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• Linux : Create a file for writing with controlled flushing to disk in large chunks [closed]

  12 août 2023, par Pete

  On Linux I have a process (ffmpeg) that writes very slowly (even slower than 1kb / s sometimes) to disk. Ffmpeg can buffer this to 256kb chunks that get written infrequently but ffmpeg hangs occasionally and if I try to detect these hangs by checking that the file is being updated I need to wait a long time between updates, up to 10 or 15 mins, otherwise I can sometimes mistakenly kill the ffmpeg process when it appears to have stopped writing when it fact its still filling its internal buffer.

  


  Theres no way to detect this it seems unless I use strace (that I can find anyway). So I am wondering about turning off buffering in ffmpeg and writing unbuffered to disk from ffmpeg.

  


  This will result in the disk constantly making tiny writes and wasting power (and probably, if I use a SSD, mess with wear levelling too).

  


  So I would like to make ffmpeg write to a 'virtual file' (in memory - either kernel memory or a process) which I can specify the flushing characteristics of. The idea being to perhaps specify flush every 2 minutes, then I can keep an eye on the file size and make sure its still being written.

  


  I don't think I've missed any other ways to do this job - even if I could watch the socket stream incoming to ffpmeg the process itself could still stop writing and lose data. Doing the buffering outside of ffmpeg seems like the best way.

  


  Is there a built in way to do this in Linux or does it mean a custom process ? I guess I know how to do this with a small C program and pipe the data in but I wonder if theres a neater way.

  


• Piwik Analytics becomes Matomo to reflect Users’ Privacy Focus

  10 janvier 2018, par Matomo Core Team

  One of the world’s leading analytics software platforms is changing its name. Piwik is the sixth most-used web and mobile analytics computer solution worldwide. It is now changing its name to Matomo.

  The name change comes after 10 years of Piwik building its top analytics software, with great success. It is already used on over one million websites in more than 170 countries. Matomo will build on that success, and focus even more on privacy.

  ‘Privacy has become a huge concern worldwide’, says Matomo’s creator, Matthieu Aubry. ‘Privacy legislation is being developed in Europe, and we will be ahead of the game in being ready for those changes. We’ll grow in line with the law and regulation changes.’

  Matomo will lead the way in openness and transparency for its users. Its new name means honesty in Japanese.
  ‘Matomo will always be free and community-driven, just as Piwik was’, says Matthieu Aubry. ‘We have worked with hundreds of people to create the best open digital analytics solution in the world. We’re committed to giving every user full control of their data.’

  The change of name is appropriate as the Matomo platform moves into a new stage of growth. But for its community, little will obviously change. The same people will still be involved, and users will still get useful data to improve their own website. That data includes who visits their site, what they do there, how long they stay, and what they buy.
  Matomo is an all-in-one analytics solution that gives companies a 360 degree view of their users.

  ‘They can grow their business while still keeping 100% ownership of their data, and being fully compliant with privacy laws’, says Matthieu Aubry. ‘We’re more motivated than ever to building on that, so that Matomo stays ahead of the pack.’

  The platform can be fully customised with hundreds of plug-ins, integrations and configurations.

  Matomo’s updated website and new logo is now available on https://matomo.org.
  For further information, please contact the Matomo Team on hello@matomo.org

  The post Piwik Analytics becomes Matomo to reflect Users’ Privacy Focus appeared first on Analytics Platform - Matomo.

• avdevice/decklink : use boolean for list_devices option

  19 novembre 2020, par Limin Wang

  avdevice/decklink : use boolean for list_devices option
  For the document(indevs.texi and outdevs.texi) used it as boolean.
  Reviewed-by : Marton Balint <cus@passwd.hu>
  
  Signed-off-by : Limin Wang <lance.lmwang@gmail.com>
  

  • [DH] libavdevice/decklink_dec_c.c
  • [DH] libavdevice/decklink_enc_c.c