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• Is it possible to download files (MP4) from external server and convert it to MP3 in NodeJS

  19 mai 2021, par GrayGalaxy

  I am currently working on a chrome extension to download songs from JioSaavn.com. In my implementation I use an Vercel instance as a prox. This is a workaround for CORS error in the extension. The server code is shown as below.

  


  const axios = require('axios')
module.exports = (req, res) => {
    res.setHeader('Access-Control-Allow-Origin', '*')
    res.setHeader('Cache-Control', 's-maxage=300, stale-while-revalidate')
    const URL = req.url // requested url
    // get array buffer
    if (url === '/') return res.redirect('https://github.com/GrayGalaxy/jiosaavn-downloader')

    let server_url = `https://snoidcdnems02.cdnsrv.jio.com/c.saavncdn.com/${URL}`
    axios.get(src_url, { responseType: 'arraybuffer' })
        .then(r => r.data)
        .then(result => res.send(result))
        .catch(() => {
            res.status(400).send('Cannot access the requested URL')
        })
    }
}



  


  This outputs a MP4 file (just with audio). As for example if you put /983/01100b84f61ca8b3a0432f12c564be8e_96.mp4 as the URL parameter it will output as MP4.

  


  Now I want to convert that response MP4 to a MP3 file. I tried ffmpeg, fluent-ffmpef and many other implementation. Most of them dose not support ArrayBuffer as an input (I think) it doesn't provide any output as expected. Or it might possible Vercel does not allow file-browser.

  


  Please give a solution to that.

  


• ffmpeg, download video stream from url

  5 juillet 2021, par samiullah

  I am developing application to save any online webinar(video or audio) given the url using ffmpeg library. Url usually contain other contents like text, images as well. So i have problem, how to separately get video stream from url using ffmpeg(or some other better free library). Url may be for any site, not only for youtube, but as an example, link may be like

  


  http://www.youtube.com/watch?v=wnrJJYm7qIw

  


• lavf : allow custom IO for all files

  16 janvier 2016, par Anton Khirnov

  lavf : allow custom IO for all files
  Some (de)muxers open additional files beyond the main IO context.
  
  Currently, they call avio_open() directly, which prevents the caller
  
  from using custom IO for such streams.
  This commit adds callbacks to AVFormatContext that default to
  
  avio_open2()/avio_close(), but can be overridden by the caller. All
  
  muxers and demuxers using AVIO are switched to using those callbacks
  
  instead of calling avio_open()/avio_close() directly.
  (de)muxers that use the URLProtocol layer directly instead of AVIO
  
  remain unconverted for now. This should be fixed in later commits.
  

  • [DBH] doc/APIchanges
  • [DBH] libavformat/avformat.h
  • [DBH] libavformat/dashenc.c
  • [DBH] libavformat/hdsenc.c
  • [DBH] libavformat/hls.c
  • [DBH] libavformat/hlsenc.c
  • [DBH] libavformat/img2dec.c
  • [DBH] libavformat/img2enc.c
  • [DBH] libavformat/internal.h
  • [DBH] libavformat/mov.c
  • [DBH] libavformat/movenc.c
  • [DBH] libavformat/options.c
  • [DBH] libavformat/segment.c
  • [DBH] libavformat/smoothstreamingenc.c
  • [DBH] libavformat/utils.c