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• Enable Subtitle on FFmpeg Stream

  14 janvier 2020, par A Person

  I am trying to enable subtitle on my streams.

  The problem is that I do not have a subtitle track.

  The original IP stream that is coming has subtitles and I need to know how to enable it.

  I have looked at Set a subtitle language using ffmpeg

  and also read that I need to assign some sort of PID to the FFmpeg tag to enable it. However, I have been googling this and cannot seem to dins it.

  My code is :

  /c ffmpeg -hwaccel cuvid -y -i {udp} -vf "drawtext=fontfile={font}: fontsize=25:text='{ChannelName} %{localtime}': x=10: y=10: fontcolor=white: box=1: boxcolor=0x000000" -pix_fmt yuv420p -vsync 1 -crf 10 -c:v h264_nvenc -r 25 -threads 0  -b:v 1M -profile:v main -minrate 1M -maxrate 1M -bufsize 10M -sc_threshold 0 -c:a aac -b:a 128k -ac 2 -ar 44100 -af "aresample=async=1:min_hard_comp=0.100000:first_pts=0" -bsf:v h264_mp4toannexb -t 00:31:00 {output}\{ChannelName}_{year}_{monthno}_{day}__{Hours}_{Minutes}_{Seconds}.mp4 {FFLog}

  These are the variables :

  {udp} this is the UDP link e.g udp ://239...*:1234

  {font} this just points to the font file

  {ChannelName} holds the name of the stream

  {localtime} current time

  {FLOG} path to a log file to dumb the data

• Combining audio and video in C# [on hold]

  1er décembre 2016, par Jay Malhotra

  Disclaimer : I know this question has already been asked but it is library-based and most of the answers I can see are 5+ years old or more, and usually refer to similarly old libraries.

  Basically, I have a video from youtube-dl (the library) and a video with audio on it (I would also like to know if there’s a way to just download the audio from a video using youtube-dl or another library).

  Anyway, I want to replace the audio of the video with the audio from the second video. Apparently this can be done with ffmpeg commands but I want to use NuGet because I’m at school and I don’t have the ability to install traditional software.

  Is there a library that can help me do this ?

• ffmpeg annotation not working

  26 décembre 2017, par ayyanar pms

  Im using ffmpeg in php to annotate text in video,

  using binaries,

     ffmpeg.exe
  
     ffplay.exe
  
     ffprobe.exe

  im using like this,

  $ip = dirname(__FILE__)."/input.mp4";
  
  $font = dirname(__FILE__)."/arial.ttf";
  
  $op = dirname(__FILE__)."/output.mp4";
  
  $text = "stack overflow";
  
  
  
  $process = exec("ffmpeg -i $ip -vf drawtext='$font': \text=$text: fontcolor=white: fontsize=24: box=1: boxcolor=black@0.5: \boxborderw=5: x=(w-text_w)/2: y=(h-text_h)/2 -codec:a copy $op");

  This is not working, when i use same in cmd its working, whether its path issue ? please guide me.