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• Python Youtube-dl convert to mp4

  27 mars 2021, par Church.exe

  (if it matters, I'm on windows)

  


  So I am trying to download a Youtube video in an Mp4 format (the program I am putting it into has limited compatibility) with audio but whatever I find online either doesn't work how people are saying it does (leading me to believe it is either outdated, missing context, or for a different OS) or is formatted in a way that doesn't make sense.

  


  My current code is :

  


  if PreferredOutput == 1:
    with youtube_dl.YoutubeDL({'format' : 'bestvideo+bestaudio[ext=m4a]/bestvideo+bestaudio/best', 'merge-output-format' : 'mp4'}) as ydl:
        ydl.download([url])


  


  but when I test it, it just seems to output the file as normal.(which I am guessing is the format the video file was uploaded to youtube as though I could be mistaken) What should I do/am I missing to make this only output (final) Mp4s ? (after the fact ffmpeg conversion or something similar is fine for my purposes)

  


• html text overlay with ffmpeg [closed]

  28 septembre 2020, par Tom

  I have a web page where a user can write html text with online editor tool, ckeditor.com. I want to overlay the html text to a video. My understanding is that ffmpeg doesn't support text overlay with html.

  


  Here are some possible options. I haven't tried any of them. I want to find out which is the better way to doing it.

  


  


  1. Parse the html text and convert it to text and settings that ffmpeg supports ? Is it doable ? How difficult is this ?

     


  


  2. Use puppeteer (server side rendering) to create a png image for image overlay. Would the font rendering on the server side matches 100% with the client side ?

     


  


  3. Someone suggests to do HTML->PDF->image using imagemagick + mpdf lib to image for image overlay. Many conversions are involved. Sound complex with many points of failure.

     


  


  


  Are there other better options ?

  


• What different video formats RTMP streaming support ?

  23 octobre 2019, par Padfoot

  In almost all the online references related to FFMPEG and RTMP, I am getting -f as flv. Is there any other formats.

  (I have tried avi, mpeg and h264, but no success.)

  Currently, I am running following command -

  ffmpeg -re -i video.mp4 -f s16le -ar 48000 -ac 2 -i audio.wav -c copy -f flv rtmp://192.168.0.1:1935/myapp/stream

  The issues with -f flv in my case are -

  • It doesn’t support 48k sample rate.
  • None of my input videos are in flv format (I have to convert it to flv externally).

  P.S. - I am using VLC as RTMP player.

  EDIT -

  I am getting following error with 48k audio file -

  [flv @ 0x5650ba7afb80] FLV does not support sample rate 48000, choose from (44100, 22050, 11025)