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• asp.net ffmpeg : The system cannot find the file specified

  19 juin 2016, par Malik

  I am doing code for extracting image from video using ffmpeg. But gone stuck what this means. I also have checked

  ffmpeg -i F:\MIC\stream\finalstream\casper\small.mp4  -an -ss 00:00:03 -s 108*80 -vframes 1 -f image2 -vcodec mjpeg F:/MIC/stream/finalstream/caspe
  
  r/output11.png 

  on cmd line and working fine but dont understand why this is not happening in asp.net ?

  here is my code this function happens on button click event :

  protected void Capture(object sender, EventArgs e)
  
          {
  
  
  
              string InputFile = @"F:\MIC\stream\finalstream\casper\small.mp4";
  
              string ThumbnailsPath = @"F:\MIC\stream\finalstream\casper\testimage.jpg";
  
              System.Diagnostics.Process proc = new System.Diagnostics.Process();
  
              proc.EnableRaisingEvents = false;
  
              proc.StartInfo.FileName = Page.MapPath("~/ffmpeg.exe");
  
              proc.StartInfo.Arguments = "-i F:/MIC/stream/finalstream/casper/small.mp4  -an -ss 00:00:03 -s 108*80 -vframes 1 -f image2 -vcodec mjpeg F:/MIC/stream/finalstream/casper/ output11.png";
  
              proc.Start();
  
  
  
  
  
          }

  while running i got this Error :
  

  Any idea ????

• Is there a way to compile code on a Mac in a sandbox so it doesn't potentially affect my system if something goes wrong ?

  31 mars 2012, par Eli Greenberg

  I'm going to attempt to build ffmpeg with a bunch of libraries included and I would like to keep my current system clean in case it all goes to shit. Is there a way to compile programs like ffmpeg so that they don't affect the system if something goes wrong ?

  I'm a beginner at this stuff, so if this question is misguided and there is no danger in compiling programs please let me know :)

• Extract just the audio link from a youtube video without converting

  27 janvier, par MR-4O4

  I know there are hundreds of sites to convert youtube video to mp3. Most of them do it by first downloading the video and then converting it to mp3(or any other audio format) on their server using youtube-dl, ffmpeg or similar programs.

  



  What I want to know is, is there any way I can just extract the audio link for any youtube video ? I don't know if it's possible but I saw a couple of websites doing it .

  



  First Website : Openaisearch.com
This website simply gives a download link for the audio(getting it from youtube videos). I searched for a song and saw the download url, it looked something like this :

  



  https://redirector.googlevideo.com/videoplayback?source=youtube&requiressl=yes&clen=3814013&upn=dzwY9aUVYME&lmt=1469875393441562&expire=1484854959&mime=audio%2Fmp4&nh=IgpwcjAxLnNlYTA5Kg01Mi45NS4yMTYuMTAy&itag=140........... 


  



  I believe that this is not done by first downloading and converting the video to audio format(Correct me if I am wrong).
Although the file which gets downloaded after using this link is without any extension, but adding ".m4a" at the end of downloaded file does the work.

  



  Second Website : http://keepvid.com/ ?url=https ://www.youtube.com/watch?v=PT2_F-1esPk

  



  Again similar website with similar audio link. You can check by visiting the URL and see link of audio files.

  



  Any idea how these websites get that "googlevideo.com" link ? Do they scrap the youtube video links or something ?

  



  Thanks.