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• Image edited and saved in C# can not be read by ffmpeg

  13 juillet 2017, par mmijic

  I have template image (template.jpg) on which I draw some text (13.07.2017.) and than I save it to another location (temp/intro.jpg).

  Than I want to convert that and some other images into video with ffmpeg.

  If I run command

  ffmpeg.exe -f concat -safe 0 -i input.txt -c:v libx264 -vf "fps=25,format=yuv420p" out.mp4

  Those images gets concentrated into one video file. Problem is that this image edited through C# is black in final video.

  If I for example open that C# created image in Adobe Fireworks and just save it (CTRL+S) without changing anything, and re run ffmpeg command everything is fine.

  This is code which I use to add text to template image

  //INTRO IMAGE CREATION
  
  Bitmap image = new Bitmap(1280, 720);
  
  image.SetResolution(image.HorizontalResolution, image.VerticalResolution);
  
  Graphics g = Graphics.FromImage(image);
  
  g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
  
  g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
  
  g.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.HighQuality;
  
  g.TextRenderingHint = TextRenderingHint.AntiAliasGridFit;
  
  StringFormat format = new StringFormat()
  
  {
  
      Alignment = StringAlignment.Near,
  
      LineAlignment = StringAlignment.Near
  
  };
  
  
  
  //template
  
  Bitmap back = new Bitmap(Application.StartupPath + @"\Templates\template.jpg");
  
  g.DrawImage(back, 0, 0, image.Width, image.Height);
  
  
  
  //date
  
  string Date = dateIntro.Value.ToString("dd.MM.yyyy.");
  
  var brush = new SolidBrush(Color.FromArgb(255, 206, 33, 39));
  
  Font font = new Font("Ubuntu", 97, FontStyle.Bold, GraphicsUnit.Pixel);
  
  float x = 617;
  
  float y = 530;
  
  
  
  g.DrawString(Date, font, brush, x, y, format);
  
  g.Flush();
  
  image.Save(Application.StartupPath + @"\temp\intro.jpg", ImageFormat.Jpeg);
  
  image.Dispose();

  Image created this way can be opened and viewed in any program except converted to video with ffmpeg.

  Is there anything I’m missing while adding text and saving image in C# ?

• ffmpeg error converting video to images after 31 frames

  13 juillet 2017, par David Parks

  Converting an mjpeg file to individual frames of JPEG, ffmpeg successfully outputs 31 frames of video and then stops on the error seen below.

  Notably, if I switch to a PNG file extension, I see the same messages below, but it continues to produce all frames of output successfully. However, the size of the PNG is 20x larger than the JPEG.

  Running command :

  ffmpeg -i ${f} -vsync 0 -start_number 0 frame

  Error :

  [mjpeg @ 0x189b2a0] overread 8
  
  [mjpeg @ 0x189b2a0] EOI missing, emulating
  
  [mjpeg @ 0x189a280] Invalid pts (59) <= last (59).78 bitrate=N/A    
  
  Video encoding failed
  
  Conversion failed!

  Full output :

  $ ffmpeg -i ${f} -vsync 0 -start_number 0 frame
  
  %07d.jpeg
  
  ffmpeg version 2.8.11-0ubuntu0.16.04.1 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
  
    configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
  
    WARNING: library configuration mismatch
  
    avcodec     configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv --enable-version3 --disable-doc --disable-programs --disable-avdevice --disable-avfilter --disable-avformat --disable-avresample --disable-postproc --disable-swscale --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libvo_aacenc --enable-libvo_amrwbenc
  
    libavutil      54. 31.100 / 54. 31.100
  
    libavcodec     56. 60.100 / 56. 60.100
  
    libavformat    56. 40.101 / 56. 40.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 40.101 /  5. 40.101
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  2.101 /  1.  2.101
  
    libpostproc    53.  3.100 / 53.  3.100
  
  [mjpeg @ 0x1894260] Changeing bps to 8
  
  [mjpeg @ 0x1894260] overread 8
  
  [mjpeg @ 0x1894260] EOI missing, emulating
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '../user_1_date_2017-07-12--08-39-22_action_HEAD_LR_objfrom_6_objto_6_cam_5.mov':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 512
  
      compatible_brands: qt  
  
      encoder         : Lavf57.63.100
  
    Duration: 00:00:16.67, start: 0.000000, bitrate: 80142 kb/s
  
      Stream #0:0(eng): Video: mjpeg (jpeg / 0x6765706A), yuvj422p(pc, bt470bg/unknown/unknown), 1920x1080, 80139 kb/s, 30.24 fps, 59.94 tbr, 1000k tbn, 1000k tbc (default)
  
      Metadata:
  
        handler_name    : DataHandler
  
  Output #0, image2, to 'frame%07d.jpeg':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 512
  
      compatible_brands: qt  
  
      encoder         : Lavf56.40.101
  
      Stream #0:0(eng): Video: mjpeg, yuvj422p(pc), 1920x1080, q=2-31, 200 kb/s, 59.94 fps, 59.94 tbn, 59.94 tbc (default)
  
      Metadata:
  
        handler_name    : DataHandler
  
        encoder         : Lavc56.60.100 mjpeg
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mjpeg (native) -> mjpeg (native))
  
  Press [q] to stop, [?] for help
  
  [mjpeg @ 0x189b2a0] overread 8
  
  [mjpeg @ 0x189b2a0] EOI missing, emulating
  
  [mjpeg @ 0x189a280] Invalid pts (59) <= last (59).78 bitrate=N/A    
  
  Video encoding failed
  
  Conversion failed!

• ffmpeg - improving quality

  14 juillet 2017, par jdjmedia

  My current CMS uses ffmpeg to encode videos. The source is MP4 and output is MP4. Here is the current line it uses :

  [2017-07-13 09:00:11] Executing : export
  FFMPEG_DATADIR=/home/httpd/html/domain.com/public_html/cms_admin//includes/presets/ ; /usr/local/bin/ffmpeg -y -i
  "/home/httpd/html/domain.com/public_html/cms_admin//storage//J80KTXaG4aE8FLHF0NZVUDB7PDMR487Q.mp4"
  -i "/home/httpd/html/members.domain.com/public_html/content/upload/scene/1080p/hys_katya.mp4"
  -i "/home/httpd/html/domain.com/public_html/cms_admin//storage//CZ6JY641aXDYCLNC7UTBMMCJRFXABJ6U.mp4"
  -filter_complex ’[0:0] [0:1] [1:0] [1:1] [2:0] [2:1] concat=n=3:v=1:a=1 [v] [a]’ -map ’[v]’ -map ’[a]’ -sn -b:v 12000k
  -vcodec h264 -pix_fmt yuv420p -r 30 -acodec aac -strict experimental -ab 127k -ar 44100 -ac 2 -dn -vpre hq -movflags faststart -s 1920x1080 -aspect 16:9 -f mp4 -vprofile high

  I have noticed that the quality it not that great. Any recommendations on what flags I might be able to use to make the output higher quality ?