/simple_ffmpeg_http_filter_server

Primary LanguageC

Simple HTTP server for testing FFmpeg http video filter

A simple server demonstrating ffmpeg "http" raw video remote frame filtering. This wiil help to postprocess frames outside of ffmpeg process.

Demo server for frames postprocess

// install required dependencies
npm i

// start server
npm run start

Start ffmpeg process with http filter

Run next command. Also, remember, that we need to escape url characters in command!

./ffmpeg -i input.mp4 -vf format=rgb24,http=url="http\\\://localhost\\\:3000/frame?param=abc" -t 10 -an -y out.mp4

After that, ffmpeg will be send every frame to url as post request for postprocessing frame and will be include additional info in request headers for every frame.

  frame_width: '1280',
  frame_height: '720',
  frame_pix_fmt: 'rgb24',
  frame_aspect_ratio: '1.000000'

Then you send frames back from server to ffmpeg process you must include new image params in request header, like that:

    //in this example we don't change image size or format, so we set original frame params
    res.header('frame_width',req.headers["frame_width"]);
    res.header('frame_height',req.headers["frame_height"]);
    res.header('frame_pix_fmt',req.headers["frame_pix_fmt"]);//yuv420p, rgb24, etc. (all ffmpeg supported pixel formats)