gum_picture.html [180:226]:
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          audio.play();
        } else if (picture_status) {
          content.appendChild(picture);
          picture.src = window.URL.createObjectURL(stream);
          picture.onload = function(e) {
            window.URL.revokeObjectURL(this.src);
          }
        }
      }, function(err) {
        message.innerHTML = "<p class='error'>" + err + "</p>";
        stopMedia();
      });
    } catch(e) {
      message.innerHTML = "<p class='error'>" + e + "</p>";
      stopMedia();
    }
  }

  function startSnapshot() {
    capturing = !capturing;
    if (capturing) {
      captureImage();
      snapshot.value = "Stop Snapshot";
    } else {
      snapshot.value = "Snapshot";
    }
  }

  function captureImage() {
    if (video_status && capturing) {
      //dump("Capturing len " + snapshots.length + "\n");
      var canvas = document.createElement('canvas');
      var ctx = canvas.getContext('2d');

      canvas.width  = video.videoWidth/4;
      canvas.height = video.videoHeight/4;
      ctx.drawImage(video, 0, 0, canvas.width, canvas.height);
      if (snapshots.unshift(canvas) > 4)
        snapshots.length = 4;
      frames.innerHTML = '';
      for(var i=0; i<snapshots.length; i++) {
        frames.appendChild(snapshots[i]);
      }

      setTimeout(captureImage, 2000);
    }
  }
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gum_test_aec.html [213:259]:
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          audio.play();
        } else if (picture_status) {
          content.appendChild(picture);
          picture.src = window.URL.createObjectURL(stream);
          picture.onload = function(e) {
            window.URL.revokeObjectURL(this.src);
          }
        }
      }, function(err) {
        message.innerHTML = "<p class='error'>" + err + "</p>";
        stopMedia();
      });
    } catch(e) {
      message.innerHTML = "<p class='error'>" + e + "</p>";
      stopMedia();
    }
  }

  function startSnapshot() {
    capturing = !capturing;
    if (capturing) {
      captureImage();
      snapshot.value = "Stop Snapshot";
    } else {
      snapshot.value = "Snapshot";
    }
  }

  function captureImage() {
    if (video_status && capturing) {
      //dump("Capturing len " + snapshots.length + "\n");
      var canvas = document.createElement('canvas');
      var ctx = canvas.getContext('2d');

      canvas.width  = video.videoWidth/4;
      canvas.height = video.videoHeight/4;
      ctx.drawImage(video, 0, 0, canvas.width, canvas.height);
      if (snapshots.unshift(canvas) > 4)
        snapshots.length = 4;
      frames.innerHTML = '';
      for(var i=0; i<snapshots.length; i++) {
        frames.appendChild(snapshots[i]);
      }

      setTimeout(captureImage, 2000);
    }
  }
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