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Miscellaneous FFmpeg scripts

Get notified when your video is available in 4K on YouTube

4K-Notifier

Get notified when your video is available in 2160p/4K (or any desired target quality) to everyone on YouTube.

When uploading online, platforms like YouTube transcode your videos, and this saves you from constantly having to check in their clunky Studio page

It uses yt-dlp to get the available resolutions from YouTube (parses yt-dlp -F <url>)

Every 30 seconds, it'll check the available video quality options, and if it finds the configured one (default is 4k) it beeps and copies the URL to your clipboard

It's easily useable via PowerShell: 

iex(irm tl.ctt.cx); 4K-Notifier https://www.youtube.com/watch?v=Ihj7Cbg49TI

You can also make a dead simple batch-file for it:

@echo off
title 4K-Notifier
set /p "URL=YouTube URL: "
PowerShell "iex(irm tl.ctt.cx); 4K-Notifier '%URL%'"

Save this to a .bat and make a shortcut to it in %PROGRAMDATA%\Microsoft\Windows\Start Menu\Programs\

Or run it yourself: https://github.com/couleur-tweak-tips/TweakList/blob/master/modules/Miscellaneous/4K-Notifier.ps1

Reduce file size / convert your video to a more compatible format

reenc

reeenc (to re-encode) is a simple script by atzur that runs the following command on videos you feed it:

ffmpeg -i $in -c:v libx264 -preset slower -crf 18 -x264-params aq-mode=3 -c:a aac -b:a 256k -pix_fmt yuv420p $out-reenc.mp4

This compresses without degrading much, and converts any exotic video/audio/container to the standard: H.264/AAC MP4, which can be thrown into every program without any compatibilities if you had any with your original video file.

  • re-encodes video in the h.264 codec
    • with constant rate factor set to 18
    • sets aqmode to 3
      1. sets adaptative quantizers mode to auto vaq (biased), it quantizes less detailed image areas more strongly, the saved bits can then be used in other parts of the image to preserve details.
  • re-encodes audio to AAC
    • with a bitrate of 256kbps
  • enforces the pixel format to YUV 4:2:0
  • sets the output container to MPEG-4

Learn more about H.264 encoding here

Installation

Open PowerShell and paste in the following command to save the batch-file in Send To 

powershell "(irm https://github.com/atzuur/scripts/raw/main/reenc.bat) | Out-File (Join-Path ([Environment]::GetFolderPath('SendTo')) reenc.bat) -Encoding ASCII"

Extract a single frame from a video

https://github.com/Thqrn/ffmpeg-scripts/blob/main/video%20frame%20extractor.bat

Simple version of the CTT Upscaler 
@echo off
title CTT Simplescaler
:: Attempts to go where FFmpeg can be found (fails silently)
cd /d "C:\ffmpeg\bin" >nul 2>&1


:: Check for FFmpeg
where ffmpeg.exe >nul 2>&1 || (
echo FFmpeg not found, installing!
:: Uses TweakList's scoop wrapper to get FFmpeg and add it to PATH
PowerShell "iex(irm tl.ctt.cx);Get FFmpeg"
:: Check again
where ffmpeg.exe >nul 2>&1 || (
color 4F
echo ERROR: Failed to install FFmpeg!
pause > nul
exit
)
echo Successfully installed FFmpeg!
)


:: If there is no first argument (video), instruct user
if "%~1"=="" (
color 4F
echo ERROR: no input file
echo In order to upscale a video with this script:
echo 1 - Select your video in the file explorer
echo 2 - Drag it onto the .bat you've just opened
echo 3 - After it's done find it at ^<filename^>-Upscaled.mp4 in the same folder!
echo Press any key to exit
pause > nul
exit /b
)

:: Change resolution here
set vf=-vf scale=3840:2160:flags=neighbor
:: Change to a GPU encoder here
set encargs=-c:v libx264 -preset medium -crf 20 -c:a copy


echo Upscaling %~n1
ffmpeg.exe -i "%~1" -loglevel warning -stats %vf% %encargs% "%~dpn1-Upscaled.mp4"
if %ERRORLEVEL% == 0 (exit) else (pause)
Compare two videos side-by-side

Install video-compare and use it with SendTo

Extract a specific frame from a video

Use S in mpv to take a screenshot of the current frame

Remux to .MP4

You can simply do ffmpeg -i input -c copy output.mp4

what matter here is -c copy which behaves like -:ca copy c:v copy, which copies the audio and video streams losslessly and instantly

script pending

Replace audio

See Frost's audio scripts: https://github.com/Thqrn/ffmpeg-scripts/

tmix
Cut from point a to b

You can use -ss and -to, but you should really use a cutter

Frost also made a simple script for that if you prefer typing timestamps in https://github.com/Thqrn/ffmpeg-scripts/blob/main/video%20trimmer.bat