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Thread: Apple Media Validation Tool / Unable to read video timestamps

  1. #1

    Default Apple Media Validation Tool / Unable to read video timestamps

    Hi All,

    We have noticed the same issue on all bit rate of videos we have encoded when validating using the Apple Media Validation Tool - This is on Wowza 3.1.2:

    On-Demand:
    media_1.ts?wowzasessionid=1276328531:
    WARNING: Unable to read video timestamps in track 0; this may be due to not having a key frame in this segment.
    WARNING: Unable to read decode timestamps in track 0; this may be due to not having a key frame in this segment.
    WARNING: Unable to read video timestamps in track 1; this may be due to not having a key frame in this segment.
    WARNING: Unable to read decode timestamps in track 1; this may be due to not having a key frame in this segment.

    And this issue was mentioned in this post as well. I wonder if there is anyone who has successfully submitted an app to the Apple iOS Acceptance Team despite the validation tool still warns about this error?

    Thanks,
    INS

  2. #2
    Join Date
    Dec 2007
    Posts
    21,962

    Default

    I think this indicates that there is no video in the first chunk because the recording starts with a audio track but no video. If you are recording with Wowza add this Property to the Application.xml /Streams /Properties list:
    <Property>
    <Name>recordWaitForVideoKeyFrame</Name>
    <Value>true</Value>
    <Type>Boolean</Type>
    </Property>
    Richard

  3. #3

    Default

    Hi Richard,

    There is video contained in the first chunk - This is just a vod where mp4s are encoded by Adobe Media Encoder.

    I have received a comment from Apple now:

    http://www.wowza.com/forums/showthre...008#post100008

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