[Broken] YouTube: --add-metadata fails to add metadata to final file

Checklist

• I’m reporting a broken site support
• I’ve verified that I’m running yt-dlp version 2021.03.24.1
• I’ve checked that all provided URLs are alive and playable in a browser
• I’ve checked that all URLs and arguments with special characters are properly quoted or escaped
• I’ve searched the bugtracker for similar issues including closed ones

Verbose log

[debug] User config file: /home/toakraka/.config/yt-dlp/config
[debug] User config: ['--limit-rate', '1M', '--no-mtime', '--add-metadata', '-o', '%(title)s (%(height)ip%(fps)i, %(uploader)s).%(ext)s', '--windows-filenames', '--format-sort', 'fps,br']
[debug] Command-line config: ['-v', 'https://www.youtube.com/watch?v=j5FF_fkdtoA']
[debug] Loading archive file None
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] yt-dlp version 2021.03.24.1 (zip)
[debug] Python version 3.7.3 (CPython 64bit) - Linux-4.19.0-13-amd64-x86_64-with-debian-10.7
[debug] exe versions: ffmpeg 4.1.6-1, ffprobe 4.1.6-1
[debug] Proxy map: {}
[youtube] j5FF_fkdtoA: Downloading webpage
[debug] Sort order given by user: fps,br
[debug] Formats sorted by: hasvid, ie_pref, lang, fps, tbr, vbr, abr, quality, res, vcodec:vp9.2(10), acodec, filesize, fs_approx, asr, proto, vext, aext, hasaud, source, id
[debug] Default format spec: bestvideo*+bestaudio/best
[info] Downloading format(s) 137+140
[debug] Invoking downloader on 'https://r6---sn-8xgp1vo-ab5l.googlevideo.com/videoplayback?expire=1616915258&ei=2tZfYIyqC4XVgwPt-4XAAQ&ip=108.24.193.10&id=o-AFRi7bHt6xeFtv5XEwdc1W-DewAFTgvpNhKVymxVoQEx&itag=137&aitags=133%2C134%2C135%2C136%2C137%2C160%2C242%2C243%2C244%2C247%2C248%2C278&source=youtube&requiressl=yes&mh=Fu&mm=31%2C29&mn=sn-8xgp1vo-ab5l%2Csn-ab5szn7s&ms=au%2Crdu&mv=m&mvi=6&pcm2cms=yes&pl=16&initcwndbps=1135000&vprv=1&mime=video%2Fmp4&ns=TWUknlCrxWNDipxWNm0ASdIF&gir=yes&clen=168392279&dur=887.653&lmt=1594377679520025&mt=1616893481&fvip=6&keepalive=yes&fexp=24001373%2C24007246&c=WEB&txp=6432432&n=0_RNU7_2l0aeSwUr_jpWM&sparams=expire%2Cei%2Cip%2Cid%2Caitags%2Csource%2Crequiressl%2Cvprv%2Cmime%2Cns%2Cgir%2Cclen%2Cdur%2Clmt&sig=AOq0QJ8wRQIgMWrLqeb9ejq7EVDZkfpmextZLnIhE-xjWQanhgtwDY8CIQCvi-3_i7Y75njTWVuGfCyQ0yZWAUsBguDJfViTbGu3CA%3D%3D&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpcm2cms%2Cpl%2Cinitcwndbps&lsig=AG3C_xAwRgIhAO_ZGVyDp6uH9NeTdc3Zdd6jY6pSxaZ7sA7zSy_RrS4jAiEAsLENmvT-CljBtnnMASD2m0TmP1RdHrB-8ezPcz6eiHs%3D'
[download] Destination: Can You Beat Shin Megami Tensei - Nocturne Without Buffs (Part 4) (1080p30, Nyarly).f137.mp4

[download]   0.0% of 160.59MiB at 626.39KiB/s ETA 04:24
...
[download] 100.0% of 160.59MiB at 1023.59KiB/s ETA 00:00
[download] 100% of 160.59MiB in 02:42
[debug] Invoking downloader on 'https://r6---sn-8xgp1vo-ab5l.googlevideo.com/videoplayback?expire=1616915258&ei=2tZfYIyqC4XVgwPt-4XAAQ&ip=108.24.193.10&id=o-AFRi7bHt6xeFtv5XEwdc1W-DewAFTgvpNhKVymxVoQEx&itag=140&source=youtube&requiressl=yes&mh=Fu&mm=31%2C29&mn=sn-8xgp1vo-ab5l%2Csn-ab5szn7s&ms=au%2Crdu&mv=m&mvi=6&pcm2cms=yes&pl=16&initcwndbps=1135000&vprv=1&mime=audio%2Fmp4&ns=TWUknlCrxWNDipxWNm0ASdIF&gir=yes&clen=14367465&dur=887.722&lmt=1594376065267111&mt=1616893481&fvip=6&keepalive=yes&fexp=24001373%2C24007246&c=WEB&txp=6431432&n=0_RNU7_2l0aeSwUr_jpWM&sparams=expire%2Cei%2Cip%2Cid%2Citag%2Csource%2Crequiressl%2Cvprv%2Cmime%2Cns%2Cgir%2Cclen%2Cdur%2Clmt&sig=AOq0QJ8wRAIgK1hl36C637ht02ntbtbVOZp9pQKSRL0hbl56CbWxCxoCIEFoAq_nsgDAQuAA9Jl1COkIylSyhRJEwyjdwnXA-zRY&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpcm2cms%2Cpl%2Cinitcwndbps&lsig=AG3C_xAwRgIhAO_ZGVyDp6uH9NeTdc3Zdd6jY6pSxaZ7sA7zSy_RrS4jAiEAsLENmvT-CljBtnnMASD2m0TmP1RdHrB-8ezPcz6eiHs%3D'
[download] Destination: Can You Beat Shin Megami Tensei - Nocturne Without Buffs (Part 4) (NApNA, Nyarly).f140.m4a

[download]   0.0% of 13.70MiB at 273.65KiB/s ETA 00:51
...
[download] 100.0% of 13.70MiB at 1023.58KiB/s ETA 00:00
[download] 100% of 13.70MiB in 00:14
[Merger] Merging formats into "Can You Beat Shin Megami Tensei - Nocturne Without Buffs (Part 4) (1080p30, Nyarly).mp4"
[debug] ffmpeg command line: ffmpeg -y -loglevel repeat+info -i 'file:Can You Beat Shin Megami Tensei - Nocturne Without Buffs (Part 4) (1080p30, Nyarly).f137.mp4' -i 'file:Can You Beat Shin Megami Tensei - Nocturne Without Buffs (Part 4) (NApNA, Nyarly).f140.m4a' -c copy -map 0:v:0 -map 1:a:0 'file:Can You Beat Shin Megami Tensei - Nocturne Without Buffs (Part 4) (1080p30, Nyarly).temp.mp4'
Deleting original file Can You Beat Shin Megami Tensei - Nocturne Without Buffs (Part 4) (NApNA, Nyarly).f140.m4a (pass -k to keep)
Deleting original file Can You Beat Shin Megami Tensei - Nocturne Without Buffs (Part 4) (1080p30, Nyarly).f137.mp4 (pass -k to keep)
[Metadata] Adding metadata to 'Can You Beat Shin Megami Tensei - Nocturne Without Buffs (Part 4) (1080p30, Nyarly).mp4'
[debug] ffmpeg command line: ffmpeg -y -loglevel repeat+info -i 'file:Can You Beat Shin Megami Tensei - Nocturne Without Buffs (Part 4) (1080p30, Nyarly).mp4' -map 0 -dn -c copy -metadata 'title=Can You Beat Shin Megami Tensei: Nocturne Without Buffs (Part 4)' -metadata date=20200708 -metadata 'description=Subscribe for more SMT and Persona videos!

Follow me on Twitter: https://twitter.com/crawling_nyarly
Consider donating on Ko-Fi: https://ko-fi.com/nyarly
Subscribe to my Twitch channel: https://www.twitch.tv/nyaarly

Part 3: https://www.youtube.com/watch?v=3n4wtSj59rE

After failing to complete the challenge in the last part, Demi-Fiend takes some more time to grind all the way to the max level, and is now back for revenge! Will he be able to beat the bosses originally deemed impossible without having to use buffs this time?

Intro by Lyric: https://www.youtube.com/channel/UCN508DxgoQofsmst-d1BFDQ

The unofficial patch I used to play Nocturne Maniax Chronicle Edition can be found here: https://www.romhacking.net/translations/3283/

#SMT #ShinMegamiTensei #Nocturne' -metadata 'synopsis=Subscribe for more SMT and Persona videos!

Follow me on Twitter: https://twitter.com/crawling_nyarly
Consider donating on Ko-Fi: https://ko-fi.com/nyarly
Subscribe to my Twitch channel: https://www.twitch.tv/nyaarly

Part 3: https://www.youtube.com/watch?v=3n4wtSj59rE

After failing to complete the challenge in the last part, Demi-Fiend takes some more time to grind all the way to the max level, and is now back for revenge! Will he be able to beat the bosses originally deemed impossible without having to use buffs this time?

Intro by Lyric: https://www.youtube.com/channel/UCN508DxgoQofsmst-d1BFDQ

The unofficial patch I used to play Nocturne Maniax Chronicle Edition can be found here: https://www.romhacking.net/translations/3283/

#SMT #ShinMegamiTensei #Nocturne' -metadata 'purl=https://www.youtube.com/watch?v=j5FF_fkdtoA' -metadata 'comment=https://www.youtube.com/watch?v=j5FF_fkdtoA' -metadata artist=Nyarly 'file:Can You Beat Shin Megami Tensei - Nocturne Without Buffs (Part 4) (1080p30, Nyarly).temp.mp4'

Description

For this video, the program fails to add metadata to the final file, even though the --add-metadata option is enabled. When I look at the file in VLC Media Player, the “Metadata” tab is completely empty. (The video description isn’t added to the “Comments” field, either.)

[pukkandan]

The metadata is in fact being added as @nicolaasjan has shown above. I don’t know why VLC can’t read it. Is it able to read the metadata if you download the same formats with youtube-dl? If not, you probably should ask this to VLC devs instead.

The video description isn’t added to the “Comments” field, either.

According to kdenlive and ffmpeg, comment is supposed to be a short description and synopsis is the long description for mp4. So, the video description is added to synopsis (and description field which mp4 doesnt support) while the webpage URL is saved in comment field.

[ToaKraka]

Then this is indeed a VLC issue. Will close once @ToaKraka can confirm

Yes, this is what happens after I update my VLC installation:

[Edit] Just tried it in a Windows virtual machine with VLC 3.0.12 and there the metadata tab is also empty, but the Comments field of the yt-dlp downloaded video contains the long description, just like the youtube-dl downloaded one. Huh?