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• avformat/mxfdec : fixed jp2k_rsiz and 170M matrix

  6 juin 2021, par Valerii Zapodovnikov

  avformat/mxfdec : fixed jp2k_rsiz and 170M matrix
  Again. 240M matrix is different from BT.601 ! And 170M is the same
  
  as BT.601. It is primaries that are the same in 240M and 170M, as
  
  for jp2k_rsiz see page 17 of ST 422:2019. IT WAS THERE since 2006.
  
  This wrong jp2k_rsiz is a copy-paste of header_open_partition_key.
  

  • [DH] libavformat/mxf.c
  • [DH] libavformat/mxfdec.c

• avfilter/vf_fps : extend support for expressions

  24 février 2021, par James Almer

  avfilter/vf_fps : extend support for expressions
  AV_OPT_TYPE_VIDEO_RATE AVOption types are parsed as expressions, but in a
  
  limited way. For example, name constants can only be parsed alone and not as
  
  part of a longer expression.
  This change allows usage like
  ffmpeg -i IN -vf fps="if(eq(source_fps\,film)\,ntsc_film\,source_fps)" OUT
  Suggested-by : ffmpeg@fb.com
  
  Signed-off-by : James Almer <jamrial@gmail.com>
  

  • [DH] libavfilter/vf_fps.c

• Large Video file Conversion using ffmpeg

  12 mai 2021, par Varsha

  I am using ffmpeg tool to convert videos from wmv to mp4 formats using the following code -

  


          string outputPath = args[1].ToString();
        string[] files = Directory.GetFiles(inputPath);               
        Console.WriteLine(files.Length);
        foreach (var item in files)
        {
            itemBkp = item;                                       
            Process proc = new Process();
            proc.StartInfo.FileName = @"e:\test\ffmpeg.exe";                   
            string filename= Path.GetFileName(item);                    
            proc.StartInfo.Arguments=  " -i "  + item + " " + outputPath + filename.Split('.')[0] + ".mp4";
            proc.StartInfo.UseShellExecute = false;
            proc.StartInfo.RedirectStandardInput = true;
            proc.StartInfo.RedirectStandardOutput = true;
            proc.Start();
            proc.WaitForExit();
        }


  


  It works fine for videos up to 20mb but when i try for videos above 70mb it throws following error -

  


  FFmpeg version SVN-r6179, Copyright (c) 2000-2004 Fabrice Bellard configuration : —extra-cflags=-I/static/include —extra-ldflags=-L/static/lib —enable-memalign-hack —enable-mp3lame —enable-xvid —enable-a52 —enable-libogg —enable-vorbis —enable-faac —enable-faad —enable-x264 —enable-pp —enable-amr_wb —enable-amr_nb —enable-avisynth —enable-gpl libavutil version : 49.0.0 libavcodec version : 51.13.0 libavformat version : 50.5.0 built on Sep 5 2006 22:41:30, gcc : 3.4.5 (mingw special) E :\videos\Playful : I/O error occured Usually that means that input file is truncated and/or corrupted.

  


  Is there a limit on video size to be converted ?