What are sync samples in media extractor output
<p>Hi I am developing an android application that decodes a video(mp4) file.During decoding process media extractor extracts 2 types of samples.</p>

<ol>
<li>Sync samples</li>
<li>Data samples</li>
</ol>

<p>When i prevent giving sync samples to the media decoder,It wont decode the samples at all.Why is it so ? what is the significance of sync samples here ? btw what are these sync samples?</p>

<p>Can anyone help me out in this ?</p>
