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.