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• Youtube-dl : Download video with maximum FPS and change FPS using OpenCV

  8 mai 2021, par MmBaguette

  I'm trying to download a YouTube video using YouTube-dl and specifying a maximum FPS. I don't want the lowest FPS, but I also don't want an FPS higher than 30. The code below does not work, but it was my best attempt.

  


  ydl_opts = {
    'format': '(bestvideo[fps<30]/bestvideo)+bestaudio/best', # CHANGE FOR VIDEO
    'outtmpl': "youtube_video.%(ext)s",
}
print("Downloading YouTube video.")
                
with youtube_dl.YoutubeDL(ydl_opts) as ydl:
     ydl.download([text])


  


  If not, can I change the FPS of a video using OpenCV ? I tried using cap.set(cv2.CAP_PROP_FPS) but this doesn't work either.

  


  cap = cv2.VideoCapture(file)
fps = cap.get(cv2.CAP_PROP_FPS)
print(fps) # prints 60.0
cap.set(cv2.CAP_PROP_FPS)
fps = cap.get(cv2.CAP_PROP_FPS)
print(fps) # 60.0 again


  


• 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 TCP connection refused trying to download m3u8 file

  21 mai 2021, par Cyeole

  I'm trying to download a .m3u8 stream and convert it to mp4. The code I'm using is :

  


  ffmpeg -i "http://v030.url/s/1/6/8/168192d4db9f6a2d0247784d11bd3aaa/stream/480p/index.m3u8?h=f676f54bc54d0a97a591fb5122c85cfb&e=1621581127" -c copy -bsf:a aac_adtstoasc outputname.mp4


  


  However, I'm getting this error :

  


  [tcp @ 0x7fbdda504900] Connection to tcp://v030.url:80 failed: Connection refused
http://v030.url/s/1/6/8/168192d4db9f6a2d0247784d11bd3aaa/stream/480p/index.m3u8?h=f676f54bc54d0a97a591fb5122c85cfb&e=1621581127: Connection refused


  


  If I directly go to the link, it downloads the .m3u8 file without any problems and I've tried to convert this but it fails to read segments from the site. If I remove the "h=" and "e=" the link doesn't allow me to access the file.

  


  Can someone please guide me on how to download this file in ffmpeg ? It seems like it's protected. Cheers !

  


  I'm using ffmpeg on Mac OS X.