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• 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 !

• 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 !

• Encoding H.264 video using FFmpeg C API

  18 juillet 2014, par GummiB

  I’m trying to encode a H.264 video with the FFMPEG C API.
  I have successfully compiled and executed the decoding/encoding example provided by FFMPEG.

  The problem I’m facing is that the .mpg file (encoded with AV_CODEC_ID_MPEG1VIDEO) the example creates works. Windows creates a thumbnail and everything. On the other hand the .h264 (encoded with AV_CODEC_ID_H264) file does not. When I try to play the file in VLC the play/pause button just flickers, no thumbnail in windows, no nothing.

  During encoding libx264 reports the following :

  [libx264 @ 004b81a0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  
  [libx264 @ 004b81a0] profile High, level 1.3
  
  [libx264 @ 004b81a0] frame I:3     Avg QP:26.79  size:  2116
  
  [libx264 @ 004b81a0] frame P:12    Avg QP:26.60  size:   789
  
  [libx264 @ 004b81a0] frame B:10    Avg QP:31.39  size:   499
  
  [libx264 @ 004b81a0] consecutive B-frames: 20.0% 80.0%
  
  [libx264 @ 004b81a0] mb I  I16..4: 78.3% 11.6% 10.1%
  
  [libx264 @ 004b81a0] mb P  I16..4: 77.4%  0.6%  0.1%  P16..4: 20.3%  0.7%  0.9%  0.0%  0.0%    skip: 0.0%
  
  [libx264 @ 004b81a0] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  9.4%  0.2%  0.0%  direct:11.0%  skip:79.4%  L0:25.4% L1:35.4% BI:39.2%
  
  [libx264 @ 004b81a0] final ratefactor: 17.03
  
  [libx264 @ 004b81a0] 8x8 transform intra:3.4% inter:31.3%
  
  [libx264 @ 004b81a0] direct mvs  spatial:0.0% temporal:100.0%
  
  [libx264 @ 004b81a0] coded y,uvDC,uvAC intra: 4.4% 35.8% 1.6% inter: 1.3% 34.5% 9.5%
  
  [libx264 @ 004b81a0] i16 v,h,dc,p:  0%  0%  0% 100%
  
  [libx264 @ 004b81a0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu:  7% 20% 17% 49%  0%  0%  0%  1%  6%
  
  [libx264 @ 004b81a0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 14%  7% 18% 45%  2%  7%  2%  3%  2%
  
  [libx264 @ 004b81a0] i8c dc,h,v,p:  2%  6%  4% 88%
  
  [libx264 @ 004b81a0] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 004b81a0] ref P L0: 95.6%  1.6%  2.2%  0.5%  0.2%
  
  [libx264 @ 004b81a0] ref B L0: 67.5% 28.5%  3.2%  0.8%
  
  [libx264 @ 004b81a0] kb/s:166.45

  "ffprobe.exe test.h264 -show_streams" returns

  [STREAM]
  
  index=0
  
  codec_name=h264
  
  codec_long_name=H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
  
  profile=High
  
  codec_type=video
  
  codec_time_base=1/50
  
  codec_tag_string=[0][0][0][0]
  
  codec_tag=0x0000
  
  width=352
  
  height=288
  
  has_b_frames=1
  
  sample_aspect_ratio=0:1
  
  display_aspect_ratio=0:1
  
  pix_fmt=yuv420p
  
  level=13
  
  timecode=N/A
  
  id=N/A
  
  r_frame_rate=50/2
  
  avg_frame_rate=25/1
  
  time_base=1/1200000
  
  start_pts=N/A
  
  start_time=N/A
  
  duration_ts=N/A
  
  duration=N/A
  
  bit_rate=N/A
  
  nb_frames=N/A
  
  nb_read_frames=N/A
  
  nb_read_packets=N/A
  
  DISPOSITION:default=0
  
  DISPOSITION:dub=0
  
  DISPOSITION:original=0
  
  DISPOSITION:comment=0
  
  DISPOSITION:lyrics=0
  
  DISPOSITION:karaoke=0
  
  DISPOSITION:forced=0
  
  DISPOSITION:hearing_impaired=0
  
  DISPOSITION:visual_impaired=0
  
  DISPOSITION:clean_effects=0
  
  DISPOSITION:attached_pic=0
  
  [/STREAM]

  There you can see :

  start_time=N/A
  
  duration_ts=N/A
  
  duration=N/A

  I have tried countless changes to the AVCodecContext and multitude of parameters options to av_opt_set function. Still no luck getting a working H.264 video. I have even tried different builds of FFmpeg. No luck.

  I’m using the "FFmpeg git-0fb64da 32-bit Dev" build from Zeranoe and MinGw 4.7.2