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• FFmpeg code not working on http url for thumbnail extraction

  1er août 2014, par user2240379

  I am trying to extract thumbnail from sharepoint 2013 video library. I found a link which can extract using ffmpeg. this is the link :
  [How can I save first frame of a video as image ?

  filename = "http://siteurl/" + items["FileRef"].ToString();

  When i replaced the input file with sharepoint site url and video name then it does not produce any thumbnail. I also gives error on

  ffmpeg.Start();
  
          ffmpeg.WaitForExit();
  
          ffmpeg.Close()

  I would like to understand how make it work for http url.
  If it is not possible to use url in ffmpeg can anyone suggest another method to achieve thumbnail.(as i want the thumbnail to be set automatically using 1st frame from of video if it not set manually)

• Create MP4 file from HTTP packets received over network

  19 juin 2023, par Austin

  I have implemented a network recorder (proxy) specially for HTTP and Websocket. When a user access a link for an audio / video file (say mp4 format), I want to create a mp4 file since all the data passing through proxy.

  


  Whenever I detect mp4 data is present in HTTP response body, I uncompress the body (it could be zip or brotli compressed packet) and then write it to a file. So far I have implemented and it looks fine.

  


  Now when I try to play, it does not play which is obvious as it is not a proper mp4 format file. I want to know, how can I prepare a proper mp4 file from received HTTP response body. My first preference to use simple c/c++ code to create mp4 file. It it turns out to be lot of work I am open to use ffmpeg. Can somebody please help me what's the best approach here and any reference sample / example code ? 

  


• how to read a http video stream with libavcodec (ffmpeg)

  23 décembre 2011, par mwahab

  I'm trying to read a real-time http video stream (I've set one up using VLC and my webcam) using libavcodec from ffmpeg. so far I've been able to read an mpeg file fine but when I pass a url instead of the file name it hangs (I assume it's waiting for the end of the file).

  anyone have experience/ideas on how to do this ? I'm also open to alternatives if people have other suggestions.

  the end goal is to do live video-streaming on the iphone. apple's http live streaming has too much lag for what I need but that's for another post :)

  any help is greatly appreciated !