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• H.264 and VP8 for still image coding : WebP ?

  1er octobre 2010, par Dark Shikari — H.264, VP8, google, psychovisual optimizations

  JPEG is a very old lossy image format. By today’s standards, it’s awful compression-wise : practically every video format since the days of MPEG-2 has been able to tie or beat JPEG at its own game. The reasons people haven’t switched to something more modern practically always boil down to a simple one — it’s just not worth the hassle. Even if JPEG can be beaten by a factor of 2, convincing the entire world to change image formats after 20 years is nigh impossible. Furthermore, JPEG is fast, simple, and practically guaranteed to be free of any intellectual property worries. It’s been tried before : JPEG-2000 first, then Microsoft’s JPEG XR, both tried to unseat JPEG. Neither got much of anywhere.

  Now Google is trying to dump yet another image format on us, “WebP”. But really, it’s just a VP8 intra frame. There are some obvious practical problems with this new image format in comparison to JPEG ; it doesn’t even support all of JPEG’s features, let alone many of the much-wanted features JPEG was missing (alpha channel support, lossless support). It only supports 4:2:0 chroma subsampling, while JPEG can handle 4:2:2 and 4:4:4. Google doesn’t seem interested in adding any of these features either.

  But let’s get to the meat and see how these encoders stack up on compressing still images. As I explained in my original analysis, VP8 has the advantage of H.264′s intra prediction, which is one of the primary reasons why H.264 has such an advantage in intra compression. It only has i4x4 and i16x16 modes, not i8x8, so it’s not quite as fancy as H.264′s, but it comes close.

  The test files are all around 155KB ; download them for the exact filesizes. For all three, I did a binary search of quality levels to get the file sizes close. For x264, I encoded with --tune stillimage --preset placebo. For libvpx, I encoded with --best. For JPEG, I encoded with ffmpeg, then applied jpgcrush, a lossless jpeg compressor. I suspect there are better JPEG encoders out there than ffmpeg ; if you have one, feel free to test it and post the results. The source image is the 200th frame of Parkjoy, from derf’s page (fun fact : this video was shot here ! More info on the video here.).

  Files : (x264 [154KB], vp8 [155KB], jpg [156KB])

  Results (decoded to PNG) : (x264, vp8, jpg)

  This seems rather embarrassing for libvpx. Personally I think VP8 looks by far the worst of the bunch, despite JPEG’s blocking. What’s going on here ? VP8 certainly has better entropy coding than JPEG does (by far !). It has better intra prediction (JPEG has just DC prediction). How could VP8 look worse ? Let’s investigate.

  VP8 uses a 4×4 transform, which tends to blur and lose more detail than JPEG’s 8×8 transform. But that alone certainly isn’t enough to create such a dramatic difference. Let’s investigate a hypothesis — that the problem is that libvpx is optimizing for PSNR and ignoring psychovisual considerations when encoding the image… I’ll encode with --tune psnr --preset placebo in x264, turning off all psy optimizations. 

  Files : (x264, optimized for PSNR [154KB]) [Note for the technical people : because adaptive quantization is off, to get the filesize on target I had to use a CQM here.]

  Results (decoded to PNG) : (x264, optimized for PSNR)

  What a blur ! Only somewhat better than VP8, and still worse than JPEG. And that’s using the same encoder and the same level of analysis — the only thing done differently is dropping the psy optimizations. Thus we come back to the conclusion I’ve made over and over on this blog — the encoder matters more than the video format, and good psy optimizations are more important than anything else for compression. libvpx, a much more powerful encoder than ffmpeg’s jpeg encoder, loses because it tries too hard to optimize for PSNR.

  These results raise an obvious question — is Google nuts ? I could understand the push for “WebP” if it was better than JPEG. And sure, technically as a file format it is, and an encoder could be made for it that’s better than JPEG. But note the word “could”. Why announce it now when libvpx is still such an awful encoder ? You’d have to be nuts to try to replace JPEG with this blurry mess as-is. Now, I don’t expect libvpx to be able to compete with x264, the best encoder in the world — but surely it should be able to beat an image format released in 1992 ?

  Earth to Google : make the encoder good first, then promote it as better than the alternatives. The reverse doesn’t work quite as well.

  [155KB]

• ffmpeg - How to determine if -movflags faststart is enabled ? PHP

  3 juin 2015, par IIIOXIII

  While I am able to encode an mp4 file which I can play on my local windows machine, I am having trouble encoding files to mp4 which are readable when streaming by safari, etc.

  After a bit of reading, I believe my issue is that I must move the metadata from the end of the file to the beginning in order for the converted mp4 files to be streamable.

  To that end, I am trying to find out if the build of ffmpeg that I am currently using is able to use the -movflags faststart option through php - as my current outputted mp4 files are not working when streamed online.

  This is the way I am now echoing the -help, -formats, -codecs, but I am not seeing anything about -movflags faststart in any of the lists :

  exec($ffmpegPath." -help", $codecArr);
  
  for($ii=0;$iibr>';
  
  }

  Is there a similar method of determining if -movflags fastart is available to my ffmpeg build ? Any other way ? Should it be listed with any of the previously suggested commands ? -help/-formats ?

  Can someone that knows it is enabled in their version of ffmpeg check to see if it is listed under -help or -formats, etc.?

  TIA.

  EDIT : COMPLETE CONSOLE OUTPUT FOR BOTH THE CONVERSION COMMAND AND -MOVFLAGS COMMAND BELOW :

  COMMAND :

  ffmpeg -i C:\vidtests\Wildlife.wmv -s 640x480 C:\vidtests\Wildlife.mp4 

  OUTPUT :

  ffmpeg version N-54207-ge59fb3f Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Jun 25 2013 21:55:00 with gcc 4.7.3 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
  
  e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
  
  ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
  
  ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
  
  eex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-
  
  amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --
  
  enable-libxvid --enable-zlib
  
    libavutil      52. 37.101 / 52. 37.101
  
    libavcodec     55. 17.100 / 55. 17.100
  
    libavformat    55. 10.100 / 55. 10.100
  
    libavdevice    55.  2.100 / 55.  2.100
  
    libavfilter     3. 77.101 /  3. 77.101
  
    libswscale      2.  3.100 /  2.  3.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  3.100 / 52.  3.100
  
  [asf @ 00000000002ed760] Stream #0: not enough frames to estimate rate; consider
  
   increasing probesize
  
  Guessed Channel Layout for  Input Stream #0.0 : stereo
  
  Input #0, asf, from 'C:\vidtests\Wildlife.wmv'
  
  :
  
    Metadata:
  
      SfOriginalFPS   : 299700
  
      WMFSDKVersion   : 11.0.6001.7000
  
      WMFSDKNeeded    : 0.0.0.0000
  
      comment         : Footage: Small World Productions, Inc; Tourism New Zealand
  
   | Producer: Gary F. Spradling | Music: Steve Ball
  
      title           : Wildlife in HD
  
      copyright       : ┬⌐ 2008 Microsoft Corporation
  
      IsVBR           : 0
  
      DeviceConformanceTemplate: AP@L3
  
    Duration: 00:00:30.09, start: 0.000000, bitrate: 6977 kb/s
  
      Stream #0:0(eng): Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, stereo, fltp
  
  , 192 kb/s
  
      Stream #0:1(eng): Video: vc1 (Advanced) (WVC1 / 0x31435657), yuv420p, 1280x7
  
  20, 5942 kb/s, 29.97 tbr, 1k tbn, 1k tbc
  
  [libx264 @ 00000000002e6980] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64
  
  
  
  [libx264 @ 00000000002e6980] profile High, level 3.0
  
  [libx264 @ 00000000002e6980] 264 - core 133 r2334 a3ac64b - H.264/MPEG-4 AVC cod
  
  ec - Copyleft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=1 r
  
  ef=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed
  
  _ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pski
  
  p=1 chroma_qp_offset=-2 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 deci
  
  mate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_
  
  adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=2
  
  5 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.6
  
  0 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to 'C:\vidtests\Wildlife.mp4':
  
  
  
    Metadata:
  
      SfOriginalFPS   : 299700
  
      WMFSDKVersion   : 11.0.6001.7000
  
      WMFSDKNeeded    : 0.0.0.0000
  
      comment         : Footage: Small World Productions, Inc; Tourism New Zealand
  
   | Producer: Gary F. Spradling | Music: Steve Ball
  
      title           : Wildlife in HD
  
      copyright       : ┬⌐ 2008 Microsoft Corporation
  
      IsVBR           : 0
  
      DeviceConformanceTemplate: AP@L3
  
      encoder         : Lavf55.10.100
  
      Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 6
  
  40x480, q=-1--1, 30k tbn, 29.97 tbc
  
      Stream #0:1(eng): Audio: aac (libvo_aacenc) ([64][0][0][0] / 0x0040), 44100
  
  Hz, stereo, s16, 128 kb/s
  
  Stream mapping:
  
    Stream #0:1 -> #0:0 (vc1 -> libx264)
  
    Stream #0:0 -> #0:1 (wmav2 -> libvo_aacenc)
  
  Press [q] to stop, [?] for help
  
  frame=   53 fps= 49 q=29.0 size=       0kB time=00:00:00.13 bitrate=   2.9kbits/
  
  frame=   63 fps= 40 q=29.0 size=       0kB time=00:00:00.46 bitrate=   0.8kbits/
  
  frame=   74 fps= 35 q=29.0 size=       0kB time=00:00:00.83 bitrate=   0.5kbits/
  
  frame=   85 fps= 32 q=29.0 size=       0kB time=00:00:01.20 bitrate=   0.3kbits/
  
  frame=   95 fps= 30 q=29.0 size=       0kB time=00:00:01.53 bitrate=   0.3kbits/
  
  frame=  107 fps= 28 q=29.0 size=       0kB time=00:00:01.93 bitrate=   0.2kbits/
  
  Queue input is backward in time
  
  [mp4 @ 00000000003ef800] Non-monotonous DTS in output stream 0:1; previous: 7616
  
  , current: 7063; changing to 7617. This may result in incorrect timestamps in th
  
  e output file.
  
  frame=  118 fps= 28 q=29.0 size=     113kB time=00:00:02.30 bitrate= 402.6kbits/
  
  frame=  129 fps= 26 q=29.0 size=     219kB time=00:00:02.66 bitrate= 670.7kbits/
  
  frame=  141 fps= 26 q=29.0 size=     264kB time=00:00:03.06 bitrate= 704.2kbits/
  
  frame=  152 fps= 25 q=29.0 size=     328kB time=00:00:03.43 bitrate= 782.2kbits/
  
  frame=  163 fps= 25 q=29.0 size=     431kB time=00:00:03.80 bitrate= 928.1kbits/
  
  frame=  174 fps= 24 q=29.0 size=     568kB time=00:00:04.17 bitrate=1116.3kbits/
  
  frame=  190 fps= 25 q=29.0 size=     781kB time=00:00:04.70 bitrate=1359.9kbits/
  
  frame=  204 fps= 25 q=29.0 size=    1006kB time=00:00:05.17 bitrate=1593.1kbits/
  
  frame=  218 fps= 25 q=29.0 size=    1058kB time=00:00:05.63 bitrate=1536.8kbits/
  
  frame=  229 fps= 25 q=29.0 size=    1093kB time=00:00:06.00 bitrate=1490.9kbits/
  
  frame=  239 fps= 24 q=29.0 size=    1118kB time=00:00:06.33 bitrate=1444.4kbits/
  
  frame=  251 fps= 24 q=29.0 size=    1150kB time=00:00:06.74 bitrate=1397.9kbits/
  
  frame=  265 fps= 24 q=29.0 size=    1234kB time=00:00:07.20 bitrate=1402.3kbits/
  
  frame=  278 fps= 25 q=29.0 size=    1332kB time=00:00:07.64 bitrate=1428.3kbits/
  
  frame=  294 fps= 25 q=29.0 size=    1403kB time=00:00:08.17 bitrate=1405.7kbits/
  
  frame=  308 fps= 25 q=29.0 size=    1547kB time=00:00:08.64 bitrate=1466.4kbits/
  
  frame=  323 fps= 25 q=29.0 size=    1595kB time=00:00:09.14 bitrate=1429.5kbits/
  
  frame=  337 fps= 25 q=29.0 size=    1702kB time=00:00:09.60 bitrate=1450.7kbits/
  
  frame=  351 fps= 25 q=29.0 size=    1755kB time=00:00:10.07 bitrate=1427.1kbits/
  
  frame=  365 fps= 25 q=29.0 size=    1820kB time=00:00:10.54 bitrate=1414.1kbits/
  
  frame=  381 fps= 25 q=29.0 size=    1852kB time=00:00:11.07 bitrate=1369.6kbits/
  
  frame=  396 fps= 26 q=29.0 size=    1893kB time=00:00:11.57 bitrate=1339.5kbits/
  
  frame=  409 fps= 26 q=29.0 size=    1923kB time=00:00:12.01 bitrate=1311.8kbits/
  
  frame=  421 fps= 25 q=29.0 size=    1967kB time=00:00:12.41 bitrate=1298.3kbits/
  
  frame=  434 fps= 25 q=29.0 size=    1998kB time=00:00:12.84 bitrate=1274.0kbits/
  
  frame=  445 fps= 25 q=29.0 size=    2018kB time=00:00:13.21 bitrate=1251.3kbits/
  
  frame=  458 fps= 25 q=29.0 size=    2048kB time=00:00:13.64 bitrate=1229.5kbits/
  
  frame=  471 fps= 25 q=29.0 size=    2067kB time=00:00:14.08 bitrate=1202.3kbits/
  
  frame=  484 fps= 25 q=29.0 size=    2189kB time=00:00:14.51 bitrate=1235.5kbits/
  
  frame=  497 fps= 25 q=29.0 size=    2260kB time=00:00:14.94 bitrate=1238.3kbits/
  
  frame=  509 fps= 25 q=29.0 size=    2311kB time=00:00:15.34 bitrate=1233.3kbits/
  
  frame=  523 fps= 25 q=29.0 size=    2429kB time=00:00:15.81 bitrate=1258.1kbits/
  
  frame=  535 fps= 25 q=29.0 size=    2541kB time=00:00:16.21 bitrate=1283.5kbits/
  
  frame=  548 fps= 25 q=29.0 size=    2718kB time=00:00:16.64 bitrate=1337.5kbits/
  
  frame=  560 fps= 25 q=29.0 size=    2845kB time=00:00:17.05 bitrate=1367.1kbits/
  
  frame=  571 fps= 25 q=29.0 size=    2965kB time=00:00:17.41 bitrate=1394.6kbits/
  
  frame=  580 fps= 25 q=29.0 size=    3025kB time=00:00:17.71 bitrate=1398.7kbits/
  
  frame=  588 fps= 25 q=29.0 size=    3098kB time=00:00:17.98 bitrate=1411.1kbits/
  
  frame=  597 fps= 25 q=29.0 size=    3183kB time=00:00:18.28 bitrate=1426.1kbits/
  
  frame=  606 fps= 24 q=29.0 size=    3279kB time=00:00:18.58 bitrate=1445.2kbits/
  
  frame=  616 fps= 24 q=29.0 size=    3441kB time=00:00:18.91 bitrate=1489.9kbits/
  
  frame=  626 fps= 24 q=29.0 size=    3650kB time=00:00:19.25 bitrate=1553.0kbits/
  
  frame=  638 fps= 24 q=29.0 size=    3826kB time=00:00:19.65 bitrate=1594.7kbits/
  
  frame=  649 fps= 24 q=29.0 size=    3950kB time=00:00:20.02 bitrate=1616.3kbits/
  
  frame=  660 fps= 24 q=29.0 size=    4067kB time=00:00:20.38 bitrate=1634.1kbits/
  
  frame=  669 fps= 24 q=29.0 size=    4121kB time=00:00:20.68 bitrate=1631.8kbits/
  
  frame=  682 fps= 24 q=29.0 size=    4274kB time=00:00:21.12 bitrate=1657.9kbits/
  
  frame=  696 fps= 24 q=29.0 size=    4446kB time=00:00:21.58 bitrate=1687.1kbits/
  
  frame=  709 fps= 24 q=29.0 size=    4590kB time=00:00:22.02 bitrate=1707.3kbits/
  
  frame=  719 fps= 24 q=29.0 size=    4772kB time=00:00:22.35 bitrate=1748.5kbits/
  
  frame=  732 fps= 24 q=29.0 size=    4852kB time=00:00:22.78 bitrate=1744.3kbits/
  
  frame=  744 fps= 24 q=29.0 size=    4973kB time=00:00:23.18 bitrate=1756.9kbits/
  
  frame=  756 fps= 24 q=29.0 size=    5099kB time=00:00:23.59 bitrate=1770.8kbits/
  
  frame=  768 fps= 24 q=29.0 size=    5149kB time=00:00:23.99 bitrate=1758.4kbits/
  
  frame=  780 fps= 24 q=29.0 size=    5227kB time=00:00:24.39 bitrate=1755.7kbits/
  
  frame=  797 fps= 24 q=29.0 size=    5377kB time=00:00:24.95 bitrate=1765.0kbits/
  
  frame=  813 fps= 24 q=29.0 size=    5507kB time=00:00:25.49 bitrate=1769.5kbits/
  
  frame=  828 fps= 24 q=29.0 size=    5634kB time=00:00:25.99 bitrate=1775.5kbits/
  
  frame=  843 fps= 24 q=29.0 size=    5701kB time=00:00:26.49 bitrate=1762.9kbits/
  
  frame=  859 fps= 24 q=29.0 size=    5830kB time=00:00:27.02 bitrate=1767.0kbits/
  
  frame=  872 fps= 24 q=29.0 size=    5926kB time=00:00:27.46 bitrate=1767.7kbits/
  
  frame=  888 fps= 24 q=29.0 size=    6014kB time=00:00:27.99 bitrate=1759.7kbits/
  
  frame=  900 fps= 24 q=29.0 size=    6332kB time=00:00:28.39 bitrate=1826.9kbits/
  
  frame=  901 fps= 24 q=-1.0 Lsize=    6717kB time=00:00:30.10 bitrate=1828.0kbits
  
  /s
  
  video:6211kB audio:472kB subtitle:0 global headers:0kB muxing overhead 0.513217%
  
  
  
  [libx264 @ 00000000002e6980] frame I:8     Avg QP:21.77  size: 39744
  
  [libx264 @ 00000000002e6980] frame P:433   Avg QP:25.69  size: 11490
  
  [libx264 @ 00000000002e6980] frame B:460   Avg QP:29.25  size:  2319
  
  [libx264 @ 00000000002e6980] consecutive B-frames:  5.4% 78.6%  2.7% 13.3%
  
  [libx264 @ 00000000002e6980] mb I  I16..4: 21.8% 48.8% 29.5%
  
  [libx264 @ 00000000002e6980] mb P  I16..4:  0.7%  4.0%  1.3%  P16..4: 37.1% 22.2
  
  % 15.5%  0.0%  0.0%    skip:19.2%
  
  [libx264 @ 00000000002e6980] mb B  I16..4:  0.1%  0.5%  0.2%  B16..8: 43.5%  7.0
  
  %  2.1%  direct: 2.2%  skip:44.5%  L0:36.4% L1:52.7% BI:10.9%
  
  [libx264 @ 00000000002e6980] 8x8 transform intra:62.8% inter:56.2%
  
  [libx264 @ 00000000002e6980] coded y,uvDC,uvAC intra: 74.2% 78.8% 44.0% inter: 2
  
  3.6% 14.5% 1.0%
  
  [libx264 @ 00000000002e6980] i16 v,h,dc,p: 48% 24%  9% 20%
  
  [libx264 @ 00000000002e6980] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 16% 17% 15%  7%  8%
  
  11%  8% 10%  8%
  
  [libx264 @ 00000000002e6980] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 17% 15%  7% 10%
  
  11%  8%  7%  7%
  
  [libx264 @ 00000000002e6980] i8c dc,h,v,p: 53% 21% 18%  7%
  
  [libx264 @ 00000000002e6980] Weighted P-Frames: Y:0.7% UV:0.0%
  
  [libx264 @ 00000000002e6980] ref P L0: 62.4% 19.0% 12.0%  6.6%  0.0%
  
  [libx264 @ 00000000002e6980] ref B L0: 90.5%  8.9%  0.7%
  
  [libx264 @ 00000000002e6980] ref B L1: 97.9%  2.1%
  
  [libx264 @ 00000000002e6980] kb/s:1692.37

  AND THE –MOVFLAGS COMMAND :

  ffmpeg -i C:\vidtests\Wildlife.mp4 -movflags faststart C:\vidtests\Wildlife_fs.mp4

  AND THE –MOVFLAGS OUTPUT

  ffmpeg version N-54207-ge59fb3f Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Jun 25 2013 21:55:00 with gcc 4.7.3 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
  
  e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
  
  ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
  
  ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
  
  eex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-
  
  amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --
  
  enable-libxvid --enable-zlib
  
    libavutil      52. 37.101 / 52. 37.101
  
    libavcodec     55. 17.100 / 55. 17.100
  
    libavformat    55. 10.100 / 55. 10.100
  
    libavdevice    55.  2.100 / 55.  2.100
  
    libavfilter     3. 77.101 /  3. 77.101
  
    libswscale      2.  3.100 /  2.  3.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\vidtests\Wildlife.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      title           : Wildlife in HD
  
      encoder         : Lavf55.10.100
  
      comment         : Footage: Small World Productions, Inc; Tourism New Zealand
  
   | Producer: Gary F. Spradling | Music: Steve Ball
  
      copyright       : ┬⌐ 2008 Microsoft Corporation
  
    Duration: 00:00:30.13, start: 0.036281, bitrate: 1826 kb/s
  
      Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 640x480,
  
  1692 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 12
  
  8 kb/s
  
      Metadata:
  
        handler_name    : SoundHandler
  
  [libx264 @ 0000000004360620] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64
  
  
  
  [libx264 @ 0000000004360620] profile High, level 3.0
  
  [libx264 @ 0000000004360620] 264 - core 133 r2334 a3ac64b - H.264/MPEG-4 AVC cod
  
  ec - Copyleft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=1 r
  
  ef=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed
  
  _ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pski
  
  p=1 chroma_qp_offset=-2 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 deci
  
  mate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_
  
  adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=2
  
  5 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.6
  
  0 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to 'C:\vidtests\Wildlife_fs.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      title           : Wildlife in HD
  
      copyright       : ┬⌐ 2008 Microsoft Corporation
  
      comment         : Footage: Small World Productions, Inc; Tourism New Zealand
  
   | Producer: Gary F. Spradling | Music: Steve Ball
  
      encoder         : Lavf55.10.100
  
      Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 6
  
  40x480, q=-1--1, 30k tbn, 29.97 tbc
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(eng): Audio: aac (libvo_aacenc) ([64][0][0][0] / 0x0040), 44100
  
  Hz, stereo, s16, 128 kb/s
  
      Metadata:
  
        handler_name    : SoundHandler
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 -> libx264)
  
    Stream #0:1 -> #0:1 (aac -> libvo_aacenc)
  
  Press [q] to stop, [?] for help
  
  frame=   52 fps=0.0 q=29.0 size=      29kB time=00:00:01.76 bitrate= 133.9kbits/
  
  frame=   63 fps= 60 q=29.0 size=     104kB time=00:00:02.14 bitrate= 397.2kbits/
  
  frame=   74 fps= 47 q=29.0 size=     176kB time=00:00:02.51 bitrate= 573.2kbits/
  
  frame=   87 fps= 41 q=29.0 size=     265kB time=00:00:02.93 bitrate= 741.2kbits/
  
  frame=  101 fps= 37 q=29.0 size=     358kB time=00:00:03.39 bitrate= 862.8kbits/
  
  frame=  113 fps= 34 q=29.0 size=     437kB time=00:00:03.79 bitrate= 943.7kbits/
  
  frame=  125 fps= 33 q=29.0 size=     520kB time=00:00:04.20 bitrate=1012.2kbits/
  
  frame=  138 fps= 32 q=29.0 size=     606kB time=00:00:04.64 bitrate=1069.8kbits/
  
  frame=  151 fps= 31 q=29.0 size=     696kB time=00:00:05.06 bitrate=1124.3kbits/
  
  frame=  163 fps= 30 q=29.0 size=     780kB time=00:00:05.47 bitrate=1166.4kbits/
  
  frame=  176 fps= 30 q=29.0 size=     919kB time=00:00:05.90 bitrate=1273.9kbits/
  
  frame=  196 fps= 31 q=29.0 size=     994kB time=00:00:06.57 bitrate=1237.4kbits/
  
  frame=  213 fps= 31 q=29.0 size=    1097kB time=00:00:07.13 bitrate=1258.8kbits/
  
  frame=  225 fps= 30 q=29.0 size=    1204kB time=00:00:07.53 bitrate=1309.8kbits/
  
  frame=  236 fps= 30 q=29.0 size=    1323kB time=00:00:07.91 bitrate=1369.4kbits/
  
  frame=  249 fps= 29 q=29.0 size=    1451kB time=00:00:08.34 bitrate=1424.6kbits/
  
  frame=  263 fps= 29 q=29.0 size=    1574kB time=00:00:08.82 bitrate=1461.3kbits/
  
  frame=  278 fps= 29 q=29.0 size=    1610kB time=00:00:09.30 bitrate=1416.9kbits/
  
  frame=  296 fps= 30 q=29.0 size=    1655kB time=00:00:09.91 bitrate=1368.0kbits/
  
  frame=  313 fps= 30 q=29.0 size=    1697kB time=00:00:10.48 bitrate=1326.4kbits/
  
  frame=  330 fps= 30 q=29.0 size=    1737kB time=00:00:11.05 bitrate=1286.5kbits/
  
  frame=  345 fps= 30 q=29.0 size=    1776kB time=00:00:11.54 bitrate=1260.4kbits/
  
  frame=  361 fps= 30 q=29.0 size=    1813kB time=00:00:12.07 bitrate=1230.3kbits/
  
  frame=  377 fps= 30 q=29.0 size=    1847kB time=00:00:12.59 bitrate=1201.4kbits/
  
  frame=  395 fps= 30 q=29.0 size=    1880kB time=00:00:13.22 bitrate=1165.0kbits/
  
  frame=  410 fps= 30 q=29.0 size=    1993kB time=00:00:13.72 bitrate=1190.2kbits/
  
  frame=  424 fps= 30 q=29.0 size=    2080kB time=00:00:14.18 bitrate=1201.4kbits/
  
  frame=  439 fps= 30 q=29.0 size=    2166kB time=00:00:14.67 bitrate=1209.4kbits/
  
  frame=  455 fps= 30 q=29.0 size=    2262kB time=00:00:15.21 bitrate=1217.5kbits/
  
  frame=  469 fps= 30 q=29.0 size=    2341kB time=00:00:15.68 bitrate=1223.0kbits/
  
  frame=  484 fps= 30 q=29.0 size=    2430kB time=00:00:16.19 bitrate=1229.1kbits/
  
  frame=  500 fps= 30 q=29.0 size=    2523kB time=00:00:16.71 bitrate=1236.3kbits/
  
  frame=  515 fps= 30 q=29.0 size=    2607kB time=00:00:17.21 bitrate=1240.4kbits/
  
  frame=  531 fps= 30 q=29.0 size=    2681kB time=00:00:17.73 bitrate=1238.2kbits/
  
  frame=  546 fps= 30 q=29.0 size=    2758kB time=00:00:18.24 bitrate=1238.2kbits/
  
  frame=  561 fps= 30 q=29.0 size=    2824kB time=00:00:18.75 bitrate=1233.4kbits/
  
  frame=  576 fps= 30 q=29.0 size=    2955kB time=00:00:19.25 bitrate=1256.8kbits/
  
  frame=  586 fps= 29 q=29.0 size=    3061kB time=00:00:19.59 bitrate=1279.6kbits/
  
  frame=  598 fps= 29 q=29.0 size=    3217kB time=00:00:19.99 bitrate=1318.4kbits/
  
  frame=  610 fps= 29 q=29.0 size=    3354kB time=00:00:20.39 bitrate=1347.2kbits/
  
  frame=  622 fps= 29 q=29.0 size=    3483kB time=00:00:20.78 bitrate=1372.6kbits/
  
  frame=  634 fps= 29 q=29.0 size=    3593kB time=00:00:21.19 bitrate=1388.6kbits/
  
  frame=  648 fps= 29 q=29.0 size=    3708kB time=00:00:21.66 bitrate=1402.3kbits/
  
  frame=  661 fps= 29 q=29.0 size=    3811kB time=00:00:22.08 bitrate=1413.5kbits/
  
  frame=  674 fps= 29 q=29.0 size=    3978kB time=00:00:22.53 bitrate=1446.3kbits/
  
  frame=  690 fps= 29 q=29.0 size=    4133kB time=00:00:23.05 bitrate=1468.4kbits/
  
  frame=  706 fps= 29 q=29.0 size=    4263kB time=00:00:23.58 bitrate=1480.4kbits/
  
  frame=  721 fps= 29 q=29.0 size=    4391kB time=00:00:24.08 bitrate=1493.8kbits/
  
  frame=  735 fps= 29 q=29.0 size=    4524kB time=00:00:24.55 bitrate=1509.4kbits/
  
  frame=  748 fps= 29 q=29.0 size=    4661kB time=00:00:24.98 bitrate=1528.2kbits/
  
  frame=  763 fps= 29 q=29.0 size=    4835kB time=00:00:25.50 bitrate=1553.1kbits/
  
  frame=  778 fps= 29 q=29.0 size=    4993kB time=00:00:25.99 bitrate=1573.6kbits/
  
  frame=  795 fps= 29 q=29.0 size=    5149kB time=00:00:26.56 bitrate=1588.1kbits/
  
  frame=  814 fps= 29 q=29.0 size=    5258kB time=00:00:27.18 bitrate=1584.4kbits/
  
  frame=  833 fps= 29 q=29.0 size=    5368kB time=00:00:27.82 bitrate=1580.2kbits/
  
  frame=  851 fps= 29 q=29.0 size=    5469kB time=00:00:28.43 bitrate=1575.9kbits/
  
  frame=  870 fps= 29 q=29.0 size=    5567kB time=00:00:29.05 bitrate=1569.5kbits/
  
  frame=  889 fps= 29 q=29.0 size=    5688kB time=00:00:29.70 bitrate=1568.4kbits/
  
  Starting second pass: moving header on top of the file
  
  frame=  902 fps= 28 q=-1.0 Lsize=    6109kB time=00:00:30.14 bitrate=1659.8kbits
  
  /s dup=1 drop=0
  
  video:5602kB audio:472kB subtitle:0 global headers:0kB muxing overhead 0.566600%
  
  
  
  [libx264 @ 0000000004360620] frame I:8     Avg QP:20.52  size: 39667
  
  [libx264 @ 0000000004360620] frame P:419   Avg QP:25.06  size: 10524
  
  [libx264 @ 0000000004360620] frame B:475   Avg QP:29.03  size:  2123
  
  [libx264 @ 0000000004360620] consecutive B-frames:  3.2% 79.6%  0.3% 16.9%
  
  [libx264 @ 0000000004360620] mb I  I16..4: 20.7% 52.3% 26.9%
  
  [libx264 @ 0000000004360620] mb P  I16..4:  0.7%  4.2%  1.1%  P16..4: 39.4% 21.4
  
  % 13.8%  0.0%  0.0%    skip:19.3%
  
  [libx264 @ 0000000004360620] mb B  I16..4:  0.1%  0.9%  0.3%  B16..8: 41.8%  6.4
  
  %  1.7%  direct: 1.7%  skip:47.1%  L0:36.4% L1:53.3% BI:10.3%
  
  [libx264 @ 0000000004360620] 8x8 transform intra:65.7% inter:58.8%
  
  [libx264 @ 0000000004360620] coded y,uvDC,uvAC intra: 71.2% 76.6% 35.7% inter: 2
  
  0.7% 13.0% 0.5%
  
  [libx264 @ 0000000004360620] i16 v,h,dc,p: 48% 24%  8% 20%
  
  [libx264 @ 0000000004360620] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 17% 18% 15%  6%  8%
  
  11%  8% 10%  8%
  
  [libx264 @ 0000000004360620] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 16% 15%  7% 10%
  
  11%  8%  8%  7%
  
  [libx264 @ 0000000004360620] i8c dc,h,v,p: 51% 22% 19%  9%
  
  [libx264 @ 0000000004360620] Weighted P-Frames: Y:0.7% UV:0.0%
  
  [libx264 @ 0000000004360620] ref P L0: 63.4% 19.7% 11.0%  5.9%  0.0%
  
  [libx264 @ 0000000004360620] ref B L0: 90.7%  8.7%  0.7%
  
  [libx264 @ 0000000004360620] ref B L1: 98.4%  1.6%
  
  [libx264 @ 0000000004360620] kb/s:1524.54

• Revision 450c7b57a8 : Only do metrics on cropped (visible) area of picture. The part where we align i

  10 juin 2013, par Ronald S. Bultje

  Changed Paths :
   Modify /vp9/encoder/vp9_onyx_if.c

  
   Modify /vp9/encoder/vp9_ssim.c

  
   Modify /vpx_scale/generic/yv12config.c

  
   Modify /vpx_scale/yv12config.h

  
  
  Only do metrics on cropped (visible) area of picture.

  The part where we align it by 8 or 16 is an implementation detail that
  shouldn't matter to the outside world.

  Change-Id : I9edd6f08b51b31c839c0ea91f767640bccb08d53