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!7

cmodule VideoSplicer > DynPrintLog {
  S inputFile, outputFile;
  S timestamps;
  
  transient ImageSurface isPreview;
  
  visual jvsplit(northAndCenterWithMargins(
    vstackWithSpacing(
      withLabel("Input video:", filePathInputWithBrowseButton(dm_textField('inputFile))),
      withLabel("Output video:", filePathInputWithBrowseButton(dm_textField('outputFile))),
      rightAlignedLine(jbutton("Load video", rThread loadVideo))),
    jsection("Timestamps", dm_textArea('timestamps))),
      jhsplit(jsection("Preview", jscroll_center(isPreview = jImageSurface())),
      super));
    
  void loadVideo enter {
    File f = newFile(inputFile);
    if (!fileExists(f)) ret with infoBox("File not found: " + f2s(f));
    S id = md5(f2s(f));
    
    File previewFile = prepareCacheProgramFile("preview-" + id + ".jpg");
    File audioFile = prepareCacheProgramFile("preview-" + id + ".wav");
    if (!fileExists(previewFile)) {
      print("Getting preview image...");
      ffmpeg_getSingleFrame(f, previewFile, 0.0);
      print("Done");
    }
    isPreview.setImage(loadImage2(previewFile));
    if (!fileExists(audioFile)) {
      print("Extracting audio...");
      ffmpeg_toMonoAudio(f, audioFile);
      print("Done - " + fileInfo(audioFile));
    }
  }
}