<div dir="ltr">Thanks - this is a high priority item for low bitrate encodes. </div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Sep 26, 2016 at 11:46 PM, xuefeng <span dir="ltr"><<a href="mailto:xuefeng@multicorewareinc.com" target="_blank">xuefeng@multicorewareinc.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>
<div><span></span></div><blockquote style="margin-top:0px;margin-bottom:0px;margin-left:0.5em"><div><div><div>All,</div><div>hello! </div><div><br></div><div><span> x265 set the slice QP in PPS <wbr>to 26</span><span style="font-family:'';font-size:10.5pt;line-height:1.5;background-color:window">. Bits can be saved by <wbr>calculating a closer <wbr>approximation to the actual <wbr>slice QP values utilized to <wbr>encode the bitstream at <wbr>different quality levels. The <wbr>delta QP in each slice header <wbr>is huge especially at low bit <wbr>rate and quality levels.</span></div>
<div><br></div><div>My test command is as follows.</div><div><span style="font-family:'';font-size:10.5pt;line-height:1.5;background-color:window"><b>--repeat-headers --hash 1 --<wbr>input-res 1280x720 --keyint 30 --min-keyint 30 --input "Johnny_1280x720.y4m" <wbr>--fps 30 --output "test_new.<wbr>mp4" </b></span></div><div><br></div><div>There is a patch in the attachment for this method based on "<span style="background-color:window;font-size:10.5pt;line-height:1.5"><b>Changeset: </b></span><span style="font-size:10.5pt;line-height:1.5;background-color:window"><b>11587 (d20b78d6d138)</b>".</span></div><div><span style="font-size:10.5pt;line-height:1.5;background-color:window">There is information for x265 coding to see that bitrate goes down. There is informations for HM decoding to see that MD5 and QP are the same with the method. </span></div><div><span style="font-size:10.5pt;line-height:1.5;background-color:window"><br></span></div><div><span style="font-size:10.5pt;line-height:1.5;background-color:window"><br></span></div><div><br></div><hr style="width:210px;min-height:1px" color="#b5c4df" size="1" align="left">
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<div><span style="FONT-SIZE:10.5pt;FONT-FAMILY:宋体;COLOR:#000000">Regards,</span></div>
<div><span style="FONT-SIZE:10.5pt;FONT-FAMILY:宋体;COLOR:#000000"></span> </div>
<div><span style="FONT-SIZE:10.5pt;FONT-FAMILY:宋体;COLOR:#000000"> Xuefeng
Jiang</span></div>
<div><span style="FONT-SIZE:10.5pt;FONT-FAMILY:宋体;COLOR:#000000"></span> </div>
<div><span style="FONT-SIZE:10.5pt;FONT-FAMILY:宋体;COLOR:#000000"><a href="mailto:xuefeng@multicorewareinc.com" target="_blank">xuefeng@multicorewareinc.com</a></span></div></div></span></div>
<blockquote style="margin-top:0px;margin-bottom:0px;margin-left:0.5em"><div> </div><div>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature">Deepthi</div>
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