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• Downloading individual songs from YouTube playlist [closed]

  23 août 2024, par user26961371
  

  • I've created a custom script using yt-dlp.

  


  • The script takes a single argument, which is the actual playlist URL.

  


  • I'm using the following command :

  


  


  yt-dlp --extract-audio --audio-format mp3 --yes-playlist -o "/Users/$USER/Desktop/%(id)s.%(ext)s" --embed-chapters $1


  


  Try :
I've run the command with a valid playlist URL, but it's downloading each song from the playlist into a single MP3 file for each song. I want to download each song as an individual file, not the entire playlist in a single file 15 times.

  


  Expectation :
I expect yt-dlp to download each song from the playlist as a separate MP3 file, rather than combining all songs into a single MP3 file for each song.

  


  Context :
The issue is likely due to the use of the --yes-playlist option, which tells yt-dlp to treat the input as a playlist URL and download all songs in one go.
I've checked the official documentation for yt-dlp, but I couldn't find a solution.

  


• Significantly different scores when calculating VMAF for the whole video vs individual frames [closed]

  24 octobre 2024, par YG1992

  Suppose i have a raw video 'encoded_raw.yuv' and 'original_raw.yuv' on YUV420p. I am getting significantly different results when im calculating VMAF using both methods

  


  Method 1

  


  $ ffmpeg -s widthxheight -pix_fmt yuv420p -i .\encoded_raw.yuv -s widthxheight -pix_fmt yuv420p -i .\original_raw.yuv -lavfi libvmaf=log_path=vmaf_logfile.json:log_fmt=json -f null -


  


  versus Method 2 : extracting the png out of a single frame and computing the VMAF score for the individual frame

  


  $ ffmpeg -video_size widthxheight -i ./encoded_raw.yuv -vf select=eq(n\,1) -vframes 1 -pix_fmt yuv420p encoded_raw_1.png
$ ffmpeg -video_size widthxheight -i ./original_raw.yuv -vf select=eq(n\,1) -vframes 1 -pix_fmt yuv420p original_raw.png
$ ffmpeg -s widthxheight -pix_fmt yuv420p -i .\encoded_raw_1.png -s widthxheight -pix_fmt yuv420p -i .\original_raw.png -lavfi libvmaf=log_path=vmaf_logfile.json:log_fmt=json -f null -`


  


  method 1 vmaf at frame 1 from json = 80

  


  method 2 vmaf = 70

  


  any reason why this is so ?

  


  Note : for moduse this is on topic as this covers
-> software tools commonly used by programmers (ie ffmpeg)

  


• Recursively convert images in each subfolder into individual videos using FFmpeg

  17 décembre 2024, par arutan edram

  I am using this script to convert all images in a folder into a video. Each image is shown for 4 seconds and the script runs from a bat file.

  


  `ffmpeg -framerate 1/4 -i %%03d.jpg -pix_fmt yuv420p video.mp4`


  


  I have hundreds of subfolders each containing images with the same resolution and I want to convert them into one moive per subfolder.

  


  I might be close to a solution but it still does not do the job

  


  @echo off
setlocal enabledelayedexpansion

:: Set the frame rate and file format
set "framerate=1/4"
set "image_format=%%03d.jpg"
set "output_video=video.mp4"

:: Traverse all subfolders
for /d /r %%F in (*) do (
    echo Processing folder: %%F
    cd "%%F"
    :: Check if images exist
    if exist "%image_format%" (
        echo Converting images in %%F to video...
        ffmpeg -framerate %framerate% -i "%image_format%" -pix_fmt yuv420p "%%~nxF.mp4"
    ) else (
        echo No images found in %%F, skipping...
    )
    cd ..
)


  


  Any help is appreciated