<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:굴림, sans-serif;font-size:10pt"><DIV>Dear all,</DIV>
<DIV> </DIV>
<DIV>I write this e-mail to figure out whether this is bug or not.</DIV>
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<DIV>Recently I got a report from my customer with an x264 stream.</DIV>
<DIV> </DIV>
<DIV>(My company is H/W codec provider in South Korea)</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>After checking the streams with Tektronix Analyzer, </DIV>
<DIV> </DIV>
<DIV>I found that there were some motion vector being out of normal range</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>In H.264 level 5.1, As you know, Vertical motion vectors does not exceed [-512, +511.75].</DIV>
<DIV> </DIV>
<DIV>In the result of the Analyzer, some vertical motion vector has -512.75 , -525 etc...</DIV>
<DIV> </DIV>
<DIV>Are these value available in X264 ? </DIV>
<DIV> </DIV>
<DIV>In my guess, X264 also follows the ragne of H.264 and doesn't exceed. </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>If you had received or heard about similar report, please let me know</DIV>
<DIV> </DIV>
<DIV>Whether this is normal in X264 or debug...</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>( I don't know the version of the encoder that my customer used to make the stream.)</DIV>
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<DIV> </DIV>
<DIV>Kindest Regards</DIV>
<DIV>-Kevin.lim</DIV></div><br>
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