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• C++/CLI — 0xc000007b (INVALID_IMAGE_FORMAT) with /clr option on

  9 mars 2015, par OverMachoGrande

  I’m trying to build a C++/CLI executable to which I statically link ffmpeg (libavcodec, libavformat, libavutil & swscale). It works fine if I build it normally (without /clr, so no CLR support), it works. However, when I add CLR support, it won’t start up with a 0xc000007b. A "Hello World" C++/CLI app runs fine, though.

  Supposedly the same thing happens with Boost::Threads, but since ffmpeg is pure C, I doubt it’s using Boost.

  My config :

  • Visual Studio 2008 Professional SP1
  • Windows XP Pro SP3 (x86)
  • .NET Framework 3.5 SP1

  Thanks,
  Robert

• Real time livestreaming - RPI FFmpeg and H5 Player

  29 avril 2022, par Victor

  I work at a telehealth company and we are using connected medical devices in order to provide the doctor with real time information from these equipements, the equipements are used by a trained health Professional.

  


  Those devices work with video and audio. Right now, we are using them with peerjs (so peer to peer connection) but we are trying to move away from that and have a RPI with his only job to stream data (so streaming audio and video).

  


  Because the equipements are supposed to be used with instructions from a doctor we need the doctor to receive the data in real time.

  


  But we also need the trained health professional to see what he is doing (so we need a local feed from the equipement)

  


  How do we capture audio and video

  


  We are using ffmpeg with a go client that is in charge of managing the ffmpeg clients and stream them to a SRS server.
This works but we are having a 2-3 sec delay when streaming the data. (rtmp from ffmpeg and flv on the front end)

  


  ffmpeg settings :

  


  ("ffmpeg", "-f", "v4l2", `-i`, "*/video0", "-f", "flv", "-vcodec", "libx264", "-x264opts", "keyint=15", "-preset", "ultrafast", "-tune", "zerolatency", "-fflags", "nobuffer", "-b:a", "160k", "-threads", "0", "-g", "0", "rtmp://srs-url")


  


  My questions

  


  

  • Is there a way for this set up to achieve low latency (<1 sec) (for the nurse and for the doctor) ?

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  • Is the way I want to achieve this good ? Is there a batter way ?

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  Flow schema

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  Data exchange and use case flow :

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  Note : The nurse and doctor use HTTP-FLV to play the live stream, for low latency.

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• Does anyone know any filters for better low quality video ?

  7 septembre 2022, par kasten

  So maybe my question can be closed, but anyway I'm researching and looking for a tool that can do the following with video files :

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  Here's an example of what I want :

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  When you put a low quality video on your TV and look into a mirror that reflects that image, it appears to be sharper, acting as a filter to improve the video.

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  I don't know if anyone has thought of this fact or if there is a software that does something similar. I know low quality video can't get any better, but why is there an improvement when looking in the mirror ?

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  I appreciate if anyone can comment, as I'm not a professional in video.

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