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• fftools/ffmpeg_dec : move decoding to a separate thread

  2 juin 2023, par Anton Khirnov

  fftools/ffmpeg_dec : move decoding to a separate thread
  This is only a preparatory step to a fully threaded architecture and
  
  does not yet make decoding truly parallel - the main thread will
  
  currently submit a packet and wait until it has been fully processed by
  
  the decoding thread before moving on. Decoder behavior as observed by
  
  the rest of the program should remain unchanged. That will change in
  
  future commits after encoders and filters are moved to threads and a
  
  thread-aware scheduler is added.
  

  • [DH] fftools/ffmpeg.c
  • [DH] fftools/ffmpeg.h
  • [DH] fftools/ffmpeg_dec.c
  • [DH] fftools/ffmpeg_mux.c

• Remove flicker, crop and upscale in ffmpeg

  22 août 2024, par Sabha

  I spent one full day on ffmpeg line commands by searching a lot on google but could not achieve what I wanted to and therefore I came here to seek some advice.
I have a video testinput.mpg which I believe is a mpeg-2 video. It is of 720x576 dimensions having 25 fps and a total bitrate of 4224 kbps

  


  First problem is that the exported footage is flickering which I wasn't able to remove using ffmpeg with lots of commands I tried like adjusting brightness, contrast, hue, saturation and all.

  


  Second problem was to extract the center portion which I was able to do it with the crop feature using following command.

  


  ffmpeg -i testinput.mpg -filter:v "crop=468:374" testoutput.mpg


  


  But after cropping I observed that that bitrate fell from 4224 kbps to 761 kbps and I assume this has reduced the quality of video.

  


  What I want to achieve is :

  


  

  1. Crop the video properly keeping the same quality (acodec copy vcodec copy) -> ffmpeg did not allow me to do both the things together (cropping and having same codec)

  


  2. Remove the flicker from video and upscale it to 4K or HD quality so that it looks nice on big televison (preferably 4K)

  


  


  I request some help on how to achieve the desired result. Can someone shed some light on it ?

  


  Here are 10 seconds sample videos on google drive that I am working on

  


  testinput.mpg

  


  testoutput.mpg

  


  Thanks

  


• Piwik PRO is hiring a Project Coordinator (Job description)

  18 février 2015, par Matthieu Aubry — Jobs

  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. We are growing and now looking for a Project Coordinator !

  What will you be doing ?

  • Participating in calls with Piwik PRO clients and analyzing requirements for enterprise customers
  • Planning and coordinating the implementation of projects
  • Helping customers to improve and adjust data reporting methods to suit their needs
  • Functioning as the voice of the customer and provide internal feedback on how Piwik PRO can better serve our customers

  What do we expect from you ?

  • Fluent command of English (both in writing and speaking), confidence to communicate in formal conversations and a good knowledge of business English
  • Previous experience in working with corporate clients
  • Great communication skills
  • A proactive attitude and the ability to use your initiative
  • Ability to achieve goals without detailed instructions

  Possessing these assets would be an advantage :

  • Technical knowledge associated with using data analytics platforms
  • Data analysis and interpretation skills
  • Knowledge of German or French
  • Knowledge of Piwik Analytics

  What can you expect from us ?

  • Flexible cooperation
  • An attractive salary
  • The opportunity to develop your skills and gain more experience by working on exceptional projects
  • Multisport Card
  • Access to a regularly updated resource library and the opportunity to contribute to it
  • Flexible working hours
  • Unforgettable parties and integration trips
  • A completely unique work atmosphere – we really like to keep things informal

  Location

  We have offices in Poland and New Zealand, and Remote work is possible.

  Ideally you will be located in the USA or in Europe where most of our clients are based.

  Apply online

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