Hi Kirill,

https://bugs.openjdk.java.net/browse/JDK-8135304
http://cr.openjdk.java.net/~almatvee/8135304/webrev.00/

This issue affects all MP4 files with header at the end of file and when file is larger then 10 megs.

- javasource was not supporting GST_QUERY_SEEKING and thus qtdemux assumed that file is not seekable and thus was not able to find header. - After fixing above file still was not played, because javasource was not able to send NEW SEGMENT after it send EOS. Fixed by flushing source pad on javasource. - Also, we need to clear pending events in progressbuffer when seek is performed, otherwise it breaks playback intermittently by sending wrong sequence of events.

Thanks,
Alexander

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