VAST Video Ad Duration

How our VAST tester tests video ad duration

Our VAST tester evaluates video ad duration by analyzing the duration metadata included in the VAST tags. When a VAST tag is submitted for testing, the tool extracts the duration information and uses it to simulate ad playback. This process involves:

1. Parsing the VAST XML: The tester parses the VAST XML to locate the duration metadata, which is typically specified in the <Duration> tag.

2. Simulating Ad Playback: The tool simulates ad playback using the extracted duration information. This simulation helps identify any discrepancies between the expected and actual ad duration.

3. Tracking Playback Events: During the simulation, the tester tracks key playback events (e.g., start, pause, complete) to gather data on how the ad behaves over time.

4. Generating Reports: After the test is complete, the tool generates a report that highlights any issues related to ad duration, such as mismatches between the expected and actual duration or missing duration metadata altogether.

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Optimization Strategies

To optimize the testing of VAST video ad durations, consider the following strategies:

1. Use Accurate Duration Metadata: Ensure that the VAST tags you are testing include accurate duration metadata. This information is crucial for proper ad playback and tracking.

2. Test Across Different Environments: VAST video ads may behave differently across various environments (e.g., desktop, mobile, different browsers). Conduct thorough testing in all relevant environments to identify any discrepancies.

3. Monitor Playback Events: Implement tracking for key playback events (e.g., start, pause, complete) to gather data on how users interact with your video ads. This information can help you identify potential issues with ad duration.

4. Utilize Video Analytics Tools: Leverage video analytics tools to gain insights into ad performance, including duration-related metrics. These tools can help you identify trends and optimize your VAST tags accordingly.

5. Conduct User Testing: Gather feedback from real users to understand their experiences with your VAST video ads. This feedback can provide valuable insights into potential duration-related issues.

By following these optimization strategies, you can enhance the effectiveness of your VAST video ad duration testing and ensure a better user experience.

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Example Scenario

Consider a scenario where a VAST tag is submitted for testing, but the duration metadata is missing or incorrect. In this case, the VAST tester may report a duration mismatch, indicating that the ad played for a shorter or longer time than expected. By following the optimization strategies outlined above, you can address these issues and improve the accuracy of your VAST video ad duration testing.

Example of what VAST Duration looks like in a VAST tag

In the below example code, this line <Duration>00:00:30</Duration> indicates that the video ad is expected to play for 30 seconds.

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<VAST version="4.0">
  <Ad>
    <InLine>
      <Creatives>
        <Creative>
          <Linear>
            <Duration>00:00:30</Duration>
            <MediaFiles>
              <MediaFile delivery="progressive" type="video/mp4" width="640" height="360">
                <![CDATA[https://example.com/video.mp4]]>
              </MediaFile>
            </MediaFiles>
          </Linear>
        </Creative>
      </Creatives>
    </InLine>
  </Ad>
</VAST>