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• FFmpeg transcoding stretches Vertically recorded videos

  28 juin 2017, par oteamm

  Hi I am having an issue with the Transcoder (FFmpeg) .

  Problem Details :
  Vertically recorded videos are appearing stretched (widened) upon transcode.

  For videos which are recorded vertically (height is more than width), the transcoded video generated does shrink vertically. If we change the aspect ratio for such files it will ruin the other video transcodes for which the transcode is generating correctly.

  Expected Behaviour :
  should not shrink/stretch vertically recorded videos

  Impact :
  we are seeing a distorted version of video, stretched horizontally

  Notes :
  Version of FFmpeg Software that you’re is used : - ffmpeg-2.8.6-win64
  (default Settings used)

  Request :
  Need to a way to correct this as if we change the aspect ratio for such files it will ruin the other video proxies for which the proxy is generating correctly.
  Please suggest, if there is any way to AUTO select the aspect ratio of original file and generate transcode accordingly. Thanks !

• avcodec/hevcdec : constrained intra predict, do not check top left IS_INTRA if it...

  16 octobre 2020, par Xu Guangxin

  avcodec/hevcdec : constrained intra predict, do not check top left IS_INTRA if it's not available
  fix ticket : 8932
  For poc 2, we have tile boundary at x = 640.
  
  When we predict cu(640,912),the top left pixel is not avaliable to the cu.
  
  So, we can not check it's intra or not. We need set top[-1] = top[0] directly.
  
  see 8.4.4.2.1 for details
  Signed-off-by : Xu Guangxin <oddstone@gmail.com>
  
  Signed-off-by : Linjie Fu <linjie.justin.fu@gmail.com>
  

  • [DH] libavcodec/hevcpred_template.c

• C# ffmpeg not working

  24 février 2018, par ViVi

  I am trying to convert an mp3 file into a flac file using ffmpeg for c#.
  I downloaded the ffmpeg.exe and placed it inside the bin/debug folder of my project.

  My input folder is testmp3 and output folder is testmp3OUTPUT. These folders are located within the debug folder itself. testmp3 folder got mp3 files.

  This is the code I am using :

  string inputfile = @"..\\testmp3\\349.mp3";
  
  string outputfile = @"..\\testmp3OUTPUT\\349.flac";
  
  Process myProcess = new Process();
  
  ProcessStartInfo p = new ProcessStartInfo();
  
  string sArgs = string.Format(" -i {0} -f wav - | neroAacEnc -ignorelength -q 0.5 -if - -of {1}", inputfile, outputfile);
  
  p.FileName = "ffmpeg.exe";
  
  p.CreateNoWindow = true;
  
  p.RedirectStandardOutput = true;
  
  //p.WindowStyle = ProcessWindowStyle.Normal
  
  p.UseShellExecute = false;
  
  p.Arguments = sArgs;
  
  myProcess.StartInfo = p;
  
  myProcess.Start();
  
  myProcess.WaitForExit();
  
  //Write details about call 
  
  myProcess.StandardOutput.ReadToEnd();