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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>This was the cmdline info used (Though I don’t know which build of x265 was used):<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><<<o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><b><span style='font-size:10.0pt;font-family:"Courier New"'>./x265 --input ~/FILES/yuv/720p50_parkrun_ter.yuv --fps 30 --input-res 1280x720 --refresh 2 -i 30 --bitrate 5000 -o parkrun_ter_720p30fps_5Mbps.hevc<o:p></o:p></span></b></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='color:#1F497D'>Encoding info as printed by x265 is below.</span><span style='font-size:10.0pt;font-family:"Courier New"'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'>yuv [info]: 1280x720 30Hz, frames 0 - 49 of 50<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'>x265 [info]: detected SIMD architectures SSE2 SSE3 SSSE3 SSE4.1 SSE4.2 <o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'>x265 [info]: performance primitives: intrinsic<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'>x265 [info]: Main profile, Level-3.1 (Main tier)<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'>x265 [info]: WPP streams / pool / frames : 12 / 8 / 1<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'>x265 [info]: CU size : 64<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'>x265 [info]: Max RQT depth inter / intra : 3 / 3<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'>x265 [info]: ME / range / subpel / merge : star / 60 / 5 / 5<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'>x265 [info]: Keyframe min / max : 30 / 30<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'>x265 [info]: Rate Control : ABR-5000 kbps<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'>x265 [info]: Lookahead len / <b>-b</b> / bAdapt : 10 / <b>3</b> / 1 <b><i>[Default is max 3 consecutive B-frames, corresponding to “-b 3” option]</i></b><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'>x265 [info]: tools: rect amp rdo rdoq lft sao sao-lcu sign-hide tskip tskip-fast rdoqts <o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'>x265 [info]: frame I:2 kb/s: 38722.20 PSNR Mean: Y:39.782 U:43.591 V:44.109<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'>x265 [info]: frame P:32 kb/s: 5119.59 PSNR Mean: Y:27.178 U:39.095 V:40.228<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'>x265 [info]: frame B:16 kb/s: 1147.47 PSNR Mean: Y:26.369 U:38.924 V:40.048<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'>x265 [info]: global: kb/s: 5192.62 PSNR Mean: Y:27.423 U:39.220 V:40.326<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>encoded 50 frames in 115.83s (0.43 fps), 5193.93 kb/s, Global PSNR: 30.511<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>>><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> x265-devel [mailto:x265-devel-bounces@videolan.org] <b>On Behalf Of </b>Deepthi Devaki Akkoorath<br><b>Sent:</b> Tuesday, September 24, 2013 2:05 AM<br><b>To:</b> Development for x265<br><b>Subject:</b> Re: [x265] Bug report: incorrect computation of sps_max_dec_pic_buffering_minus1<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal>Olivier,<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>I couldn't reproduce the problem with b-frames enabled. I will be able to look into it better once I get the exact command line.<o:p></o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>- Deepthi<o:p></o:p></p></div></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p><div><p class=MsoNormal>On Tue, Sep 24, 2013 at 1:25 AM, Steve Borho <<a href="mailto:steve@borho.org" target="_blank">steve@borho.org</a>> wrote:<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p><div><div><p class=MsoNormal>On Mon, Sep 23, 2013 at 2:38 PM, Olivier Lapicque <<a href="mailto:olapicque@nvidia.com" target="_blank">olapicque@nvidia.com</a>> wrote:<o:p></o:p></p><div><div><p><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>“(param->bframes+2)-1” seems correct for 1-backward and 1 forward reference (but seems like it would be too low for more than 2 refs).</span><o:p></o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p></div></div><div><p class=MsoNormal>Yeah, we haven't re-enabled multiple refs yet after plugging in the new lookahead. It should happen soon, though.<o:p></o:p></p></div><div><div><p class=MsoNormal> <o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><p><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>The exact condition that was violated in the bitstream I saw is the following:</span><o:p></o:p></p><p><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>NumNegativePics(4) + NumPositivePics(1) + num_long_term_sps(0) + num_long_term_pics(0) > max_dec_pic_buffering_minus1(3)+1</span><o:p></o:p></p><p><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p><p><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I’ll get the exact cmdline parameters to reproduce this, but I was told that this problem occurs any time B-frames are enabled.</span><o:p></o:p></p></div></div></blockquote><div><p class=MsoNormal><o:p> </o:p></p></div></div><div><p class=MsoNormal>Ah, ok. The problem is probably with NumNegativePics then. We'll take a look at this.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>--<o:p></o:p></p></div><div><p class=MsoNormal>Steve Borho<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div></div></div></div><p class=MsoNormal style='margin-bottom:12.0pt'><br>_______________________________________________<br>x265-devel mailing list<br><a href="mailto:x265-devel@videolan.org">x265-devel@videolan.org</a><br><a href="https://mailman.videolan.org/listinfo/x265-devel" target="_blank">https://mailman.videolan.org/listinfo/x265-devel</a><o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div></div>
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