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• How to process video stream ?

  27 avril 2016, par sharpener

  I would like to ask some experienced multimedia professional how to proceed with following task :

  Given URL provides video stream and we would like to get access to decoded frames (byte stream in memory) in managed Win7+ application (C#). We don’t want to render/present the frames the standard way. The video format is known but not fixed (might get changed between two successive sessions, but we will know the parameters).

  So far, I have found there are several methods and I have build following picture in my mind :

  1. ffmpeg wrapper
     • Pros
       1. Self contained (no dependency to windows technologies)
       2. Powerful
     • Cons
       1. Little more complex to understand
       2. Lot of different wrapping variants (FFmpeg.NET, ffmpeg-sharp, ffmpeg-shard, FFmpeg.AutoGen, ...)
  2. DirectShow wrapper
     • Pros
       1. Widely used/supported technology (variaous filters freely available)
       2. Nice/detailed documentation on MSDN
     • Cons
       1. Quite old
       2. Considered obsolete from the point of author’s view (available only for desktop model on runtime >= Win8)
  3. MediaFoundation wrapper
     • Pros
       1. Theoretical successor of DirectShow, so should be available in the future
     • Cons
       1. Seems to be not as good as DirectShow
       2. Not very popular, limited "community" support
  4. FFmpegInterop wrapper
     • Pros
       1. Microsoft’s open source wrapper alternative
     • Cons
       1. Not available for runtime < Win8

• ffmpeg : how to stream from rtmp to FLS ?

  21 juin 2016, par yarek

  I can create HLS from static MPEG4 using that command :

  ffmpeg -i video.mp4 -codec copy -map 0 -f segment -segment_list out.list -segment_time 10 out%03d.ts

  I am now trying to achieve that :

  live RTMP(FME)------->FFMEG-------------->HLS

  

  I tried with :

  ffmpeg -i rtmp://127.0.0.1:1935/live/video -codec copy -map 0 -f segment -segment_list out.list -segment_time 10 out%03d.ts

  But got error :

  Closing connection : NetStream.Play.StreamNotFound
  rtmp ://127.0.0.1:1935/live/video : Unknown error occurred

  Any idea how to achieve :

  RTMP---->FMPEG----->HLS ?

  I also tried :

  ffmpeg -i "rtmp://localhost:1935/live/yarek live=1" -codec copy -map 0 -f segment -segment_list out.list -segment_time 10 out%03d.ts

  Seems better but stucks :

  ble-zlib

  libavutil 52. 0.100 / 52. 0.100
  libavcodec 54. 69.100 / 54. 69.100
  libavformat 54. 35.100 / 54. 35.100
  libavdevice 54. 3.100 / 54. 3.100
  libavfilter 3. 20.106 / 3. 20.106
  libswscale 2. 1.101 / 2. 1.101
  libswresample 0. 16.100 / 0. 16.100
  libpostproc 52. 1.100 / 52. 1.100
  rtmp server sent error
  Metadata :
  videokeyframe_frequency8.00
  avclevel 31.00
  videodevice Microsoft LifeCam Cinema
  keywords
  width 320.00
  videodatarate 350.00
  presetname Custom
  copyright
  creationdate Mon Oct 29 17:51:08 2012
  videocodecid avc1
  author
  avcprofile 66.00
  title
  height 240.00
  description
  rating
  framerate 20.00

  Thanks

• winrt : multithreading support

  29 septembre 2015, par wang-bin

  winrt : multithreading support
  _beginthreadex is for desktop only. CreateThread is available for windows store apps on windows (and phone) 8.1 and later. http://msdn.microsoft.com/en-us/library/ms682453%28VS.85%29.aspx
  Signed-off-by : Matt Oliver <protogonoi@gmail.com>
  

  • [DH] compat/w32pthreads.h
  • [DH] configure
  • [DH] libavutil/cpu.c