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• Piwik PRO is hiring a Technical Support Specialist (Remote)

  13 mars 2015, par Piwik Core Team — 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 Technical Support Specialist !

  What will you be doing ?

  • Supporting Piwik PRO clients on a daily basis – providing rapid responses via phone and email.
  • Participating in calls with Piwik PRO clients analyzing requirements for enterprise customers.
  • Onboarding clients – planning and coordinating the implementation with the dedicated technical team.
  • Communicating complex problems to the dedicated technical team.

  We can promise you :

  • A competitive salary.
  • The opportunity to develop your skills and gain more experience by working on exceptional projects.
  • Access to a regularly updated resource library and the opportunity to contribute to it.
  • Flexible working hours.

  Desired Skills and Experience

  You won’t make it without :

  • A solid technical background and a familiarity with the IT sector.
  • A receptive mind.
  • Great English communication skills (speaking, reading, writing, and listening).
  • Previous experience of working with corporate clients and a sixth sense for striking up relationships.
  • Appropriately mixed abilities : solid communication skills, inquisitiveness and an analytical mind (have the ability to draw conclusions based on gathered data).
  • Great self-organization skills.

  About Piwik PRO

  At Piwik and Piwik PRO we develop the leading open source web analytics platform, used by over 1.1M websites worldwide and is currently ranked the 7th most used web analytics tool in the world. 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.

  Piwik PRO provides cloud hosting solutions and enterprise-level support and consultancy services. We’re in the process of expanding our US team and are currently seeking to hire a Technical Support Specialist who will focus on assisting our US clients.

  Location

  Ideally you will be located in the USA or Canada (Remote work).

  Apply online

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

• avutil : add hwcontext_amf.

  15 octobre 2024, par Dmitrii Ovchinnikov

  avutil : add hwcontext_amf.
  Adds  hwcontext_amf, enabling a shared AMF context for encoders,
  
  decoders, and AMF-based filters, without copy to the host memory.
  
  Code also was tested in HandBrake.
  Benefits :
  
   - Optimizations for direct video memory access from CPU
  
   - Significant performance boost in full AMF pipelines with filters
  
   - Integration of GPU filters like VPP, Super Resolution, and
  
      Compression Artefact Removal(in future plans)
  
   - VCN power management control for decoders.
  
   - Ability to specify which VCN instance to use for decoding
  
     (like for encoder)
  
   - AMD will soon introduce full AMF API for multimedia accelerator MA35D
  
     - With AMF API, integration will be much easier :
  
        GPU and the accelerator will have the same API
  
     - including encoder, decoder, scaler, color converter,
  
        Windows and Linux.
  
     Learn more :
  
        https://www.amd.com/en/products/accelerators/alveo/ma35d.html
  Changes by versions :
  
  v2 : Header file cleanup.
  
  v3 : Removed an unnecessary class.
  
  v4 : code cleanup and improved error handling
  
  v5 : Fixes related to HandBrake integration.
  
  v6 : Sequential filters error and memory leak have been fixed.
  

  • [DH] libavutil/Makefile
  • [DH] libavutil/hwcontext.c
  • [DH] libavutil/hwcontext.h
  • [DH] libavutil/hwcontext_amf.c
  • [DH] libavutil/hwcontext_amf.h
  • [DH] libavutil/hwcontext_amf_internal.h
  • [DH] libavutil/hwcontext_internal.h
  • [DH] libavutil/pixdesc.c
  • [DH] libavutil/pixfmt.h

• Making a movie out of pictures in correct order

  6 novembre 2022, par astrogab

  Short version

  


  How can one combine files img1000.png, img5000.png, img10000.png, img11000.png in the right order into a movie ?

  


  Longer version

  


  I am using ffmpeg to make a movie out of snapshots of a simulation. There should be for instance 5 images per second. The names are :

  


  image0200.png
image0300.png
image0400.png
image0500.png
image1000.png
image1500.png
image2000.png
...
image8500.png
image9000.png
image9500.png
image10000.png
image15000.png


  


  i.e., they are sequential but there are irregular gaps in the numbers. The numbers are formatted according to '%04d' but go above 9999. I have tried

  


  ffmpeg -y -loglevel debug -nostats \
-r:v 5 -thread_queue_size 1024 -f image2 \
-pattern_type glob -i "*[0-9][0-9][0-9][0-9].png" \
-r:v 30 -preset veryslow -pix_fmt yuv420p -crf 28 \
-an  AMDG.mp4


  


  and many, many other variations but either only two frames end up being visible in the movie (even though the images are found when using -debug) or only the files up to image9500.png are used (and glob does not seem to allow [0-9]{4,} as for regex), or, with

  


      ffmpeg -y -loglevel debug -nostats \
    -r:v 5 \
    -thread_queue_size 1024 -f image2 -pattern_type glob \
       -i "image[0-9][0-9][0-9][0-9].png" \
    -r:v 5 \
    -thread_queue_size 1024 -f image2 -pattern_type glob \
       -i "image[1-9][0-9][0-9][0-9][0-9].png" \
    -r:v 30 -preset veryslow -pix_fmt yuv420p -crf 28 \
    -map 0 -map 1 \
    -an  AMDG.mp4


  


  there are apparently two streams in the output movie and only one of them is being played. (I realised in the process -map 0 -map 1 was needed in order for both input streams to be used.)

  


  In one of the variations of options I found (now I have lost what it was exactly !) all images were included but the order was not the desired one : image1000.png was shown before image10000.png. Apparently a newer version of ffmpeg (I have ffmpeg version 3.4.8-0ubuntu0.2) has the ability to sort like sort -V, so that image10000 come after image1000, but reinstalling ffmpeg is in general not a practical option. Also renaming the files is not practical and creating e.g. soft links with sequential names in the format '%05d' starting at 0 and in steps of 1 (so that -i '%05d' could be used) is of course not elegant.

  


  With the -concat filter as in https://unix.stackexchange.com/questions/77016/ffmpeg-pattern-type-glob-not-loading-files-in-correct-order, i.e.,

  


    ffmpeg -y -loglevel debug -nostats -r:v 5 \
    -thread_queue_size 1024 -f image2 -f concat \
    -safe 0 -i <(find . -maxdepth 1 -regex 'image*.png' \
       -exec echo "file $(pwd)/"{} \; | sort -V) \
    -r:v 30 -codec:v libx264 -preset veryslow -pix_fmt yuv420p -crf 28 \
    -an \
    AMDG.mp4


  


  the processing took a long time and made the whole system sluggish, while producing a movie of 60 kB showing only two different images.

  


  I have the impression that there are several issues at once... Thanks if you can help !