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!7

cmodule VideoSplicer > DynPrintLog {
  S inputFile, outputFile;
  S timestamps;
  
  transient int audioWindowSize = 16000/10; // 10 per second
  transient ImageSurface isPreview;
  transient JAmplitudeGraph graph;
  
  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("Audio", jMinHeight(100, graph =
        setForeground(Color.red, swingNu(JAmplitudeGraph))))),
    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");
    } else print("Have preview image");
    isPreview.setImageAndZoomToDisplay(loadImage2(previewFile));

    if (!fileExists(audioFile)) {
      print("Extracting audio...");
      ffmpeg_toMonoAudio_16k(f, audioFile);
      print("Done - " + fileInfo(audioFile));
    } else print("Have audio");
    
    print("Getting volume profile...");
    float[] profile = decodeWAVToMonoSamples_floatVolumeProfile(audioFile, audioWindowSize);
    print("Have volume profile (" + nEntries(l(profile)) + ")");
    printStruct(takeFirstOfFloatArray(100, profile));
    
    graph.setValues(profile);
  }
}