Method openFileAndFindVideoStream

YUViewLib/src/filesource/FileSourceFFmpegFile.cpp:474–544

}

void FileSourceFFmpegFile::openFileAndFindVideoStream(QString fileName)
{
  this->isFileOpened = false;

  this->ff.loadFFmpegLibraries();
  if (!this->ff.loadingSuccessfull())
    return;

  // Open the input file
  if (!this->ff.openInput(this->formatCtx, fileName))
    return;

  this->formatCtx.getInputFormat();

  for (unsigned idx = 0; idx < this->formatCtx.getNbStreams(); idx++)
  {
    auto stream     = this->formatCtx.getStream(idx);
    auto streamType = stream.getCodecType();
    auto codeID     = this->ff.getCodecIDWrapper(stream.getCodecID());
    if (streamType == AVMEDIA_TYPE_VIDEO)
    {
      this->video_stream        = stream;
      this->streamIndices.video = idx;
    }
    else if (streamType == AVMEDIA_TYPE_AUDIO)
      this->streamIndices.audio.append(idx);
    else if (streamType == AVMEDIA_TYPE_SUBTITLE)
    {
      if (codeID.getCodecName() == "dvb_subtitle")
        this->streamIndices.subtitle.dvb.append(idx);
      else if (codeID.getCodecName() == "eia_608")
        this->streamIndices.subtitle.eia608.append(idx);
      else
        this->streamIndices.subtitle.other.append(idx);
    }
  }
  if (!this->video_stream)
    return;

  this->currentPacket = this->ff.allocatePacket();

  // Get the frame rate, picture size and color conversion mode
  auto avgFrameRate = this->video_stream.getAvgFrameRate();
  if (avgFrameRate.den == 0)
    this->frameRate = -1.0;
  else
    this->frameRate = avgFrameRate.num / double(avgFrameRate.den);

  const auto ffmpegPixFormat =
      this->ff.getAvPixFmtDescriptionFromAvPixelFormat(this->video_stream.getPixelFormat());
  this->rawFormat = ffmpegPixFormat.getRawFormat();
  if (this->rawFormat == video::RawFormat::YUV)
    this->pixelFormat_yuv = ffmpegPixFormat.getPixelFormatYUV();
  else if (this->rawFormat == video::RawFormat::RGB)
    this->pixelFormat_rgb = ffmpegPixFormat.getRGBPixelFormat();

  this->duration = this->formatCtx.getDuration();
  this->timeBase = this->video_stream.getTimeBase();