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• How to scale watermark in percent with ffmpeg ? [duplicate]

  31 décembre 2015, par user3390767

  This question already has an answer here :

  • How to scale and position watermark to scale ?
    
    1 answer
    

  I run a video site, but watermark logo still in different sizes in every video with different resolution.
  My question : is there a way to scale watermark image in every video by some kind of percentage ?
  I use next command :

  /usr/bin/ffmpeg -i video_in.mp4 -f mp4 -vcodec libx264 -r 30 -movflags
  faststart -profile:v baseline -vf "movie=logo.png, scale=200:37
  [watermark] ; [in][watermark] overlay=10:10 [out]" -s 640x360 -acodec
  libfaac -ab 128k -ar 44100 video_out.mp4

  So as you see the scale of watermark is static, but I want to make it dynamic. Is there way to do this in percentage by depending of video resolution ?

  Cheers !

• vf_colorspace : Interpret unspecified color range as limited range

  19 septembre 2016, par Vittorio Giovara

  vf_colorspace : Interpret unspecified color range as limited range
  This is the assumption that is made in pixel format conversion do
  
  throughout the code (in particular swscale), and BT-specifications
  
  mandate.
  Add a warning to inform the user that an automatic selection is being
  
  made.
  Signed-off-by : Vittorio Giovara <vittorio.giovara@gmail.com>
  
  Signed-off-by : Ronald S. Bultje <rsbultje@gmail.com>
  

  • [DH] libavfilter/vf_colorspace.c

• 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";