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• FFMPEG errors with non-English characters

  1er avril 2021, par Mingli Yang

  When I tried to use the command-line to catch a chrome window with non-English characters such as ¥, or any other 中文页面, an I/O error will occur with the message "Can't find window "¥中文页面。 - Google Chrome", aborting." When the non-English characters are replaced by English ones, the errors will disappear. Environment : Windows 10, ffmpeg version 2021-03-24

  


  This works fine :
ffmpeg -f gdigrab -i title="$ English Page - Google Chrome" -pix_fmt yuv420p grab.mp4

  


  This has errors :
ffmpeg -f gdigrab -i title="¥中文页面。 - Google Chrome" -pix_fmt yuv420p grab.mp4

  


  "Can't find window "¥中文页面。 - Google Chrome", aborting."

  


  Any ideas to solve this ?

  


• Embed SDL_Overlay on QWidget/QLabel

  29 décembre 2014, par Ashish

  I am new on SDL and FFmpeg API framework. I am trying to run video file using FFmpeg and SDL framework. In this, i am extracting frame from video files and then using this

       SDL_DisplayYUVOverlay(SDL_Overlay* overlay,SDL_Rect *rect);

  playing my video files as a player. Here my problem is SDL creates its own window for playing videos but i want to display those frames on my own Qt GUI. I want to embed that SDL Window on my Qt application. If anyone knows anything about this, please help me out of this problem. Your help will really appreciate.
  Thanks.

• LAME Encoder Node.js MP3 streaming

  27 octobre 2015, par yigames

  currently my code decodes MP3 files to PCM and then encodes output to whatever format is required ’MP3’ or ’other’, its using Node and FFMPEG for this currently. i want to use LAME to do the MP3 conversion encode and leave FFMEG for other formats but not sure how to go about with it. my relevant code currently :
  var createOutput = function(key)

  var encoderArgs = [];
  
  var encoder;
  
  
  
  if (outputs[key].format === 'mp3') {
  
  
  
      //encoder settings
  
      encoderArgs.push('-acodec', 'pcm_s16le');
  
      ..
  
      encoderArgs.push('-strict', '-2');
  
  
  
  
  
  } else if (outputs[key].format === 'SOME OTHER FORMAT') {
  
  
  
      //encoder settings
  
      encoderArgs.push('-acodec', 'pcm_s16le');
  
      ..
  
      encoderArgs.push('-strict', '-2');
  
  
  
  } else {
  
  
  
      return;
  
  
  
  }
  
  
  
  var encoder = child_process.spawn(serverOpts.converterPath, encoderArgs);
  
  encoderArgs = null;
  
  
  
  
  
  //handles any errors and resumes
  
  encoder.once('error', function(err) { });
  
  encoder.stdin.once('error', function(err) { });
  
  encoder.stdout.once('error', function(err) { });
  
  encoder.stderr.once('error', function(err) { });
  
  encoder.stderr.resume();
  
  
  
  //when data received in the standard in stream
  
  inStream[key].on('data', function (chunk) {
  
  
  
      if (encoder.stdin.writable && !encoder.stdin._writableState.length) {
  
  
  
          encoder.stdin.write(chunk);
  
  
  
      }
  
  
  
  });
  
  
  
  //setup data listener
  
  //when 'data' received on standard out stream
  
  encoder.stdout.on('data', function (chunk) {
  
  
  
      historyBuffer[key].write(chunk);
  
      outStream[key].write(chunk);
  
  
  
  });
  
  
  
  encoder.once('close', function() {
  
  
  
      encoder.removeAllListeners();
  
      encoder.stdin.removeAllListeners();
  
      encoder.stderr.removeAllListeners();
  
      encoder.stdout.removeAllListeners();
  
      inStream[key].removeAllListeners();
  
  
  
      encoder = null;
  
  
  
      process.nextTick(function() {
  
  
  
          createOutput(key);
  
  
  
      });
  
  
  
  });

  i have tried to ’pipe’ inStream[key] to encoder to historyBuffer[key] and outStream[key] but it does not work. can someone point me in the right direction please ?