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• ffmpeg to validate video format is genune and store error into string

  7 janvier 2019, par hari krishna

  Since there are hackers uploading malicious software’s in name of video extensions(.mp4,webm..etc) in websites. I tried to validate videos uploaded from file upload in asp.net.This website helped me to find a way to do this operation using ffmpeg
  https://superuser.com/questions/100288/how-can-i-check-the-integrity-of-a-video-file-avi-mpeg-mp4
  I tried to do this operation in asp.net and failed due to errors since my first time using ffmpeg.below is my code.I tried to save malicious software creates error in to a string.

         Process ffmpeg; 
  
         string video;
  
         string thumb="";
  
         video = Page.MapPath("") + "\\input\\error.mp4";
  
         ffmpeg = new Process();
  
         ffmpeg.StartInfo.Arguments = "-v error -i \"" + video + "\"-f null - 2> \"" + thumb + "\"";
  
         ffmpeg.StartInfo.FileName = Page.MapPath("ffmpeg//ffmpeg.exe");
  
         ffmpeg.Start(); // start !
  
         ffmpeg.StartInfo.CreateNoWindow = true;
  
         ffmpeg.WaitForExit();
  
         Label1.Text = thumb;

  please also let me know if there is any other option other than ffmpeg

• lavf/dashenc : set FLAC manifest codec string to "flac"

  14 novembre 2018, par Jan Ekström

  lavf/dashenc : set FLAC manifest codec string to "flac"
  Internally in ISOBMFF the FLAC-in-ISOBMFF draft uses "fLaC"
  
  as the identifier for FLACSampleEntry, and there seems to be no
  
  MPEG-DASH specification for the in-manifest identifier for FLAC.
  After testing the browsers' implementations, it seems like all of
  
  the major browser vendors have decided to utilize the MIME type for
  
  FLAC ("audio/flac") as the identifier. This change set leads to
  
  that string being utilized for FLAC streams instead of the sample
  
  entry identifier ("fLaC"), which is the default behavior.
  Verified by auri_ on IRC to play with the major browsers.
  

  • [DH] libavformat/dashenc.c

• How to make command string for ffmpeg in c# correctly ?

  9 octobre 2018, par Rolens Centottantaquattro

  I wrote this code for make a video from still image and audio with ffmpeg in c#.
  I wrote the argument string and inserted the variable parameters between braces.
  Trying to start the program nothing happens. Something wrong with the string or something ?

  string image = folderInput.SelectedPath + "/" + name+ ".jpg";
  
  bmp.Save(immagine);
  
  string audioMixing = folderInput.SelectedPath + "/" + name + ".wav";
  
  string videoOutput = folderOutput.SelectedPath + "/" + name + ".mp4";                   
  
  const string templateArgumentsVideo = " -loop l -i {0} -i {1} -c:v libx264 -tune stillimage c:a aac -b:a 192k -pix_fmt yuv420p -shortest {2} -y";
  
  var argumentsVideo = string.Format(templateArgumentsVideo,image,audioMixing,videoOutput);
  
  
  
  Process makeVideo = new Process();
  
  makeVideo.StartInfo.UseShellExecute = false;
  
  makeVideo.StartInfo.RedirectStandardOutput = true;
  
  makeVideo.StartInfo.CreateNoWindow = true;
  
  makeVideo.StartInfo.FileName = (Convert.ToString(Environment.CurrentDirectory)) + "\\ffmpeg.exe";
  
  makeVideo = Process.Start(makeVideo.StartInfo.FileName, argumentsVideo);
  
  makeVideo.WaitForExit();