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• ffmpeg merge audio and video streams on the fly

  19 décembre 2022, par Kiko

  I'm trying to get a stream from Youtube and stream it via HTTP, but I have to use separate audio and video streams to get good quality. I don't know how to merge the streams on the fly with ffmpeg. (I'm using pytube)

  


  I know I can do this by saving the streams, then merging them, and then streaming the output, but I would like to do it on the fly. This is my current code (which uses the old progressive streams) :

  


  yt = YouTube(f"https://www.youtube.com/watch?v={url}")
video = yt.streams.filter(file_extension='mp4', progressive=True).first()
async def stream(response):
    for chunk in pytube_request.stream(video.url):
        await response.write(chunk)
return ResponseStream(stream, content_type="audio/mp4")


  


• yt-dlp and ffmpeg CLI : dynamically naming output file using ${}

  14 juin 2022, par garson

  I'm trying to dynamically name the output created by running yt-dlp and piping to ffmpeg for further processing. Ideally I'd also like to preserve other metadata from the Youtube in the output mp4 file.

  


  What I have tried (working example)

  


  yt-dlp "https://www.youtube.com/watch?v=PtkqwslbLY8" -o - | /
ffmpeg -i - -vcodec libx264 -crf 23 -preset fast -profile:v /
baseline -level 3 -refs 6 -vf "scale=640:-1,pad=iw:480:0:(oh-ih)/2,/
format=yuv420p" -acodec copy ${%(title)s}out.mp4


  


  What the current result is

  


  However, this just creates a file called out.mp4, without anything of the earlier video title in the file name.

  


  What I want the result to be

  


  I want the result to be a file called something like Jupiter_101_National_Geographicout.mp4 (based on the title of the Youtube Video).

  


• php streaming video : can tmp file be accessed before move_uploaded_file ?

  5 août 2019, par Jintor

  My question is about accessing file while they are being uploaded to the server.

  Can I perform "live" video streaming but BEFORE move_uploaded_file ???

  because move_uploaded_file have to wait until the video is completely finished.

  <?php
  
  // Can I access tmp before move_uploaded_file ?
  
  move_uploaded_file('tmp_name','new_location');

  Is there a way to access the tmp file during upload and perform ffmpeg ?

  I was considering upload by chunk via xhr request... but it seems .mp4 from a mobile don’t necessarily apply a fast start...

  how live streaming services companies do it ?

  ---

  **** More clarifications :
  Live streaming. Example User X take his phone and want to go live, he hit a button "stream yourself" than the camera starts recording and while uploading, the server begins to save it to the server and other users like Y, Z, A, B begin to watch while X is still begin live