg.StartInfo.RedirectStandardOutput = true;              
  
              ffmpeg.StartInfo.CreateNoWindow = true;
  
              ffmpeg.StartInfo.FileName = Path_FFMPEG;
  
              ffmpeg.StartInfo.Arguments = strParam;               
  
              ffmpeg.Start();
  
              ffmpeg.StartInfo.ErrorDialog = true;             
  
              ffmpeg.WaitForExit();
  
  
  
          }
  
          catch (Exception ex)
  
          {
  
              MessageBox.Show(ex.Message);
  
          }
  
      }

  FYI : mp3 file Duration 5 minutes and 23 Seconds .
  1. I am new in FFmpeg so I don’t have idea how to get out of this.
  2. I Got ffmpeg command from Here
  3. I tried Few of more ffmpeg command .Please check it below.

  string strParam = "-y -stream_loop -1 -i " + image + ".jpg -i " + AudioFile + ".mp3 -y -r 25 -b 2500k - acodec ac3 - ab 384k - vcodec mpeg4 " + outputfile+".mp4";

  another one

  string strParam = "-loop 1 -i " + image + ".jpg -i " + AudioFile+ ".mp3 -c:v libx264 -tune stillimage -c:a aac -strict experimental -b:a 192k -pix_fmt yuv420p -shortest " + outputfile+".mp4";

• unwanted bitrate reduction in MOD to mp4 conversion with ffmpeg

  18 juillet 2014, par Brian

  My Panasonic camcorder records video to a .MOD file.
  On Windows... (my linux box currently has network issues :)

  ffmpeg -i file.MOD

  yields

  bitrate: 9579 kb/s
  
  video: mpeg2video yuv 420p 704x480 [SAR 10:11 DAR 4:3] 
  
  29:97 fps, 29.97 tbr, 90k tbn, 59.94 tbc

  I tried

  ffmpeg -loglevel verbose -i file.MOD file.mp4
  
  ffmpeg -loglevel verbose -i file.MOD -qscale 0 file.mp4
  
  ffmpeg -loglevel verbose -i file.MOD -qscale 1 file.mp4

  Each of these yields the same bitrate of 2604 and a video codec of h264 (High).
  My original file was 22,786 KB and the new files are each 6,217 KB.

  My goal/purpose is for lossless conversion of the .MOD files for video editing, probably using blender.

  So my big question is "How do I do lossless video conversion of .MOD files using ffmpeg to a format that blender and other common video editing tools can work with ?"

  But for educational purposes (and posterity) I am also curious why the bitrate is being reduced by the conversions above and why there is no difference when using the -qscale argument.

• Ffmpeg adds unwanted metadata

  2 mai 2023, par Mister Woyng

  we use ffmpeg in WooCommerce to give Customers the possibility to listen to a 30sec sample of the MP3 file they'd like to buy, and also to create a full MP3 version

  


  Since 2 days, both the full and the 30sec MP3s have little blips and pings on a regular interval, every 6 seconds in one case.

  


  Nobody has changed anything in the ffmpeg code

  


  I have opened the unconverted MP3 (the "before" version) and the converted MP3 (the "after" version") in a merging tool, Winmerge.

  


  It shows that the 2 files are mostly identical, but there are differences on a regular interval, something is added. It includes a number of hex characters, 2 line breaks and "audio/mpeg". Looks a bit like this :

  


  (00)(00)(02)(00)(10)

audio/mpeg(12)€€(08)


  


  This happens until the end of the file. The regular rhythm of appearance corresponds to the regular rhythm of the audible blips and pings.

  


  The other big difference is the header. Here, a big chunk is added, with lots of hex charaters and a few words :
ID3, #TSSE, Lavf58.45.100, Info

  


  I have searched for Lavf and found out that it's a part of ffmpeg.

  


  This added data is probably metadata, and I'd like to remove it. What can I do ?

  


  Can I remove the metadata ? Can I change the encoder ?

  


  (I have no real experience in Linux development, I use PHP shell_exec with this :

  


  ffmpeg -f lavfi -i anullsrc=channel_layout=stereo:sample_rate=4100 -t '.$duration.' out.mp3 -y'


  


  Thanks !