Aristo Science Workbook 2b Answer Verified _top_ -

I've done a quick batch file to download 1080p youtube videos from windows command line. It is based on youtube-dl, but since youtube now uses its DASH format for 1080p, you have to download video and audio separately, then recombine them.

You need :
youtube-dl.exe from https://rg3.github.io/youtube-dl/download.html
ffmpeg.exe from http://ffmpeg.zeranoe.com/builds/
Please adapt the path to these static executables in the script.

Usage : to download "Handmade Hero Day 050 - Basic Minkowski-based Collision Detection", type


Now the script :

You really don't need manually combine audio and video files. youtube-dl will do that automatically if you have ffmpeg executable avaialble in PATH (or current folder). So simply running:
will create one mp4 file with video and audio in it.

Just tested, it works very well. Excellent!

Thank you for the tip.

Cheers, for both of these tips, chaps. So the youtube line in my own dlhmh (zsh, although I think it's all bash-compatible) script now reads:



The script also downloads the latest source .zip and has a commented line ready for the assets.

I have made a Windows only download script at the start of the series.

You can find the instructions at:

http://www.reddit.com/r/HandmadeH...hzo/handmadehero_download_script/

Currently it only supports downloading the source code. I will be adding assets downloading support later.

Understanding how current and voltage behave in different circuit setups.

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Properties of acids and alkalis, the pH scale, indicators (litmus paper, universal indicator), neutralization, and everyday uses.

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I am interesting in how youtube-dl extract the URL of a YouTube video.
I looked at the source code but it is complicated python code
but I think it is more likely inside this magic function _extract_signature_function

if anyone knows python better and can tell me how it is extracting the URL, it would be appreciated.
Or simply if I can use the tool to just extract the URL because I want to use a faster downloader and I just want to give it the link.

When I'm using youtube-dl it downloads video with my maximum Internet speed. I don't see how using other downloader would help.

But if you want to use youtube-dl to get URL of actual video file the "--get-url" argument will do that. Look at "youtube-dl --help" for more stuff - like getting title or other info.

If you want to extract URL manually, you can do that from big block of JavaScript code under <div id="player-api"> element.

Thanks. It is very useful.
I love Open Source command line tools.

Do you know why Youtube-dl can't download playlists? It is supposed to.

It downloads for me just fine.
Try "--print-traffic --verbose" arguments to see various debugging information, maybe it will contain some helpful information why it fails for you.

Yeah, it is weird. I am downloading a series (Youtube playlist)of Japanese stories and converting it to .mp3. It works with that list but not for Handmade Hero's Debug Infrastructure playlist. I'll check the verbose debug output from youtube-dl.

[Edit] I am now downloading all the Debug Infrastructure playlist as audio files, it is working properly, I guess it has some issues with the video. [/Edit]

chizran
If anybody is interested, I have added the ability to download assets from sendowl and pre stream Q&A from Twitch to my LINQPad daily download script. As before, it can also download the current source code zip file from sendowl and the latest video uploaded to the YouTube archive.

Requirements:

LINQPad installed.

To be able to download the source code and the assets, you obviously need to preorder the game and supply your sendowl URL per the instructions (below).

For YouTube video download, you need to have both ffmpeg and youtube-dl in your PATH. youtube-dl is required for both Twitch and YouTube, ffmpeg is required only for YouTube.

Instructions:

• •Download, install and run LINQPad.
• •In LINQPad go to File>Open, paste link to the script and click Open.
• •If you want to download videos you have install both ffmpeg and youtube-dl. Easiest way to get them is via chocolatey.
• •Set your parameters and click Execute (F5)
• •When you run the script for the first time, it will ask you for the sendowl URL. You can also set it manually via LINQPads builtin password manager (File>Password Manager) and adding password with the name 'handmadehero.sendowlurl' and value of your full sendowl URL. Passwords are securedly stored with the Windows Data Protection API (check the LINQPad FAQ)

@chizran a quick question - I just found this post - I see that you have pre stream as an option here, I wonder how you download and differentiate it exclusively from the rest of the stream - is it that for (prestream == yes) you get it from Twitch and if no then Youtube? Would you mind shedding some light on it and More importantly, do you have all the previous pre streams and can you make them available somehow? (Read - https://hero.handmadedev.org/foru...on/969-pre-stream-technical-noise)

In his script he downloads prestream video from twitch by specifying to download 2nd, not the 1st most recent video. Youtube-dl can download specified videos in the playlist. You simply pass whole handmade hero archive as a playlist url and item index 1 to youtube-dl, and it will save pre stream video.

As mmozeiko explained, downloading the prestream videos works by specifying the video from the Twitch playlist. Unfortunately, since a few episodes ago, this hasn't been working as expected. YouTube-dl downloads only one video file per broadcast from Twitch. I do have all the files archived, but the latest files are quite large, since these are whole episodes. My upload speed is not the best, but can I least try to get some of them online during the holidays.