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• How to publish your plugin or theme on the Piwik Marketplace – Introducing the Piwik Platform

  25 septembre 2014, par Thomas Steur — Community, Development

  This is the next post of our blog series where we introduce the capabilities of the Piwik platform. Over the last weeks we have already introduced you to some of the basics on how to create plugins and themes. This time you’ll learn how to publish a plugin or theme on the Piwik Marketplace to share it with all Piwik users.

  What is the Piwik Marketplace ?

  The Marketplace is a showcase for all plugins and themes that can be used in Piwik. You can browse them either on a standalone website or in Piwik itself by going to Settings => Marketplace. There you can install and update them with just one click. Easy as that ! While some of those plugins are provided by Piwik or Piwik PRO most of them are created and maintained by our community. Everyone is very welcome to distribute plugins or themes on the Marketplace.

  Prerequisites

  To publish your plugin on the Marketplace you simply need to meet these requirements :

  • The plugin name is not already taken by another plugin
  • The code of the plugin is hosted in a public GitHub repository
  • The GitHub service “Piwik plugins” for this repository is enabled (Repository Settings => Webhooks & Services => Add Service)
  • Push permission for this repository
  • The plugin is free (as in not paid)
  • The license must be compatible with the GNU General Public License v3 or any later version

  There is also list of Rules for plugins.

  Best practices

  Before actually distributing your plugin we recommend to follow a couple of best practices to make sure your plugin looks good on the Marketplace and provides useful information for your future users. If you have used the console to generate a plugin the needed files were already created for you.

  Provide a good description

  Make sure there is a file named README.md in the root of your plugin. When preparing your plugin for the Marketplace we will search for four sections in this file : Description, FAQ, Changelog and Support. Each of those is optional but it is good practice to provide at least a section Description and Support by prefixing them with ## . Any content of your readme outside of those sections will not be displayed on the Marketplace.

  # Piwik Plugin Name
  
  
  
  ## Description
  
  
  
  Add your plugin description here.
  
  
  
  ## Support
  
  
  
  Please direct any feedback to hello@piwik.org. 
  
  If you experience any issues feel free to file an issue at https://github.com/piwik/piwik/issues .

  A good example can be seen in the README.md of the CustomAlerts plugin and the related CustomAlerts plugin page.

  Provide screenshots

  This will improve your appearance in the Marketplace a lot and users will be more likely install your plugin. It is as easy as placing “png” or “jpg” files in a folder named screenshots. The filename of each image will be shown in the UI with underscores replaced by a whitespace. This way you can provide a nice description. Have a look at the CustomAlerts plugin to see how it works.

  Provide contact details

  Your contact details are specified in the plugin.json file of your plugin root folder. Providing at least one author and a link to your homepage is required. If you do not have a website you can use a link to your GitHub profile. This helps your users contact you in case they want to thank you for your great work or if they have any problem with it. An example plugin.json looks like this :

  {
  
      "name": "MyPluginName",
  
      "homepage": "http://piwik.org",
  
      "authors": [
  
          {
  
              "name": "Piwik",
  
              "email": "hello@piwik.org",
  
              "homepage": "http://piwik.org"
  
          }
  
      ],
  
      "support": {
  
        "email": "hello@piwik.org",
  
        "issues": "https://github.com/piwik/piwik/issues",
  
        "forum": "http://forum.piwik.org",
  
        "wiki": "https://github.com/piwik/piwik/wiki",
  
        "irc": "#piwik-dev"
  
      } 
  
  }

  Choose a license

  Choosing the right license that works best for you and your users is important. To distribute a plugin via the Piwik Marketplace the license must be compatible with the GNU General Public License v3 or any later version. If you do not specify a license anywhere in your plugin, it is assumed your plugin uses GPLv3 or later. The license must be specified in the plugin.json file using the property license :

  {
  
      "name": "MyPluginName",
  
      "license": "GPL v3+"
  
  }

  Provide donation links

  You can define a donation link or email for PayPal, Flattr and Bitcoin in the plugin.json file. Users that love your work will then be able to donate you money directly from the plugin page.

  {
  
      "name": "MyPluginName"
  
      "donate": {
  
          "paypal": "sponsor@piwik.org",
  
          "flattr": "https://flattr.com/profile/piwik",
  
          "bitcoin": "1234567890"
  
      }
  
  }

  How to publish the first version of your plugin

  We are trying to make it as easy as possible for you to publish your plugin on the Marketplace. That’s why we don’t require any logins or packaging. To publish your plugin you only have to create a new tag of your plugin and within a minute your plugin will be ready to be installed on hundreds of thousands of Piwik installations.

  To tag your plugin you can use one of the following two suggestions :

  Using the command line

  git tag 0.1.0 && git push --tags

  Where “0.1.0” is the name of the tag. While you can use any tag name it is best practice to use the current version number as defined in the plugin.json file.

  Using GitHub UI

  To tag a new version via GitHub click on Releases => Draft a new release.

  

  Now you can enter a tag name (version) and press “Publish release” as shown in this screen. That’s it !

  

  How to provide an update for your plugin

  To provide an update you only have to increase the version number in the file plugin.json and create another tag as explained in the previous section. Your new Plugin update will be visible on the Marketplace within a minute or so. It might take a bit longer until the update appears in Piwik itself as each Piwik server only checks for updates every few hours.

  For a complete list of information go to our Distributing Your Plugin guide in the Piwik Developer Zone.

  If you have any feedback regarding our APIs or our guides in the Developer Zone feel free to let us know.

• ffmpeg mp4 x264 encoding -> playback causes "pending" in both crome and IE causing 10+ seconds delay

  29 septembre 2014, par user1978645

  After encoding a video to mp4(x264 with aac) ; I have the following weird behaviour in both crome and IE :

  Im serving the content from https with spdy enables.

  It takes up to 30 seconds before the video is actually played, in the mean time i cannot reload the page it shows up as "pending". (even after i have visual on the video sometimes it takes 10-20 seconds before i can actually reload the page, or navigate to another url on the same domain)

  After looking at the "network" tab in developer tools, i see the following requests for 1 page/video :

  Path        Method Status   Type         Initiator   Size/content  Time/latency
  
  video.mp4   GET    206 OK   video/mp4    other       32.3KB/32.0kb  600ms/339MS 
  
  video.mp4   GET    206 OK   video/mp4    other       123kb/123b     21.85s/21.46s
  
  video.mp4   GET    206 OK   video/mp4    other       7.1MB/7.2MB    1.4min/2ms

  I tried to isolate the problem, When i use an mp4 video from the internet (for example the demo video of jplayer) and load it from my server, it loads rapidly, without delays.

  So it makes me think the problem lies within the encoding. I tried various things.
  FFmpeg :

  • csr 69 (low quality)

  • various options

  HTML :

  • preload="none"

  • javascript loading/playing of the movie

  • type=’mp4/video’

  • no posterimage

  But i cannot resolve the problem. Does anyone have a clue what is causing this ?

  I have a download speed of 300kb/s and the movie is 6MB.

  After the video starts, the video isn’t fully buffered, so i wonder : What is the html5 videoplayer doing all this time ?

  The problem also blocks the connections. When i press "F5" in both chrome and IE the page beeing reloaded comes up in the network tab as "pending" and it can take 10 to 20 seconds before the page actually reloads.

  ffmpeg command : (i used various commands but this is just 1 example which causes the problem)

  /root/bin/ffmpeg    -threads 1 -y  -i /home/flirtzo/public_html//userfiles/files/94e76a18a7838e62ecb23cf0c374b1b798e7b936  -threads 0 -codec:a libfdk_aac -b:a 128k  -vf "scale=-2:320" -preset veryslow -vcodec h264 -acodec aac -strict -2  /home/flirtzo/public_html/userfiles/files/b2/72/695f4eba95169a3f29564bf9571c703b05f1b5974f5156da633eb139c80a1575452e2858dfc61cc82bfca02d2b156aa64d4503695756481dc2a5d1c673a4cdea-94e76a18a7838e62ecb23cf0c374b1b798e7b936.mp4

  Output :

  ffmpeg version git-2014-04-16-c150e2c Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Sep 28 2014 21:08:17 with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-4)
  
    configuration: --prefix=/root/ffmpeg_build --extra-cflags=-I/root/ffmpeg_build/include --extra-        ldflags=-L/root/ffmpeg_build/lib --bindir=/root/bin --extra-libs=-ldl --enable-gpl --enable-nonfree -    -enable-libfdk_aac --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-    libx264
  
    libavutil      52. 76.100 / 52. 76.100
  
    libavcodec     55. 58.103 / 55. 58.103
  
    libavformat    55. 37.100 / 55. 37.100
  
    libavdevice    55. 13.100 / 55. 13.100
  
    libavfilter     4.  4.100 /  4.  4.100
  
    libswscale      2.  6.100 /  2.  6.100
  
    libswresample   0. 18.100 /  0. 18.100
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Input #0, mpeg, from         '/home/flirtzo/public_html//userfiles/files/94e76a18a7838e62ecb23cf0c374b1b798e7b936':
  
    Duration: 00:00:25.97, start: 0.340078, bitrate: 29004 kb/s
  
      Stream #0:0[0x1e0]: Video: mpeg1video, yuv420p(tv), 352x240 [SAR 200:219 DAR 880:657], 1150     kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 29.97 tbc
  
      Stream #0:1[0x1c0]: Audio: mp2, 44100 Hz, stereo, s16p, 224 kb/s
  
  [libx264 @ 0x2b189c0] using SAR=1199/1314
  
  [libx264 @ 0x2b189c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  
  [libx264 @ 0x2b189c0] profile High, level 1.3
  
  [libx264 @ 0x2b189c0] 264 - core 142 r2 d6b4e63 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 -     http://www.videolan.org/x264.html - options: cabac=1 ref=2 deblock=1:0:0 analyse=0x3:0x113 me=hex     subme=4 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0     deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=12 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=1 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0     rc_lookahead=20 rc=crf mbtree=1 crf=51.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to     '/home/flirtzo/public_html/userfiles/files/b2/72/695f4eba95169a3f29564bf9571c703b05f1b5974f5156da633e    b139c80a1575452e2858dfc61cc82bfca02d2b156aa64d4503695756481dc2a5d1c673a4cdea-    94e76a18a7838e62ecb23cf0c374b1b798e7b936.mp4':
  
    Metadata:
  
      encoder         : Lavf55.37.100
  
      Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 320x218 [SAR 1199:1314        DAR 880:657], q=-1--1, 30k tbn, 29.97 tbc
  
      Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo, fltp, 128 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mpeg1video -> libx264)
  
    Stream #0:1 -> #0:1 (mp2 -> aac)
  
  Press [q] to stop, [?] for help
  
  frame=16127 fps=786 q=-1.0 Lsize=   10559kB time=00:08:58.12 bitrate= 160.7kbits/s dup=12 drop=0
  
  video:1586kB audio:8410kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead:     5.638589%
  
  [libx264 @ 0x2b189c0] frame I:109   Avg QP:50.58  size:   494
  
  [libx264 @ 0x2b189c0] frame P:9537  Avg QP:51.00  size:   138
  
  [libx264 @ 0x2b189c0] frame B:6481  Avg QP:51.00  size:    40
  
  [libx264 @ 0x2b189c0] consecutive B-frames: 21.8% 72.1%  5.4%  0.7%
  
  [libx264 @ 0x2b189c0] mb I  I16..4: 46.1% 53.9%  0.0%
  
  [libx264 @ 0x2b189c0] mb P  I16..4:  6.0%  6.1%  0.0%  P16..4: 12.7%  1.1%  0.1%  0.0%  0.0%        skip:74.1%
  
  [libx264 @ 0x2b189c0] mb B  I16..4:  0.1%  0.1%  0.0%  B16..8:  6.3%  0.0%  0.0%  direct: 0.7%      skip:92.9%  L0:38.6% L1:61.2% BI: 0.2%
  
  [libx264 @ 0x2b189c0] 8x8 transform intra:50.8% inter:85.6%
  
  [libx264 @ 0x2b189c0] coded y,uvDC,uvAC intra: 5.9% 39.5% 0.1% inter: 0.1% 1.0% 0.0%
  
  [libx264 @ 0x2b189c0] i16 v,h,dc,p: 56% 30%  7%  7%
  
  [libx264 @ 0x2b189c0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 12% 11% 62%  3%  3%  3%  3%  2%  2%
  
  [libx264 @ 0x2b189c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19%  5% 73%  2%  0%  0%  0%  0%  2%
  
  [libx264 @ 0x2b189c0] i8c dc,h,v,p: 97%  1%  2%  0%
  
  [libx264 @ 0x2b189c0] Weighted P-Frames: Y:5.5% UV:2.7%
  
  [libx264 @ 0x2b189c0] ref P L0: 64.8% 35.2%
  
  [libx264 @ 0x2b189c0] ref B L0: 75.2% 24.8%
  
  [libx264 @ 0x2b189c0] ref B L1: 99.3%  0.7%
  
  [libx264 @ 0x2b189c0] kb/s:24.13
  
  ffmpeg version git-2014-04-16-c150e2c Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Sep 28 2014 21:08:17 with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-4)
  
    configuration: --prefix=/root/ffmpeg_build --extra-cflags=-I/root/ffmpeg_build/include --extra-    ldflags=-L/root/ffmpeg_build/lib --bindir=/root/bin --extra-libs=-ldl --enable-gpl --enable-nonfree -    -enable-libfdk_aac --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-    libx264
  
    libavutil      52. 76.100 / 52. 76.100
  
    libavcodec     55. 58.103 / 55. 58.103
  
    libavformat    55. 37.100 / 55. 37.100
  
    libavdevice    55. 13.100 / 55. 13.100
  
    libavfilter     4.  4.100 /  4.  4.100
  
    libswscale      2.  6.100 /  2.  6.100
  
    libswresample   0. 18.100 /  0. 18.100
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Input #0, mpeg, from     '/home/flirtzo/public_html//userfiles/files/94e76a18a7838e62ecb23cf0c374b1b798e7b936':
  
    Duration: 00:00:25.97, start: 0.340078, bitrate: 29004 kb/s
  
      Stream #0:0[0x1e0]: Video: mpeg1video, yuv420p(tv), 352x240 [SAR 200:219 DAR 880:657], 1150         kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 29.97 tbc
  
      Stream #0:1[0x1c0]: Audio: mp2, 44100 Hz, stereo, s16p, 224 kb/s
  
  [libx264 @ 0x300d9c0] using SAR=200/219
  
  [libx264 @ 0x300d9c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  
  [libx264 @ 0x300d9c0] profile High, level 2.2
  
  [libx264 @ 0x300d9c0] 264 - core 142 r2 d6b4e63 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 -                     http://www.videolan.org/x264.html - options: cabac=1 ref=16 deblock=1:0:0 analyse=0x3:0x133 me=umh         subme=10 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=24 chroma_me=1 trellis=2 8x8dct=1 cqm=0     deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=1 sliced_threads=0 nr=0     decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=8 b_pyramid=2 b_adapt=2 b_bias=0     direct=3 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0     rc_lookahead=60 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     '/home/flirtzo/public_html/userfiles/files/b2/72/73d4a3245c0b0e174ab7ce0f872ba3f649f8b93f73a6deeab364    4a994009d73638ce61aecc7dc2e0250c4e74ff2d9a4d479ed35cef26b3f6e1a77e8bf5938518-    94e76a18a7838e62ecb23cf0c374b1b798e7b936.mp4':
  
    Metadata:
  
      encoder         : Lavf55.37.100
  
      Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 352x240 [SAR 200:219     DAR 880:657], q=-1--1, 30k tbn, 29.97 tbc
  
      Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo, fltp, 128 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mpeg1video -> libx264)
  
    Stream #0:1 -> #0:1 (mp2 -> aac)
  
     Press [q] to stop, [?] for help
  
  frame=16127 fps= 88 q=-1.0 Lsize=   29190kB time=00:08:58.12 bitrate= 444.4kbits/s dup=12 drop=0
  
  video:20221kB audio:8410kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead:     1.954086%
  
  [libx264 @ 0x300d9c0] frame I:73    Avg QP:24.31  size:  8024
  
  [libx264 @ 0x300d9c0] frame P:4399  Avg QP:26.97  size:  2600
  
  [libx264 @ 0x300d9c0] frame B:11655 Avg QP:32.51  size:   745
  
  [libx264 @ 0x300d9c0] consecutive B-frames:  3.8%  5.0% 27.2% 18.4%  8.4% 33.9%  1.7%  0.7%  0.9%
  
  [libx264 @ 0x300d9c0] mb I  I16..4: 10.8% 68.5% 20.7%
  
  [libx264 @ 0x300d9c0] mb P  I16..4:  2.9%  7.5%  0.8%  P16..4: 45.1% 18.4% 12.4%  0.5%  0.1%        skip:12.3%
  
  [libx264 @ 0x300d9c0] mb B  I16..4:  0.6%  1.3%  0.1%  B16..8: 40.1%  8.7%  1.7%  direct: 2.1%      skip:45.5%  L0:47.2% L1:41.7% BI:11.1%
  
  [libx264 @ 0x300d9c0] 8x8 transform intra:66.7% inter:76.7%
  
  [libx264 @ 0x300d9c0] direct mvs  spatial:99.9% temporal:0.1%
  
  [libx264 @ 0x300d9c0] coded y,uvDC,uvAC intra: 60.3% 75.8% 16.4% inter: 17.3% 16.8% 0.6%
  
  [libx264 @ 0x300d9c0] i16 v,h,dc,p: 16% 27% 11% 47%
  
  [libx264 @ 0x300d9c0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 13% 13% 18%  6%  9%  9% 11%  9% 11%
  
  [libx264 @ 0x300d9c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 13% 15%  7%  7% 14% 14% 13%  8% 10%
  
  [libx264 @ 0x300d9c0] i8c dc,h,v,p: 26% 32% 20% 22%
  
  [libx264 @ 0x300d9c0] Weighted P-Frames: Y:10.1% UV:6.9%
  
  [libx264 @ 0x300d9c0] ref P L0: 40.6% 12.1% 10.0%  5.2%  5.2%  4.7%  4.6%  3.0%  2.5%  2.1%  1.9%      1.8%  1.7%  1.7%  1.6%  1.3%
  
  [libx264 @ 0x300d9c0] ref B L0: 71.4%  5.6%  3.2%  3.0%  3.1%  2.8%  2.5%  1.8%  1.3%  1.0%  1.1%      1.2%  1.0%  0.7%  0.5%
  
  [libx264 @ 0x300d9c0] ref B L1: 96.3%  3.7%
  
  [libx264 @ 0x300d9c0] kb/s:307.82

• JavaCV in Android : FFmpegFrameGrabber Class not found exception

  30 septembre 2014, par Sunshinetpu

  I want to create a video from images. So I tried to import JavaCV into Android project with the following guide :
  http://javacv4android.blogspot.com/2014/02/how-to-import-javacv-libraries-to.html
  But I have got error
  FFmpegFrameGrabber Class not found exception
  I don’t know how to fix the problem.
  Can any body help me ?
  Thanks a lot for advices.