<div>>b_stat_read=1 only on the 2nd pass, right?</div>
<div>yes <br>>What resolution? At 40kbps, it better be <= QCIF.</div>
<div>it is a qcif movie indeed<br>>How many frames? 2pass doesn't do much on short videos, other than giving<br>>more accurate bitrate. It only matters when there's many scenes of varying<br>>complexity.</div>
<div>the movie is 300 frames long , maybe that is not big enough for the 2PASS</div>
<div>to take effect?<br><br><br><br> </div>
<div><span class="gmail_quote">On 12/21/05, <b class="gmail_sendername">Loren Merritt</b> <<a href="mailto:lorenm@u.washington.edu">lorenm@u.washington.edu</a>> wrote:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">On Wed, 21 Dec 2005, shauli rozen wrote:<br><br>> Hi All.<br>><br>> I am trying to encode the a test vector with some movement to low bit
<br>> rate (25 fps at 40kbps ).<br>> I tried using both abr and 2pass , and even though 2pass gives me a<br>> more accurate bit rate results<br>> I don't see much gain in quality over the abr.<br>><br>> I am using the two pass by setting both b_stat_write and b_stat_read to 1,
<br>> and then I run the encoder twice.<br>><br>> Is it true that there is no much gain in using 2pass for really low bit rate<br>> ? I expected much better results in the 2pass.<br>><br>> Maybe I am doing something wrong?
<br><br>b_stat_read=1 only on the 2nd pass, right?<br>What resolution? At 40kbps, it better be <= QCIF.<br>How many frames? 2pass doesn't do much on short videos, other than giving<br>more accurate bitrate. It only matters when there's many scenes of varying
<br>complexity.<br><br>--Loren Merritt<br><br>--<br>This is the x264-devel mailing-list<br>To unsubscribe, go to: <a href="http://developers.videolan.org/lists.html">http://developers.videolan.org/lists.html</a><br><br></blockquote>
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