https://community.intel.com/t5/Intel-Integrated-Performance/MediaData-GetTime-Error/m-p/860924#M7721 How does the MPEG-4 decoder [6.0.0.062] compute the frame time returned by MediaData::GetTime? Since MPEG-4 does not support timestamps, but rather individual frame durations, the MPEG-4 decoder should keep a running sum of individual frame durations. We have done some testing with varying frame durations, and the evidence appears to suggest that the MPEG-4 decoder is disregarding individual frame durations and perhaps instead relying on simple frame rate information from a MOOV box.<BR /><BR />This is not an academic issue. Our application has multiple child windows, each running a separate MPEG-4 video+audio stream, and must synchronize the streams using the individual frame duration information.<BR /><BR />Does the MPEG-4 decoder keep a running sum of the individual frame durations? Tue, 20 Jan 2009 17:12:20 GMT franknatoli 2009-01-20T17:12:20Z https://community.intel.com/t5/Intel-Integrated-Performance/MediaData-GetTime-Error/m-p/860924#M7721 How does the MPEG-4 decoder [6.0.0.062] compute the frame time returned by MediaData::GetTime? Since MPEG-4 does not support timestamps, but rather individual frame durations, the MPEG-4 decoder should keep a running sum of individual frame durations. We have done some testing with varying frame durations, and the evidence appears to suggest that the MPEG-4 decoder is disregarding individual frame durations and perhaps instead relying on simple frame rate information from a MOOV box.<BR /><BR />This is not an academic issue. Our application has multiple child windows, each running a separate MPEG-4 video+audio stream, and must synchronize the streams using the individual frame duration information.<BR /><BR />Does the MPEG-4 decoder keep a running sum of the individual frame durations? Tue, 20 Jan 2009 17:12:20 GMT https://community.intel.com/t5/Intel-Integrated-Performance/MediaData-GetTime-Error/m-p/860924#M7721 franknatoli 2009-01-20T17:12:20Z