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• lavu/hwcontext_qsv: Update after adding support for VAAPI on Windows

  14 April 2023, by Sil Vilerino

  lavu/hwcontext_qsv: Update after adding support for VAAPI on Windows
   qsv_internal.h: Remove unnecessary include va_drm.h
  
   qsv_internal.h: Enable AVCODEC_QSV_LINUX_SESSION_HANDLE on Linux/VA only
  
   hwcontext_qsv.c: Do not allow child_device_type VAAPI for Windows until
  
    support is added, keep D3D11/DXVA2 as more prioritary defaults.
  Initial review at https://github.com/intel-media-ci/ffmpeg/pull/619/
  Signed-off-by: Sil Vilerino <sivileri@microsoft.com>
  
  Reviewed-by: Dmitry Rogozhkin <dmitry.v.rogozhkin@intel.com>
  
  Reviewed-by: Wu, Tong1 <tong1.wu@intel.com>
  

  • [DH] libavcodec/qsv_internal.h
  • [DH] libavutil/hwcontext_qsv.c

• How to record a video conference (e.g skype, oovoo, ...) with a program written in C#

  13 August 2014, by Matin Lotfaliee

  I want to record screen (a video conference e.g skype, oovoo, ...) with a program written in C#. I searched a lot about how to do this:

  • Here suggests Windows Media Encoder, but none of their samples work correctly on my Win7. I installed the SDK but even the links to Microsoft are somehow broken or old.
  • Here suggests creating a video stream from a series of screenshots using ffmpeg. but it is probably impossible to keep the audio,mic and screenshots synced.
  • Here suggests creating a GIF file, but it does not support audio which is important to me.
  • Here suggess using Gallio framework, but I was unable to find where the usable DLL for recording is.
  • Here seems to be a great solution but it is not free...

  Compression is not important to me because a video conference uses CPU a lot.

  Can you help me find a good and easy solution with references?

• MPEG DASH : Playing video segments from .m4s files instead of byte ranges in the MPD File using Simple DASH Player

  1 November 2018, by Trycoder

  I have followed the tutorial from the link below to create an MPEG DASH player using HTML5 and javascript.
  Building a simple MPEG dash player using HTML5 and JS.

  In the given tutorial, it is possible to play the video segments using byte ranges. But for my application, I need the following features.

  1. The video player should read the .m4s segment files and play the video instead of byte ranges.
  2. The amount of data in the MediaSource buffer should be calculated periodically, also the amount of space left in the buffer.

  Are these possible in the given player or Is there a better MPEG DASH Player with the above features?

  PS: The MPD File is created using FFmpeg.

  ffmpeg  -f  avfoundation -video_size 1280x720 -framerate 30 -i 0 -vcodec libx264  -acodec aac  -b:v 800k  -f dash  -use_template 0  -min_seg_duration 4000 -single_file 1  -start_at_zero -live 1  ffmpeg.mpd

  Also, I tried using the DASH.js player but the documentation is very vast in it. Can we get the size of the source buffer in dash.js (The space available in the source buffer and also the amount of space filled)? This is the main feature which is required for my project.

  Edit :
  Code which I tried