download progress slows down with filter of audioonly

[its-me-ilia]

I am converting youtube video to mp3 and then letting user download it but if

 ytdl(url,{
      filter: 'audioonly'
  })
  .pipe(res)

there is audioonly filter it downloading progress slows down. for example it video is length of 4:15, mp4 downloads size of 3x MB in five-six seconds and if it is audioonly size of 5MB, it takes 10-15sec or more. how can i fix this? here is full code:

ytdl.getInfo(url, (err,info)=>{
       res.header('Content-Disposition', 'attachment; filename="'+ transliterate(info.title) 
 +'.mp3"');
       ytdl(url,{
          filter: 'audioonly'
       })
       .pipe(res)
})

[RocoGreen]

Use quality instead

  ytdl.getInfo(url, (err,info)=>{
   res.header('Content-Disposition', 'attachment; filename="'+ transliterate(info.title) 
   +'.mp3"');
   ytdl(url,{
      quality: 'highestaudio'
   })
   .pipe(res)
   })

[its-me-ilia]

@RocoGreen it still slows down progress

[RocoGreen]

@its-me-ilia Did you try a connexion test ?
And what is the video your trying to download ?

[its-me-ilia]

@RocoGreen https://www.youtube.com/watch?v=SDTZ7iX4vTQ&list=RDSDTZ7iX4vTQ&start_radio=1

[RocoGreen]

@its-me-ilia Try with https://www.youtube.com/watch?v=SDTZ7iX4vTQ&list=RDSDTZ7iX4vTQ
Did you try a connection test ?

[its-me-ilia]

@RocoGreen It still does the same with link you provided, no need for connection test because it works same way in other devices

[fent]

rate limiting is done by youtube

[omarroth]

See @fent's comment in #294. Also related: pytube/pytube#247 and the linked issue ytdl-org/youtube-dl#15271.

It should be possible to bypass rate-limiting by downloading in chunks of <~10MB.

[fent]

It should be possible to bypass rate-limiting by downloading in chunks of <~10MB.

is this true? I may be able to split it up within ytdl-core

[omarroth]

There's some more details in the linked issues, but in most cases I have found that chunking helps with download speeds.

The relevant code in youtube-dl is here, or here for Invidious.

[its-me-ilia]

@omarroth can you show me the snippet how can i donwload in chunks?