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• Implement static library FFmpeg to Xcode 7

  18 octobre 2015, par Janis Thr

  Can you help me implement the FFmpeg-library to my Xcode 7 project ? I fail on this quest since 3 days without success.

  https://github.com/ciphor/ffmpeg4ios

• ffmpeg conversion .dav to any video files

  22 février 2017, par Marcello Galvão

  I am trying for days to convert .dav file (file generated by dvrs [image recorders]). I have tried several variations with ffmpeg and can not succeed.

  Command and console output :

  $ ffmpeg -i input.dav -codec:v libx264 -crf 23 -preset medium -codec:a libfdk_aac -vbr 4 -movflags faststart -vf scale=-1:720,format=yuv420p output.mp4
  
  ffmpeg version 2.8 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
  
    configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libdcadec --enable-libfreetype --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvo-aacenc --enable-libvidstab
  
    libavutil      54. 31.100 / 54. 31.100
  
    libavcodec     56. 60.100 / 56. 60.100
  
    libavformat    56. 40.101 / 56. 40.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 40.101 /  5. 40.101
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  2.101 /  1.  2.101
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Input #0, h264, from 'input.Dav':
  
    Duration: N/A, bitrate: N/A
  
      Stream #0:0: Video: h264 (Baseline), yuv420p, 704x480, 25 fps, 25 tbr, 1200k tbn, 50 tbc
  
  Codec AVOption vbr (VBR mode (1-5)) specified for output file #0 (output.mp4) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
  
  [libx264 @ 0x2d99e00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
  
  [libx264 @ 0x2d99e00] profile High, level 3.1
  
  [libx264 @ 0x2d99e00] 264 - core 142 r2491 24e4fed - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - http://www.videolan.org/x264.html - options: cabac=1 ref=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_pskip=1 chroma_qp_offset=-2 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 decimate=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=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to 'output.mp4':
  
    Metadata:
  
      encoder         : Lavf56.40.101
  
      Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1056x720, q=-1--1, 25 fps, 12800 tbn, 25 tbc
  
      Metadata:
  
        encoder         : Lavc56.60.100 libx264
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  frame=   58 fps=0.0 q=28.0 size=      93kB time=00:00:00.36 bitrate=2124.9kbits/s    
  
  frame=   76 fps= 71 q=28.0 size=     178kB time=00:00:01.08 bitrate=1347.6kbits/s    
  
  frame=   94 fps= 58 q=28.0 size=     275kB time=00:00:01.80 bitrate=1251.3kbits/s    
  
  frame=  106 fps= 50 q=28.0 size=     393kB time=00:00:02.28 bitrate=1412.9kbits/s    
  
  frame=  122 fps= 46 q=28.0 size=     504kB time=00:00:02.92 bitrate=1413.9kbits/s    
  
  frame=  138 fps= 43 q=28.0 size=     586kB time=00:00:03.56 bitrate=1348.4kbits/s    
  
  frame=  153 fps= 41 q=28.0 size=     676kB time=00:00:04.16 bitrate=1330.4kbits/s    
  
  [h264 @ 0x3348440] Frame num change from 35 to 162
  
  [h264 @ 0x3348440] decode_slice_header error
  
  frame=  166 fps= 39 q=28.0 size=     785kB time=00:00:04.68 bitrate=1374.8kbits/s    
  
  frame=  179 fps= 38 q=28.0 size=     894kB time=00:00:05.20 bitrate=1407.9kbits/s    
  
  frame=  191 fps= 36 q=28.0 size=    1010kB time=00:00:05.68 bitrate=1457.0kbits/s    
  
  frame=  206 fps= 36 q=28.0 size=    1137kB time=00:00:06.28 bitrate=1482.7kbits/s    
  
  frame=  222 fps= 35 q=28.0 size=    1229kB time=00:00:06.92 bitrate=1455.2kbits/s    
  
  frame=  239 fps= 35 q=28.0 size=    1327kB time=00:00:07.60 bitrate=1430.8kbits/s    
  
  frame=  258 fps= 35 q=28.0 size=    1409kB time=00:00:08.36 bitrate=1380.4kbits/s    
  
  frame=  273 fps= 35 q=28.0 size=    1496kB time=00:00:08.96 bitrate=1367.5kbits/s    
  
  frame=  288 fps= 34 q=28.0 size=    1599kB time=00:00:09.56 bitrate=1370.3kbits/s    
  
  frame=  301 fps= 34 q=28.0 size=    1730kB time=00:00:10.08 bitrate=1405.7kbits/s    
  
  frame=  318 fps= 34 q=28.0 size=    1807kB time=00:00:10.76 bitrate=1376.0kbits/s    
  
  frame=  336 fps= 34 q=28.0 size=    1873kB time=00:00:11.48 bitrate=1336.3kbits/s    
  
  frame=  358 fps= 34 q=28.0 size=    1938kB time=00:00:12.36 bitrate=1284.4kbits/s    
  
  frame=  378 fps= 34 q=28.0 size=    1995kB time=00:00:13.16 bitrate=1242.1kbits/s    
  
  frame=  398 fps= 35 q=28.0 size=    2053kB time=00:00:13.96 bitrate=1204.5kbits/s    
  
  frame=  415 fps= 35 q=28.0 size=    2115kB time=00:00:14.64 bitrate=1183.4kbits/s    
  
  frame=  434 fps= 35 q=28.0 size=    2165kB time=00:00:15.40 bitrate=1151.4kbits/s    
  
  frame=  454 fps= 35 q=28.0 size=    2220kB time=00:00:16.20 bitrate=1122.8kbits/s    
  
  frame=  470 fps= 35 q=28.0 size=    2279kB time=00:00:16.84 bitrate=1108.5kbits/s    
  
  frame=  489 fps= 35 q=28.0 size=    2350kB time=00:00:17.60 bitrate=1093.9kbits/s    
  
  frame=  505 fps= 35 q=28.0 size=    2410kB time=00:00:18.24 bitrate=1082.5kbits/s    
  
  frame=  515 fps= 34 q=28.0 size=    2534kB time=00:00:18.64 bitrate=1113.5kbits/s    
  
  frame=  531 fps= 34 q=28.0 size=    2668kB time=00:00:19.28 bitrate=1133.8kbits/s    
  
  frame=  547 fps= 34 q=28.0 size=    2782kB time=00:00:19.92 bitrate=1144.2kbits/s    
  
  frame=  565 fps= 34 q=28.0 size=    2925kB time=00:00:20.64 bitrate=1160.9kbits/s    
  
  frame=  581 fps= 34 q=28.0 size=    3043kB time=00:00:21.28 bitrate=1171.3kbits/s    
  
  frame=  595 fps= 34 q=28.0 size=    3136kB time=00:00:21.84 bitrate=1176.1kbits/s    
  
  frame=  611 fps= 34 q=28.0 size=    3240kB time=00:00:22.48 bitrate=1180.5kbits/s    
  
  frame=  630 fps= 34 q=28.0 size=    3351kB time=00:00:23.24 bitrate=1181.2kbits/s    
  
  frame=  651 fps= 34 q=28.0 size=    3451kB time=00:00:24.08 bitrate=1174.1kbits/s    
  
  frame=  675 fps= 34 q=28.0 size=    3528kB time=00:00:25.04 bitrate=1154.2kbits/s    
  
  frame=  700 fps= 35 q=28.0 size=    3612kB time=00:00:26.04 bitrate=1136.2kbits/s    
  
  frame=  724 fps= 35 q=28.0 size=    3701kB time=00:00:27.00 bitrate=1122.9kbits/s    
  
  frame=  747 fps= 35 q=28.0 size=    3808kB time=00:00:27.92 bitrate=1117.4kbits/s    
  
  frame=  768 fps= 35 q=28.0 size=    3884kB time=00:00:28.76 bitrate=1106.4kbits/s    
  
  frame=  799 fps= 36 q=28.0 size=    3983kB time=00:00:30.00 bitrate=1087.6kbits/s    
  
  frame=  834 fps= 36 q=28.0 size=    4052kB time=00:00:31.40 bitrate=1057.1kbits/s    
  
  frame=  868 fps= 37 q=28.0 size=    4097kB time=00:00:32.76 bitrate=1024.5kbits/s    
  
  frame=  894 fps= 37 q=28.0 size=    4141kB time=00:00:33.80 bitrate=1003.6kbits/s    
  
  frame=  914 fps= 37 q=28.0 size=    4234kB time=00:00:34.60 bitrate=1002.5kbits/s    
  
  frame=  933 fps= 37 q=28.0 size=    4363kB time=00:00:35.36 bitrate=1010.8kbits/s    
  
  frame=  954 fps= 37 q=28.0 size=    4442kB time=00:00:36.20 bitrate=1005.3kbits/s    
  
  frame=  976 fps= 37 q=28.0 size=    4510kB time=00:00:37.08 bitrate= 996.3kbits/s    
  
  frame=  994 fps= 37 q=28.0 size=    4579kB time=00:00:37.80 bitrate= 992.3kbits/s    
  
  frame= 1010 fps= 37 q=28.0 size=    4663kB time=00:00:38.44 bitrate= 993.7kbits/s    
  
  frame= 1030 fps= 37 q=28.0 size=    4734kB time=00:00:39.24 bitrate= 988.3kbits/s    
  
  frame= 1043 fps= 37 q=28.0 size=    4843kB time=00:00:39.76 bitrate= 997.9kbits/s    
  
  frame= 1065 fps= 37 q=28.0 size=    5021kB time=00:00:40.64 bitrate=1012.1kbits/s    
  
  frame= 1092 fps= 38 q=28.0 size=    5052kB time=00:00:41.72 bitrate= 991.9kbits/s    
  
  frame= 1118 fps= 38 q=28.0 size=    5129kB time=00:00:42.76 bitrate= 982.6kbits/s    
  
  frame= 1145 fps= 38 q=28.0 size=    5185kB time=00:00:43.84 bitrate= 968.8kbits/s    
  
  frame= 1174 fps= 38 q=28.0 size=    5214kB time=00:00:45.00 bitrate= 949.1kbits/s    
  
  frame= 1202 fps= 39 q=28.0 size=    5256kB time=00:00:46.12 bitrate= 933.7kbits/s    
  
  frame= 1220 fps= 39 q=28.0 size=    5341kB time=00:00:46.84 bitrate= 934.1kbits/s    
  
  frame= 1236 fps= 38 q=28.0 size=    5432kB time=00:00:47.48 bitrate= 937.2kbits/s    
  
  [h264 @ 0x2d68ca0] A non-intra slice in an IDR NAL unit.
  
  [h264 @ 0x2d68ca0] decode_slice_header error
  
  frame= 1252 fps= 38 q=28.0 size=    5552kB time=00:00:48.12 bitrate= 945.2kbits/s    
  
  frame= 1269 fps= 38 q=28.0 size=    5666kB time=00:00:48.80 bitrate= 951.2kbits/s    
  
  frame= 1286 fps= 38 q=28.0 size=    5773kB time=00:00:49.48 bitrate= 955.7kbits/s    
  
  frame= 1302 fps= 38 q=28.0 size=    5908kB time=00:00:50.12 bitrate= 965.7kbits/s    
  
  frame= 1324 fps= 38 q=28.0 size=    6011kB time=00:00:51.00 bitrate= 965.6kbits/s    
  
  frame= 1349 fps= 38 q=28.0 size=    6103kB time=00:00:52.00 bitrate= 961.4kbits/s    
  
  frame= 1373 fps= 38 q=28.0 size=    6200kB time=00:00:52.96 bitrate= 959.1kbits/s    
  
  frame= 1399 fps= 39 q=28.0 size=    6284kB time=00:00:54.00 bitrate= 953.3kbits/s    
  
  frame= 1424 fps= 39 q=28.0 size=    6388kB time=00:00:55.00 bitrate= 951.5kbits/s    
  
  frame= 1447 fps= 39 q=28.0 size=    6492kB time=00:00:55.92 bitrate= 951.1kbits/s    
  
  frame= 1476 fps= 39 q=28.0 size=    6530kB time=00:00:57.08 bitrate= 937.2kbits/s    
  
  frame= 1503 fps= 39 q=28.0 size=    6580kB time=00:00:58.16 bitrate= 926.8kbits/s    
  
  frame= 1518 fps= 39 q=28.0 size=    6709kB time=00:00:58.76 bitrate= 935.4kbits/s    
  
  frame= 1542 fps= 39 q=28.0 size=    6835kB time=00:00:59.72 bitrate= 937.6kbits/s    
  
  [h264 @ 0x3348440] data partitioning is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
  
  [h264 @ 0x3348440] If you want to help, upload a sample of this file to ftp://upload.ffmpeg.org/incoming/ and contact the ffmpeg-devel mailing list. (ffmpeg-devel@ffmpeg.org)
  
  frame= 1568 fps= 39 q=28.0 size=    6958kB time=00:01:00.76 bitrate= 938.1kbits/s    
  
  frame= 1596 fps= 39 q=28.0 size=    7006kB time=00:01:01.88 bitrate= 927.5kbits/s    
  
  frame= 1619 fps= 39 q=28.0 size=    7096kB time=00:01:02.80 bitrate= 925.6kbits/s    
  
  frame= 1646 fps= 40 q=28.0 size=    7152kB time=00:01:03.88 bitrate= 917.2kbits/s    
  
  frame= 1671 fps= 40 q=28.0 size=    7205kB time=00:01:04.88 bitrate= 909.8kbits/s    
  
  frame= 1698 fps= 40 q=28.0 size=    7268kB time=00:01:05.96 bitrate= 902.7kbits/s    
  
  frame= 1725 fps= 40 q=28.0 size=    7328kB time=00:01:07.04 bitrate= 895.5kbits/s    
  
  frame= 1752 fps= 40 q=28.0 size=    7382kB time=00:01:08.12 bitrate= 887.7kbits/s    
  
  frame= 1779 fps= 40 q=28.0 size=    7433kB time=00:01:09.20 bitrate= 879.9kbits/s    
  
  frame= 1803 fps= 40 q=28.0 size=    7580kB time=00:01:10.16 bitrate= 885.1kbits/s    
  
  frame= 1827 fps= 41 q=28.0 size=    7643kB time=00:01:11.12 bitrate= 880.4kbits/s    
  
  frame= 1852 fps= 41 q=28.0 size=    7703kB time=00:01:12.12 bitrate= 875.0kbits/s    
  
  frame= 1879 fps= 41 q=28.0 size=    7751kB time=00:01:13.20 bitrate= 867.4kbits/s    
  
  frame= 1899 fps= 41 q=28.0 size=    7840kB time=00:01:14.00 bitrate= 867.9kbits/s    
  
  frame= 1918 fps= 41 q=28.0 size=    7946kB time=00:01:14.76 bitrate= 870.7kbits/s    
  
  frame= 1938 fps= 41 q=28.0 size=    8046kB time=00:01:15.56 bitrate= 872.3kbits/s    
  
  frame= 1959 fps= 41 q=28.0 size=    8134kB time=00:01:16.40 bitrate= 872.1kbits/s    
  
  frame= 1978 fps= 41 q=28.0 size=    8227kB time=00:01:17.16 bitrate= 873.5kbits/s    
  
  frame= 1997 fps= 41 q=28.0 size=    8322kB time=00:01:17.92 bitrate= 874.9kbits/s    
  
  frame= 2022 fps= 41 q=28.0 size=    8390kB time=00:01:18.92 bitrate= 870.9kbits/s    
  
  [h264 @ 0x2d64180] concealing 1320 DC, 1320 AC, 1320 MV errors in I frame
  
  [mp4 @ 0x2cdb900] Starting second pass: moving the moov atom to the beginning of the file
  
  frame= 2041 fps= 40 q=-1.0 Lsize=    8657kB time=00:01:21.56 bitrate= 869.5kbits/s    
  
  video:8633kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.275387%
  
  [libx264 @ 0x2d99e00] frame I:9     Avg QP:18.32  size: 48212
  
  [libx264 @ 0x2d99e00] frame P:698   Avg QP:22.05  size:  9056
  
  [libx264 @ 0x2d99e00] frame B:1334  Avg QP:27.18  size:  1562
  
  [libx264 @ 0x2d99e00] consecutive B-frames: 10.6%  5.0%  5.4% 79.0%
  
  [libx264 @ 0x2d99e00] mb I  I16..4: 18.4% 57.3% 24.2%
  
  [libx264 @ 0x2d99e00] mb P  I16..4:  5.3%  8.2%  1.0%  P16..4: 26.3%  9.1%  4.0%  0.0%  0.0%    skip:46.0%
  
  [libx264 @ 0x2d99e00] mb B  I16..4:  0.2%  0.1%  0.0%  B16..8: 20.6%  1.8%  0.3%  direct: 0.8%  skip:76.2%  L0:38.8% L1:57.6% BI: 3.6%
  
  [libx264 @ 0x2d99e00] 8x8 transform intra:56.1% inter:75.9%
  
  [libx264 @ 0x2d99e00] coded y,uvDC,uvAC intra: 35.0% 44.9% 12.4% inter: 6.5% 8.1% 0.2%
  
  [libx264 @ 0x2d99e00] i16 v,h,dc,p: 34% 40%  3% 22%
  
  [libx264 @ 0x2d99e00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 36% 26% 16%  3%  4%  4%  5%  4%  4%
  
  [libx264 @ 0x2d99e00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 28% 41% 10%  2%  4%  4%  5%  3%  3%
  
  [libx264 @ 0x2d99e00] i8c dc,h,v,p: 47% 24% 24%  5%
  
  [libx264 @ 0x2d99e00] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 0x2d99e00] ref P L0: 72.8% 10.0% 13.7%  3.5%
  
  [libx264 @ 0x2d99e00] ref B L0: 90.8%  7.9%  1.2%
  
  [libx264 @ 0x2d99e00] ref B L1: 96.5%  3.5%
  
  [libx264 @ 0x2d99e00] kb/s:866.17

• A *hot* Piwik Community Meetup 2015 !

  10 août 2015 — Community

  Last weekend I arrived in Germany to attend the Piwik Community Meetup 2015 and now I am in Poland. I joined Piwik PRO back in May as enterprise support project coordinator in North America. I am now writing this from the Piwik PRO main office in Wrocław, where I’ll be working from for the next two weeks.

  The meetup was HOT in every sense ! Berlin temperatures reached 35 degrees (celsius), as I finally meet in person several long-time, dedicated Piwik community contributors.

  

  Meetup preparation in Berlin, photo by M. Zawadziński, licensed under CC-BY-SA 4.0

  Pictures from the meetup preparation sessions
  

  In the first leg of my trip I was in Berlin to meet Piwik community members and Piwik PRO staff to prepare for the 2015 annual Piwik community meetup. These are my notes taken during the meeting at the request of one of my colleagues. I also relayed live on Framasphère, Twitter and IRC.

  

  Community discussion at the meetup, photo by D.Czajka, licensed under CC-BY-SA 4.0

  More pictures from the Piwik meetup
  

  This was harder than I expected, as I took notes with my laptop, pictures with my phone, wrote live to social media (using the Android Diaspora Native Web App), and used my laptop to relay on IRC. Going forward this requires better preparation, I was glad I had a few links and pictures ready before hand but it really requires intense focus to achieve this. I am glad presenters were patient when I requested repeating some of the ideas they shared. I am also a bit disappointed not much happened in IRC.

  Two day preparation sessions

  The discussions and session we had during the two days prior to the meetup are available here.

  We gathered in rented apartments in Berlin, this reminded me very much of similar community gatherings and perhaps of BarCamp and, at a much smaller scale, UDS sessions.

  

  Piwik Pizza !, photo by F. Rodríguez, licensed under CC-BY-SA 4.0

  A list of ideas of topics was initially submitted, we then proceeded to have scheduled sessions for open discussion. Several people shared their concern there was no possible remote participation which led to making public the Trello boards used/linked here.

  Note : The Trello links below still have action items and notes that are pending bug report / feature requests filing which should happen over the coming weeks. Most importantly, many action items will need identifying leads for different community team including Translations and Documentation, and better coordination of coming community engagement.

  Monday sessions consisted of the following subjects :

  • What are Piwik values & how to communicate them ? (see below for details)
  • How to encourage and recognize new external contributors ?
  • How could we double the Piwik userbase ?
  • How Community can organise help resources

  On Tuesday we met again to discuss the following subjects :

  • Piwik Long Term support (LTS)
  • How do Piwik.org (project) and Piwik PRO (company) sit together / are organized ? – An important part of this session was about having better communication channels and improving the new team page (bug #8520 and bug #8519, respectively)
  • Improving usability of Piwik e.g. for new users – this last session was not held has we ran out of time and prepared to go to the meetup venue.

  Some more details about individual preparation sessions

  What are Piwik values & how to communicate them ?

  The main subjects in this session were important changes proposed in the project mission and values. This was edited directly on on the wiki page on GitHub, some of the changes can be seen by comparing revisions.

  Piwik mission statement (bug #7376)

  “To create the leading Free and open source analytics platform, and to support global organisations and communities to keep full control over their data.”

  Our values

  • Openness
  • Freedom
  • Transparency
  • Data ownership
  • Privacy
  • Kaizen (改善) : continuous improvement

  This was also presented by Matthieu Aubry at the meetup and is published in the Roadmap page. Bringing more visibility and perhaps having a top page for Mission and Values was also brought up.

  Meetup agenda and notes

  The official agenda is available here.

  Many Piwik PRO employees stayed in Berlin for the meetup, and we had good participation although less than last year in Munich as my colleagues told me. Some were consultants, others staff from public organizations, universities, etc. In retrospect considering the very hot weather and summer holidays the attendance was good. I was very happy to arrive at the beautiful Kulturbrauerei and enter the air-conditioned Soda Club. T-Shirts were waiting for all attendees and free drinks (non-alcohol !) were welcome