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• HTML5 video (mp4) won't seek properly with Firefox 37/38/39 on Apache

  10 juin 2015, par degenerate

  Edit : Turns out this is actually a Firefox bug.

  Firefox will not seek properly past the loaded point in any mp4. It doesn’t matter what program encoded the file or where it came from ! I am hosting on Apache 2.2.29

  Obvious things you will probably ask me :

  • Yes I used -movflags faststart when encoding with ffmpeg
  • Yes AddType video/mp4 .mp4 is set correctly
  • This is a new problem without any changes to the server ; only the newer firefox (version 36, 37, 38+) has this issue.
  • Chrome works WONDERFULLY so this is a problem isolated to Firefox, and only started happening sometime in 2015 with one of the newer versions. Nothing was changed on the server.

  Firefox makes hundreds of requests after seeking to any point in the mp4. The closer to the end of the file, the more requests are made. Eventually after several minutes it will stop sending requests and finish playing ; I assume when this happens it has downloaded the entire mp4.

  Notice the byte-range request on chrome has a definitive size, yet all the requests one firefox are XXXXXX- with no ending byte...

  (FIREFOX = BAD, hundreds of requests — right click image to see full resolution)

  

  (CHROME = GOOD, one single request)

  

  Regarding keep-alives : I tried turning keepalive on and off. I get the same results in both browsers. Chrome is always able to seek, firefox is never able to seek.

• Stopping Referrer Spam

  13 mai 2015, par Piwik Core Team — Community

  In this blog post we explain what is Referrer spam, this new kind of spam that has recently appeared on the Internet. We also provide solutions to stop it and preserve the quality of your analytics data.

  What is Referrer Spam ?

  Referrer spam (also known as log spam or referrer bombing) is a kind of spamming aimed at web analytics tools. A spammer bot makes repeated web site requests using a fake referrer URL to the site the spammer wishes to advertise.

  Here is an example of referrer spam in action :

  

  Half of those referrers are spams, here are some well know spammers that you may have seen in your logs : buttons-for-you-website.com, best-seo-offer.com, semalt.com…

  The benefit for spammers is that their website will appear in analytics tools like Piwik or Google Analytics :

  • public analytics reports (or logs) will be indexed by search engines : links to the spammer’s website will improve its ranking
  • curious webmasters are likely to visit their referrers, thus bringing traffic to the spammer’s website

  How to deal with Referrer Spam ?

  Referrer spam is still new and analytics tools are all handling it differently.

  Referrer Spam in Piwik

  At Piwik we started working on mitigating Referrer spam more than a year ago. If you use Piwik and keep it up to date, you do not need to do anything.

  Referrer spammers are automatically excluded from your reports to keep your data clean and useful.

  New spammers are continuously detected and added to Piwik’s blacklist on each update. If you find a new spammer in your analytics data, you can even report it so that it is added to the Piwik’s open referrer blacklist and blocked for everyone.

  Referrer Spam in Google Analytics

  Google Analytics doesn’t offer any spam protection by default. It can however be configured manually using a custom Filter.

  To create a filter in Google Analytics go to the Admin section and click on All Filters. Create a new custom filter that excludes based on the Campaign Source field. In the Filter pattern enter the spammers domains you want to exclude (this is a regular expression) :

  

  If new spammers arise you will need to update this list. You can also use Piwik’s referrer blacklist to exclude all the spammers currently detected.

  Other Analytics Tools

  Many web analytics tools do not yet handle Referrer spam and when using these tools, you will often find a lot of spam data in your Referrer Websites analytics reports.

  If you use an analytics tool that does not exclude Referrer spam, we recommend to contact the vendor and ask them to implement a mechanism to remove these referrer spammers. As of today many analytics vendors still have not mitigated this issue.

  Public List of Referrer Spammers

  At Piwik with the help of our large community we have decided to tackle this growing spam issue. We have created a list of up to date referrer spammers that anyone can edit.

  The list is available in a simple text file on Github : github.com/piwik/referrer-spam-blacklist.

  The list is released under the Public Domain and anyone can use it within their applications to exclude referrer spammers.

  Many people have already contributed new spammers to the list. We invite you to use the list in your apps and websites and help us keep the list up to date !

  Let’s unite and fight the spammers together.

  Happy Analytics !

• How to convert video to Archos compatible format ? (details below)

  19 mai 2015, par barrycarter

  EDIT : Rewriting completely to reflect what I’m actually trying to do.

  Below are the results of "ffmpeg -i" on two files that I know my
  Archos player will play properly.

  My question : what ffmpeg, vlc, mencoder, etc commands/options do I
  need to convert an existing video to either one of the two formats
  below ?

  In other words, how do I make non-Archos-compatible videos compatible
  with Archos ?

  (note : Archos has confirmed they no longer even sell plugins to view
  other types of videos, so transcoding is my only option)

  > ffmpeg -i Video\ 358\ -\ 24\ Jun\ 10,\ 00h00.AVI
  
  ffmpeg version 2.6.2 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.4.1 (GCC) 20090725 (Red Hat 4.4.1-2)
  
    configuration: --disable-yasm
  
    libavutil      54. 20.100 / 54. 20.100
  
    libavcodec     56. 26.100 / 56. 26.100
  
    libavformat    56. 25.101 / 56. 25.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 11.102 /  5. 11.102
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
  Guessed Channel Layout for  Input Stream #0.1 : stereo
  
  Input #0, avi, from 'Video 358 - 24 Jun 10, 00h00.AVI':
  
    Duration: 01:00:00.90, start: 0.000000, bitrate: 1893 kb/s
  
      Stream #0:0: Video: mpeg4 (Simple Profile) (DIVX / 0x58564944), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 1495 kb/s, 29.97 fps, 29.97 tbr, 29.97 tbn, 29.97 tbc
  
      Stream #0:1: Audio: adpcm_ima_wav ([17][0][0][0] / 0x0011), 48000 Hz, 2 channels, s16p, 384 kb/s
  
  At least one output file must be specified
  
  
  
  > ffmpeg -i /mnt/sshfs/MP4/8\ Out\ Of\ 10\ Cats/8\ Out\ Of\ 10\ Cats\ 6/8\ Out\ Of\ 10\ Cats\ s06e01.avi 
  
  ffmpeg version 2.6.2 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.4.1 (GCC) 20090725 (Red Hat 4.4.1-2)
  
    configuration: --disable-yasm
  
    libavutil      54. 20.100 / 54. 20.100
  
    libavcodec     56. 26.100 / 56. 26.100
  
    libavformat    56. 25.101 / 56. 25.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 11.102 /  5. 11.102
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
  [mpeg4 @ 0xa5deb80] Video uses a non-standard and wasteful way to store B-frames ('packed B-frames'). Consider using a tool like VirtualDub or avidemux to fix it.
  
  Input #0, avi, from '/mnt/sshfs/MP4/8 Out Of 10 Cats/8 Out Of 10 Cats 6/8 Out Of 10 Cats s06e01.avi':
  
    Metadata:
  
      encoder         : transcode-1.0.2
  
    Duration: 00:23:40.56, start: 0.000000, bitrate: 1028 kb/s
  
      Stream #0:0: Video: mpeg4 (Advanced Simple Profile) (XVID / 0x44495658), yuv420p, 640x352 [SAR 1:1 DAR 20:11], 886 kb/s, 25 fps, 25 tbr, 25 tbn, 25 tbc
  
      Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 48000 Hz, stereo, s16p, 128 kb/s
  
  At least one output file must be specified