{
  "OTIO_SCHEMA": "Timeline.1",
  "name": "multi_track",
  "metadata": {"muse.project_key": "multi_track"},
  "tracks": {
    "OTIO_SCHEMA": "Stack.1",
    "name": "tracks",
    "children": [
      {
        "OTIO_SCHEMA": "Track.1",
        "kind": "Video",
        "name": "V1",
        "children": [
          {
            "OTIO_SCHEMA": "Clip.2",
            "name": "v1_clip",
            "media_reference": {
              "OTIO_SCHEMA": "ExternalReference.1",
              "target_url": "media/v1.mov",
              "metadata": {}
            },
            "source_range": {
              "OTIO_SCHEMA": "TimeRange.1",
              "start_time": {"OTIO_SCHEMA": "RationalTime.1", "rate": 24, "value": 0},
              "duration": {"OTIO_SCHEMA": "RationalTime.1", "rate": 24, "value": 48}
            },
            "effects": [
              {
                "OTIO_SCHEMA": "Effect.1",
                "name": "speed",
                "effect_name": "LinearTimeWarp",
                "parameters": {"factor": "2.0"},
                "keyframes": [
                  {
                    "time": {"OTIO_SCHEMA": "RationalTime.1", "rate": 24, "value": 0},
                    "value": 1.0,
                    "interpolation": "linear"
                  },
                  {
                    "time": {"OTIO_SCHEMA": "RationalTime.1", "rate": 24, "value": 24},
                    "value": 2.0,
                    "interpolation": "hold"
                  }
                ],
                "metadata": {}
              }
            ],
            "markers": [
              {
                "OTIO_SCHEMA": "Marker.2",
                "name": "v1_marker",
                "marked_range": {
                  "OTIO_SCHEMA": "TimeRange.1",
                  "start_time": {"OTIO_SCHEMA": "RationalTime.1", "rate": 24, "value": 12},
                  "duration": {"OTIO_SCHEMA": "RationalTime.1", "rate": 24, "value": 1}
                },
                "color": "RED",
                "comment": "note",
                "metadata": {}
              }
            ],
            "metadata": {}
          },
          {
            "OTIO_SCHEMA": "Transition.1",
            "name": "dissolve",
            "transition_type": "SMPTE_Dissolve",
            "in_offset": {"OTIO_SCHEMA": "RationalTime.1", "rate": 24, "value": 12},
            "out_offset": {"OTIO_SCHEMA": "RationalTime.1", "rate": 24, "value": 12},
            "metadata": {}
          },
          {
            "OTIO_SCHEMA": "Clip.2",
            "name": "nested_clip",
            "media_reference": {
              "OTIO_SCHEMA": "ExternalReference.1",
              "target_url": "media/nested_ref.mov",
              "metadata": {}
            },
            "source_range": {
              "OTIO_SCHEMA": "TimeRange.1",
              "start_time": {"OTIO_SCHEMA": "RationalTime.1", "rate": 24, "value": 0},
              "duration": {"OTIO_SCHEMA": "RationalTime.1", "rate": 24, "value": 24}
            },
            "active_media_reference_key": "NESTED_SEQ",
            "effects": [],
            "markers": [],
            "metadata": {"nested_sequence_id": "nested_seq_0"}
          }
        ]
      },
      {
        "OTIO_SCHEMA": "Track.1",
        "kind": "Video",
        "name": "V2",
        "children": [
          {
            "OTIO_SCHEMA": "Clip.2",
            "name": "v2_clip",
            "media_reference": {
              "OTIO_SCHEMA": "ExternalReference.1",
              "target_url": "media/v2.mov",
              "metadata": {}
            },
            "source_range": {
              "OTIO_SCHEMA": "TimeRange.1",
              "start_time": {"OTIO_SCHEMA": "RationalTime.1", "rate": 24, "value": 0},
              "duration": {"OTIO_SCHEMA": "RationalTime.1", "rate": 24, "value": 24}
            },
            "effects": [],
            "markers": [],
            "metadata": {}
          }
        ]
      },
      {
        "OTIO_SCHEMA": "Track.1",
        "kind": "Audio",
        "name": "A1",
        "metadata": {"sample_rate": "48000"},
        "children": [
          {
            "OTIO_SCHEMA": "Clip.2",
            "name": "a1_clip",
            "media_reference": {
              "OTIO_SCHEMA": "ExternalReference.1",
              "target_url": "media/a1.wav",
              "metadata": {}
            },
            "source_range": {
              "OTIO_SCHEMA": "TimeRange.1",
              "start_time": {"OTIO_SCHEMA": "RationalTime.1", "rate": 24, "value": 0},
              "duration": {"OTIO_SCHEMA": "RationalTime.1", "rate": 24, "value": 48}
            },
            "effects": [],
            "markers": [],
            "metadata": {}
          }
        ]
      },
      {
        "OTIO_SCHEMA": "Track.1",
        "kind": "Subtitle",
        "name": "S1",
        "children": [],
        "metadata": {
          "captions": [
            {
              "text": "Hello world",
              "marked_range": {
                "OTIO_SCHEMA": "TimeRange.1",
                "start_time": {"OTIO_SCHEMA": "RationalTime.1", "rate": 24, "value": 0},
                "duration": {"OTIO_SCHEMA": "RationalTime.1", "rate": 24, "value": 48}
              },
              "style": "default",
              "metadata": {}
            }
          ]
        }
      }
    ]
  },
  "markers": [
    {
      "OTIO_SCHEMA": "Marker.2",
      "name": "seq_marker",
      "marked_range": {
        "OTIO_SCHEMA": "TimeRange.1",
        "start_time": {"OTIO_SCHEMA": "RationalTime.1", "rate": 24, "value": 0},
        "duration": {"OTIO_SCHEMA": "RationalTime.1", "rate": 24, "value": 1}
      },
      "color": "GREEN",
      "comment": "start",
      "metadata": {}
    }
  ]
}