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• Text in ass subtitles is displayed smaller then should

  3 septembre 2024, par Armen Sanoyan

  I add subtitles to video by ffmpeg using two different ways. The first way is by using drawtext command and this way everything works perfectly. Here is the command

  


  ffmpeg -i ./input.mp4 -vf "drawtext=text='reise':fontfile=../fonts/Audiowide-Regular.ttf:fontsize=55:fontcolor=white:x=0:y=683" -codec:a copy ./output.mp4


  


  The second way is by using ass subtitles file. This way I got smaller letters and wrong y position for text. Below is the ass subtitle file content

  


  
[Script Info]
Title: Advanced Highlighted Subtitle Example
ScriptType: v4.00+
WrapStyle: 0
PlayResX: 1048
PlayResY: 750

[V4+ Styles]
Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
Style: Default,Audiowide Regular,55,&HFFFFFF,&H00FFFFFF,&H00000000,&H00000000,1,0,0,0,100,100,0,0,0,0,0,2,10,10,10,1

[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text

Dialogue: 0,00:00:0.00,00:00:2.38,Default,,0,0,0,,{\pos(0,683)\an4}reise


  


  And command for second approach

  


  ffmpeg -i ./input.mp4 -vf "ass=../subtitles.ass:fontsdir=../fonts/Audiowide-Regular.ttf"  ../output.mp4


  


  So they both get the same video, same font and same text. The problem is that in case of using ass file the text is much smaller and dislocated

  


  The numbers on axis indicate sizes by pixels.
As you can see in second image it's much smaller and has wrong y coordinate. It seems like it has wrong scaling numbers. What is wrong with my ass file configs ?

  


  I have tried solution from [universalmediaserver]to remove PlayResX/Y, but it doesn't work. (https://www.universalmediaserver.com/forum/viewtopic.php?t=5907). I also tried to measure the text width in many other ways(like in html rendered in browser, canvas...), so I'm pretty sure that drawtext does give correctly rendered width. The problem is related to ass subtitles file. Also if I use popular fonts like Arial the deviation is much less.

  


• Error adding text on video using ffmpeg

  7 mars 2018, par robert tamunoemi

  Am trying to add text on video using ffmpeg. Everything works well if there is no spacing in the words. Here is my code

  $text = "Robert Tamunoemi";
  
  $cmd = 'ffmpeg -i '.$videoPath.'  -vcodec libx264 -f mp4 -vf drawtext="fontfile=fonts/futura-normal.ttf:text="'.$text.'":fontcolor=black@1.0:fontsize=14:x=00: y=40" -preset medium  videos/birds.mp4';
  
  
  
  shell_exec($cmd.' 2> log.txt');

  Here is the output from ffmpeg log

  ffmpeg version N-89674-g57d0c24132 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 7.2.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-amf --enable-cuda --enable-cuvid --enable-d3d11va --enable-nvenc --enable-dxva2 --enable-avisynth --enable-libmfx
  
    libavutil      56.  7.100 / 56.  7.100
  
    libavcodec     58.  9.100 / 58.  9.100
  
    libavformat    58.  3.100 / 58.  3.100
  
    libavdevice    58.  0.100 / 58.  0.100
  
    libavfilter     7.  8.100 /  7.  8.100
  
    libswscale      5.  0.101 /  5.  0.101
  
    libswresample   3.  0.101 /  3.  0.101
  
    libpostproc    55.  0.100 / 55.  0.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'videos/pest11.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf58.3.100
  
    Duration: 00:00:18.20, start: 0.000000, bitrate: 223 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x584 [SAR 1:1 DAR 160:73], 83 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 132 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
  Tamunoemi:fontcolor=black@1.0:fontsize=14:x=00: y=40: Protocol not found

• Concatenation error : Cannot concatenate media using NReco Video Converter for .NET (C#)

  10 septembre 2016, par rocketmail

  I want to concatenate two videos into one using Video Converter for .NET (C#) FFMpeg wrapper
  but I have got "cannot concatenate media" exception.. am i missing something or not..
  Here is my Source Code :

   var ffMpeg = new NReco.VideoConverter.FFMpegConverter();
  
      NReco.VideoConverter.ConcatSettings set = new NReco.VideoConverter.ConcatSettings();
  
  
  
      string videoRootPath = @"E:\Sam\Recording Feature\WebApplication2\WebApplication2\Video\";
  
      string tobename = "test";
  
  
  
      string[] _fileNames = { @"E:\Sam\Recording Feature\WebApplication2\WebApplication2\Video\1.mov",
  
                                          @"E:\Sam\Recording Feature\WebApplication2\WebApplication2\Video\2.mov"};
  
  
  
      ffMpeg.ConcatMedia(_fileNames, videoRootPath + tobename + ".mov", NReco.VideoConverter.Format.mov, set);

  Please Help