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• Extract Video Meta Data from First Few MB on S3

  22 août 2016, par David Williams

  I have a large collection of video files on S3. I also have application servers running in AWS running a Java webapp. From those application servers, I would like to be able to extract metadata from each video file such as is provided by the Quicktime movie inspector :

  Source: /home/me/foo.mov
  
  Format: H.264, 1920x1080
  
  FPS: 29.97
  
  Data Size: 16.8 MB
  
  Data Rate: 6.70 Mbit/s

  Now, I can clearly get this information from ffmpeg :

  $ ffmpeg -i /home/me/foo.mov
  
  
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/me/foo.mov':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 1
  
      compatible_brands: isomavc1mp42
  
      creation_time   : 2014-06-30 22:40:08
  
    Duration: 00:00:20.02, start: 0.000000, bitrate: 6698 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 6696 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (default)
  
      Metadata:
  
        creation_time   : 2014-06-30 22:39:09
  
        handler_name    : GPAC ISO Video Handler

  I could easily parse out the equivalent fields to the Quicktime output ! But, this would require I have the file locally. Is it possible to do this from the first few MB (or some other mechanism) of a file hosted on S3 without downloading the whole thing locally ? The goal here is to extract the same fields as the quicktime inspector from a file on S3. Any ideas ?

• How can I use ffmpeg to stream over http

  19 juin 2014, par user3754828

  I am using the follow commands to stream to my localhost

  ffmpeg -i b.mp4 -r 60 -bufsize 1024k -vcode libtheora -qscale:v 1 -f ogg "udp://@127.0.0.1/video.ogg"
  
  
  
  ffmpeg -i b.mp4 -r 60 -bufsize 1024k -vcode libtheora -qscale:v 1 -f ogg "http://127.0.0.1/video.ogg"

  The both work very well, at least do not show any errors, but when I try play such http stream does not, it gave me error "not found"

  Can somebody help me on it ? I am complety lost in this issue...also when I try include some port, for example ffmpeg -i b.mp4 -r 60 -bufsize 1024k -vcode libtheora -qscale:v 1 -f ogg "http://127.0.0.1:8980/video.ogg" provide me input/output error...I have test the equivalent commands on vlc and is work as well.

  Thanks in advance

• Piwik is expanding ! We’re seeking a talented Software Engineer in New Zealand or in Poland

  13 mai 2014, par Matthieu Aubry — About, Community

  At Piwik and Piwik PRO we develop the leading open source web analytics platform, used by more than one million websites worldwide. Our vision is to build the best open alternative to Google Universal Analytics.

  The Piwik platform collects, stores and processes a lot of information : hundreds of millions of data points each month. We create intuitive, simple and beautiful reports that delight our users.

  Are you seeking a new challenge ? We are currently looking for a software engineer or software developer who is passionate about data processing, security, privacy, the open source philosophy and usable interface design.

  We practise agile methodology, test driven development, and fast release cycles. The main technologies we work with are Javascript (AngularJS, jquery), PHP5 and MySQL. You will write open source code that will directly benefit 250,000+ Piwik users in more than 200 countries and 50 languages.

  Responsibilities

  • Write server-side code (PHP5) and front-end code (Javascript) for Piwik platform.
  • Create robust high-volume production applications and develop prototypes quickly.
  • Tackle new problems as we continue to push technology forward.

  Minimum qualifications

  • BA/BS degree in Computer Science or equivalent practical experience.
  • 2 years of relevant work experience in software development.
  • Understanding of, and practical experience with PHP5 and Javascript application development.
  • Strong analytical and coding skills.
  • Excellent communication skills.

  Location

  • Wellington central, New Zealand.
    If you are not in New Zealand, and you are the right candidate, we will help you relocate here !
  • Wrocław, Poland

  Apply online

  To apply for this position, please Apply online here. We look forward to receiving your applications !