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• How can I download a video with url beginning with blob:https://…

  11 août 2017, par iMax

  I would like to know if it is possible to download a video from a URL beginning with blob :

  blob:https://www.xyz123…

  i would prefer a terminal solution (ffmpeg ?, youtube-dl ?). but i have not found anything on the world wide web.

  Again : I have the url of the video stream, which looks like the above. How can I download the complete video ?

  Update

  Ok. I now found a webpage which allowed me to download the video file I wanted :
  https://video-download.online/

  But I am still wondering if there is a Terminal solution for downloading video with blob-URL (like in arte mediathek [ example arte ] or in zdf mediathek [ example zdf ]).

  Does nobody know how to do it ?

• FFMPEG bat file won't run [closed]

  8 octobre 2023, par Tiecubed

  @echo off
setlocal enableextensions enabledelayedexpansion

set "input_directory=C:\Users\tiecu\OneDrive\Desktop\testing environment\Pending"
set "output_directory=C:\Users\tiecu\OneDrive\Desktop\testing environment\Output"

for %%i in ("%input_directory%.mp4") do (
    set "input_file=%%i"
    set "output_file=!output_directory!%%~nxi"

    C:\ffmpeg\ffmpeg.exe -i "!input_file!" -map_metadata -1 -vf "rotate=2PI/180, vignette=1.1, scale=1200:-1,setsar=1,crop=1080:1920,setpts=PTS/1.1" -af "atempo=1.1" -c:v libx264 -crf 18 -c:a aac -strict experimental "!output_file!"
)


  


  I have tried many bat scripts, all of them work except ffmpeg ones. The terminal opens and immediately closes. I have tried many scripts. ffmpeg works fine via cmd without a batch script. I'm entirely lost. It was working fine earlier, then in the middle of making the script it stopped working. So I went back to the previous working script and it would no longer work. Terminal opens and immediately closes.

  


• Convert Transparent PNGs to a Transparent Video

  15 février 2023, par Aurora7979

  I have a set of transparent PNG pictures, and I want to convert them into a video with transparent background (play the PNGs continuously).

  


  First, I used ffmpeg with the terminal command :

  


  ffmpeg -framerate 30 -pattern_type glob -i '*.png' \-c:v libx264 -pix_fmt yuva420p out.mp4


  


  And I learnt that the codec libx264 does not compatible with the alpha channel. Then, I changed to another codec and used the following command :

  


  ffmpeg -framerate 30 -pattern_type glob -i '*.png' \-c:v libvpx-vp9 -pix_fmt yuva420p out.mp4


  


  However, QuickTime Player cannot play the resulting out.mp4. I don't know if it was because the video conversion failed or it was the fault of QuickTime Player. The terminal didn't show any error message, though.

  


  Therefore, I would like to ask :

  


  


  1. Which codec I should use to create a transparent video that a normal video player can play ?

     


  


  2. Can the output MP4 video format support transparent videos ?

     


  


  3. If there is another tool that is far more superior than ffmpeg for my purpose, I am willing to give it a try.

     


  


  


  Thank you for any advice.

  


  All the best,

  


  Aurora