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• How can I use ffmpeg and youtube-dl to download the first frame of every video in a playlist ?

  18 janvier, par Chi Long Qua

  I'm trying to download only the first frame of every video in a large playlist on YouTube. Does anybody know how I can use ffmpeg and youtube-dl to do this ?

  


• How to capture multiple screenshot from youtube video using ffmpeg with specific seek time

  9 août 2017, par Md. Mehedi Hasan

  I’m using ffmpeg to take screenshot from youtube video. I want to seek multiple timeline. I’ve used the following command to capture 1 screenshot by seek command :
  ffmpeg -ss 00:02:10 -i "youtube-stream-url" -frames:v 1 out1.jpg

  How I can take multiple screenshot via multiple seek time. I’ve searched for the solution but no success.

  I’ve used the following command to take multiple screenshot as follows :
  ffmpeg -noaccurate_seek -ss 00:01:10 -i "youtube-stream-url" -map 0:v:0 -vframes 1 -f mpeg "thumb/output_01.jpg" -ss 00:02:10 -i "youtube-stream-url" -map 1:v:0 -vframes 1 -f mpeg "thumb/output_02.jpg"

  Is there any way to generate screenshots from same input via seek command ? How to make it more faster ? How to skip multiple input(-i param) ? I’ve also tried with other commands but those are more slower. Can anyone help me ?

• How to convert messed-up .vtt sub file from youtube-dl —write-auto-sub download ?

  27 septembre 2023, par perry_the_python

  My goal is to download a YouTube video with auto-generated subtitles in a separate file like .vtt,.srt, etc.

  


  I am currently trying to achieve this with youtube-dl but I am open to other solutions if needed.

  


  When I run the following command, it downloads the video as .mp4 (which is fine) and a separate .vtt file, but the .vtt seems to be messed-up somehow and displays all the text for the whole clip at once instead of the specified times.

  


  Command I am running :

  


  youtube-dl --write-auto-sub https://www.youtube.com/watch?v=Roc89oOZOF4&list=PLJBo3iyb1U0eNNN4Dij3N-d0rCJpMyAKQ&index=45


  


  Downloads this .vtt :

  


  WEBVTT&#xA;Kind: captions&#xA;Language: en&#xA;&#xA;00:00:05.960 --> 00:00:08.290 align:start position:0%&#xA; &#xA;thank &lt;00:00:06.003><c>you  </c>&lt;00:00:06.046><c>ah </c>&lt;00:00:06.089><c>crap  </c>&lt;00:00:06.132><c>well </c>&lt;00:00:06.175><c>looks </c>&lt;00:00:06.218><c>like </c>&lt;00:00:06.261><c>the </c>&lt;00:00:06.304><c>good </c>&lt;00:00:06.347><c>Lord </c>&lt;00:00:06.390><c>just </c>&lt;00:00:06.433><c>sent  </c>&lt;00:00:06.476><c>me </c>&lt;00:00:06.519><c>a </c>&lt;00:00:06.562><c>conversation </c>&lt;00:00:06.605><c>starter </c>&lt;00:00:06.648><c>come </c>&lt;00:00:06.691><c>here  </c>&lt;00:00:06.734><c>Jesse </c>&lt;00:00:06.777><c>come </c>&lt;00:00:06.820><c>get </c>&lt;00:00:06.863><c>the </c>&lt;00:00:06.906><c>ball  </c>&lt;00:00:06.949><c>hmm</c>&#xA;&#xA;00:00:08.290 --> 00:00:10.549 align:start position:0%&#xA;thank you  ah crap  well looks like the good Lord just sent  me a conversation starter come here  Jesse come get the ball  hmm&#xA; &#xA;&#xA;00:00:10.549 --> 00:00:13.070 align:start position:0%&#xA; &#xA; &#xA;&#xA;00:00:13.070 --> 00:00:15.470 align:start position:0%&#xA; &#xA; &#xA;&#xA;00:00:15.470 --> 00:00:23.750 align:start position:0%&#xA; &#xA; &#xA;&#xA;00:00:23.750 --> 00:00:23.760 align:start position:0%&#xA; &#xA; &#xA;&#xA;00:00:23.760 --> 00:00:26.480 align:start position:0%&#xA; &#xA;&#xA;&#xA;&#xA;

  


  I have read that this may be done on purpose by YouTube.

  


  Even if this is true, is there any way to convert this .vtt to a usable format or simply download correctly-formatted auto-generated subtitles from YouTube ?

  


  Python, FFMPEG, cmd-line preferred, but anything is helpful !

  


  Thanks ! Any and all assistance is greatly appreciated !