certification error with yt-dlp

[blanc]

Hi,

while trying to download a video file I got this error:

yt-dlp https://media.defcon.org/DEF%20CON%2020/DEF%20CON%2020%20video%20and%20slides/DEF%20CON%2020%20-%20Cutaway%20-%20Looking%20Into%20The%20Eye%20Of%20The%20Meter%20-%20Video%20and%20Slides.mp4

[generic] DEF CON 20 - Cutaway - Looking Into The Eye Of The Meter - Video and Slides: Requesting header
WARNING: [generic] Could not send HEAD request to https://media.defcon.org/DEF%20CON%2020/DEF%20CON%2020%20video%20and%20slides/DEF%20CO...%20Slides.mp4: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1131)>
[generic] DEF CON 20 - Cutaway - Looking Into The Eye Of The Meter - Video and Slides: Downloading webpage
ERROR: [generic] Unable to download webpage: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1131)> (caused by URLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1131)'))) (caused by URLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1131)')))

What does it mean? Why do I need certification? This file can be achieved in browser.

[[ss]vegeta]

--no-check-certificate

however there's no need for ytdlp since you can right click -> save as
in Firefox at least.

Weirdly it doesn't play in my Firefox but there's audio. And also, when downloaded, seeking seems to stop the video.

[lomero]

you have already link to your video mp4. no need yt-dlp
put your direct link into an download manager like IDM or simply put on address bar and save as

https://media.defcon.org/DEF%20CON%2020/DEF%20CON%2020%20video%20and%20slides/DEF%20CON%2020%20-%20Cutaway%20-%20Looking%20Into%20The%20Eye%20Of%20The%20Meter%20-%20Video%20and%20Slides.mp4

[Attachment 63990 - Click to enlarge]

[blanc]

I tried another tool:

curl -0 https://media.defcon.org/DEF%20CON%2020/DEF%20CON%2020%20video%20and%20slides/DEF%20CO...d%20Slides.mp4

The result:

curl: (35) schannel: next InitializeSecurityContext failed: SEC_E_ILLEGAL_MESSAGE (0x80090326) - This error usually occurs when a fatal SSL/TLS alert is received (e.g. handshake failed). More detail may be available in the Windows System event log.

It seems the error is related to TLS. Any ideas?

[lomero]

curl for this??

simply click on https link with right key and "save as" ...

[[ss]vegeta]

Any ideas?

Yes, keep trying other tools.

[blanc]

I just wan to understand why it doesn’t work with curl, pure technically.

[pkp]

I just wan to understand why it doesn’t work with curl, pure technically.

working fine here

[lomero]

@blanc

curl -O link

you have used curl -0 (zero) link

[jack_666]

this was a very interesting discussion (for me at least).

Curl worked for pkp but did not work for blanc. I checked and it did not work for me. Head scratcher.

Fortunately for me/us pkp was kind enough (thanks pkp) to tell us the version of curl that he used.

Curl for windows is a real mess. The version that Microsoft added to windows seems to be quite limited in it's abilities.

For the download to work as per pkp, you need to use the version that he /she used.

[lomero]

i think problem isn't version, but wrong command ... i have different (old version) and work already with right command:

curl -O https://media.defcon.org/DEF%20CON%2020/DEF%20CON%2020%20video%20and%20slides/DEF%20CON%2020%20-%20Cutaway%20-%20Looking%20Into%20The%20Eye%20Of%20The%20Meter%20-%20Video%20and%20Slides.mp4

[Attachment 64045 - Click to enlarge]

[jack_666]

thanks lomero

[blanc]

I installed version 7.81. Guess what? It works. My old version was 7.79. Thanks guys.

[lomero]

latest version is 7.82
https://curl.se/windows/

or other OS https://curl.se/download.html