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• arm : add ff_int32_to_float_fmul_array8_neon

  3 décembre 2015, par Janne Grunau

  arm : add ff_int32_to_float_fmul_array8_neon
  Quite a bit faster than int32_to_float_fmul_array8_c calling
  
  ff_int32_to_float_fmul_scalar_neon through FmtConvertContext.
  
  Number of cycles per int32_to_float_fmul_array8 call while decoding
  
  padded.dts on exynos5422 :
                 before  after   change
  
  cortex-a7 :     1270     951    -25%
  
  cortex-a15 :     434     285    -34%
  checkasm —bench cycle counts :     cortex-a15   cortex-a7
  
  int32_to_float_fmul_array8_c :      1730.4       4384.5
  
  int32_to_float_fmul_array8_neon_c :  571.5       1694.3
  
  int32_to_float_fmul_array8_neon :    374.0       1448.8
  Interesting are the differences between
  
  int32_to_float_fmul_array8_neon_c and int32_to_float_fmul_array8_neon.
  
  The former is current behaviour of calling
  
  ff_int32_to_float_fmul_scalar_neon repeatedly from the c function,
  
  The raw numbers differ since checkasm uses different lengths than the
  
  dca decoder.
  

  • [DBH] libavcodec/arm/fmtconvert_init_arm.c
  • [DBH] libavcodec/arm/fmtconvert_neon.S

• Analytics for the Internet of Things : collecting all your things’ data with Piwik to stay in control ?

  25 novembre 2015, par Matthieu Aubry — About

  At Piwik our mission is to create the leading free and open source analytics platform, and supporting global organisations and communities to keep full control over their data.

  Our broad mission started 8 years ago and we focused at first helping people to liberate their website analytics data, then liberate their mobile app analytics data. But it is clear that there is much more than Web + Mobile : data is everywhere and a lot more data is being generated by software, people and their activities, robots, sensors…

  I’d like to share an interesting article which highlights one of the growing trends of technology : the rise of the Internet Of Things : 6 Ways Analytics And The Internet Of Things Will Transform Business.

  Here is an extract :

  The tech industry is no stranger to change, but the data derived from the IoT is taking disruption to a new level.

  At IBM’s Insight conference last month, Bob Picciano, senior vice president of IBM Analytics, talked about the rise of the “cognitive business”, or an enterprise that engages with analytics to improve its customer relations, business processes, and decision-making capabilities.

  There are dueling predictions over how ubiquitous the Internet of Things will be, but most indicate that the marketplace will host between 50 and 75 billion connected objects by 2020, signaling novel challenges for hardware manufacturing and development. Software engineers, likewise, may need to completely revamp programs to better exploit the influx of data, while innovators need to wrestle with the changes wrought by analytics.

  IBM’s Insight event unfolded in light of this wave of disruption. The lineup of corporate presenters converged on the same message : Analytics is for everyone, and your viability in the marketplace depends on it.

  […]

  IBM’s Insight 2015 conference sounded off on the most important trends in data usage and management. It also served a wake-up call for developers, engineers, and tech leaders. As the Internet of Things alters the landscape of analytics, hardware design needs to change, software development requires novel approaches, and tech management must become more agile in order to realize data’s greatest benefits.

  So far there are 1 million websites using Piwik… but what if there could be 10 or 50 million things (sensors, devices) being measured by Piwik ?

  Together we will be creating the best open source and generic analytics platform, that is engineered to last, and designed to help humanity keep control and gain Freedom.

  We aim for Piwik to be the ideal platform to measure the Internet Of Things.

  We’re still at the beginning of this journey and it will take the best of all of us to get there.

  See you on the way !

  PS : if you’d like to get involved with Piwik, we would be glad to welcome you !

• FFMPEG : Auto restart the script when stuck

  25 mai 2020, par F O X

  i'm running various scripts with ffmpeg like streaming on youtube, recording camera ip etc.
Sometimes my running scripts just stuck or stop working, there is no info about any errors or smth, they just got stuck, numbers doesn't change and i need to login to my server and click ctrl+z to stop it and then run it again.

  



  So... is there any way to make it automatic ?

  



  I tried many solutions founded in the web but most of them are based on errors but my scripts usually dont show any errors, they just stuck.

  



  I'm using Raspbian OS on Raspberry 3b+