ERROR: unable to open for writing: [Errno 36] File name too long:

[hadmut]

Checklist

• [ X] I'm reporting a broken site support :

Downloading Videos from Twitter

• [X ] I've verified that I'm running youtube-dl version 2020.05.08
  % /tmp/youtube-dl -v
  [debug] youtube-dl version 2020.05.08

• [X ] I've checked that all provided URLs are alive and playable in a browser

youtube-dl 'https://twitter.com/mknrdt/status/1263357611950342145'

• [ X] I've checked that all URLs and arguments with special characters are properly quoted or escaped
• [ X] I've searched the bugtracker for similar issues including closed ones

Verbose log

% youtube-dl 'https://twitter.com/mknrdt/status/1263357611950342145'
[twitter] 1263357611950342145: Downloading guest token
[twitter] 1263357611950342145: Downloading JSON metadata
[twitter] 1263357611950342145: Downloading m3u8 information
ERROR: unable to open for writing: [Errno 36] File name too long: "Mathijs Koenraadt - Absolutely shocking footage has emerged from a black male nurse from Detroit (Jadon H.), who filmed himself beating elderly white men into a bloody pulp. 'Get the fuck off my bed, N.,' he is heard saying. Viewer discretion advised.-1263357611950342145.mp4.part"

Description

It might be a general problem and affect other sites as well, but I've observed it for downloadings from twitter only (but many times):

youtube-dl tries to put the whole tweet into the filename and fails because of exceeding the maximum file name length.

In this case the maximum file name length is 255 (ext4 file system) but youtube-dl tries to use around 285 characters

Workaround: give a filename with option -o (cumbersome)

Solution: Use the statfs system call to get the maximum file name length supported by the file system you're trying to write to and shorten the text put into the filename accordingly (i.e. keep and respect the file name endings like .mp4 and .mp4.part, and the tweet number, and just take a fitting number of characters from the tweet).

See
http://man7.org/linux/man-pages/man2/statfs.2.html