Get the output file name in lower case

[pritam12426]

DO NOT REMOVE OR SKIP THE ISSUE TEMPLATE

• I understand that I will be blocked if I intentionally remove or skip any mandatory* field

Checklist

• I'm asking a question and not reporting a bug or requesting a feature
• I've looked through the README
• I've verified that I have updated yt-dlp to nightly or master (update instructions)
• I've searched known issues and the bugtracker for similar questions including closed ones. DO NOT post duplicates
• I've read the guidelines for opening an issue

Please make sure the question is worded well enough to be understood

Is there is any way to get the output file name in all lower case

Provide verbose output that clearly demonstrates the problem

• Run your yt-dlp command with -vU flag added (yt-dlp -vU <your command line>)
• If using API, add 'verbose': True to YoutubeDL params instead
• Copy the WHOLE output (starting with [debug] Command-line config) and insert it below

Complete Verbose Output

[debug] Command-line config: ['-vU']
[debug] User config "~/.config/yt-dlp/config": ['-o', '~/Downloads/yt_dlp/%(extractor_key)s/%(title)s.%(ext)s', '-f', '137+140/bestvideo*[height=1080][ext=mp4][fps<=30]+bestaudio*[ext=m4a]/bestvideo*[height=1080][ext=mp4][fps<=60]+bestaudio*[ext=m4a]/bestvideo*[height<=1080][ext=mp4]+bestaudio*[ext=m4a]/bestvideo*[height<=1080]+bestaudio*/bestvideo*+bestaudio*', '--embed-subs', '--restrict-filenames', '--embed-chapters', '--embed-metadata', '--embed-thumbnail', '--write-auto-subs', '--ignore-no-formats-error', '--parse-metadata', 'video::(?P<description>)', '--cache-dir', '~/Library/Caches/yt-dlp', '--embed-info-json']
[debug] Encodings: locale utf-8, fs utf-8, pref utf-8, out utf-8, error utf-8, screen utf-8
[debug] yt-dlp version stable@2024.04.09 from yt-dlp/yt-dlp [ff0779267] (pip)
[debug] Python 3.12.3 (CPython arm64 64bit) - macOS-14.5-arm64-arm-64bit (OpenSSL 3.0.13 30 Jan 2024)
[debug] exe versions: ffmpeg 7.0 (setts), ffprobe 7.0
[debug] Optional libraries: Cryptodome-3.20.0, brotli-1.1.0, certifi-2024.02.02, mutagen-1.47.0, requests-2.31.0, sqlite3-3.45.1, urllib3-2.2.1, websockets-12.0
[debug] Proxy map: {}
[debug] Request Handlers: urllib, requests, websockets
[debug] Loaded 1810 extractors
[debug] Fetching release info: https://api.github.com/repos/yt-dlp/yt-dlp/releases/latest
Latest version: stable@2024.04.09 from yt-dlp/yt-dlp
yt-dlp is up to date (stable@2024.04.09 from yt-dlp/yt-dlp)

[bashonly]

Not possible without external scripting. There is an open feature request: #8008