Method scanBitstream

YUViewLib/src/filesource/FileSourceFFmpegFile.cpp:420–472

}

bool FileSourceFFmpegFile::scanBitstream(QWidget *mainWindow)
{
  if (!this->isFileOpened)
    return false;

  // Create the dialog (if the given pointer is not null)
  auto maxPTS = this->getMaxTS();
  // Updating the dialog (setValue) is quite slow. Only do this if the percent value changes.
  int                             curPercentValue = 0;
  QScopedPointer<QProgressDialog> progress;
  if (mainWindow != nullptr)
  {
    progress.reset(
        new QProgressDialog("Parsing (indexing) bitstream...", "Cancel", 0, 100, mainWindow));
    progress->setMinimumDuration(1000); // Show after 1s
    progress->setAutoClose(false);
    progress->setAutoReset(false);
    progress->setWindowModality(Qt::WindowModal);
  }

  this->nrFrames = 0;
  while (this->goToNextPacket(true))
  {
    DEBUG_FFMPEG("FileSourceFFmpegFile::scanBitstream: frame %d pts %d dts %d%s",
                 this->nrFrames,
                 (int)this->currentPacket.getPTS(),
                 (int)this->currentPacket.getDTS(),
                 this->currentPacket.getFlagKeyframe() ? " - keyframe" : "");

    if (this->currentPacket.getFlagKeyframe())
      this->keyFrameList.append(pictureIdx(this->nrFrames, this->currentPacket.getDTS()));

    if (progress && progress->wasCanceled())
      return false;

    int newPercentValue = 0;
    if (maxPTS != 0)
      newPercentValue = functions::clip(int(this->currentPacket.getPTS() * 100 / maxPTS), 0, 100);
    if (newPercentValue != curPercentValue)
    {
      if (progress)
        progress->setValue(newPercentValue);
      curPercentValue = newPercentValue;
    }

    this->nrFrames++;
  }

  DEBUG_FFMPEG("FileSourceFFmpegFile::scanBitstream: Scan done. Found %d frames and %d keyframes.",
               this->nrFrames,
               this->keyFrameList.length());
  return !progress->wasCanceled();
}

void FileSourceFFmpegFile::openFileAndFindVideoStream(QString fileName)
{