The code in this repository allows you to download videos unencumbered with DRM from Hulu. The code in `widevine` is in general independent of the Hulu related code and can be used for Widevine license generation/decryption. The code in `hulu` is also standalone but only implements a handful of endpoints that are basically only useful for a command line tool of this nature.
## Prerequisites
The code in this repository by itself does not require any external libraries or tools to be installed. It merely finds the video URLs and decryption keys. The only dependencies required are cryptographic libraraies specified in go.mod but Go should handle these automatically. However, to actually perform MP4 decryption, Bento4 (and specifically its `mp4decrypt` tool) are required. Bento4 is an open source library for MP4 manipulation. Binary releases of its tools can be downloaded [here](https://www.bento4.com/downloads/). [`yt-dlp`](https://github.com/yt-dlp/yt-dlp) is also required to download the MPD playlist files to mp4s. Technically, this could be implemented rather easily in this repository but I want to keep this repository simple and avoid rewriting code to deal with segment merging or quality selection menus.
## Retrieving Hulu Session Cookie
Hulu requires Recaptcha for authentication so just passing account credentials is not possible without captcha solving services. To work around this, this tool simply takes a Hulu session cookie.
> Note: Ensure you are signed in before following these steps.
### Chrome
Visit [https://hulu.com](https://hulu.com). Click the lock icon in the URL bar. Then select the item labelled Cookies. Then find hulu.com in the list, select it, and expand the "Cookies" list with an icon that looks like a folder. Then select the cookie titled `_hulu_session`. Chrome will then show various attributes of this cookie. Right click the area labelled "Content", press select all and then right click again and press copy. The value of the Hulu session cookie is now on your clipboard. A demonstration can be found [here](https://www.cookieyes.com/wp-content/uploads/2021/10/chrome2.mp4).
### Firefox
Visit [https://hulu.com](https://hulu.com). Right click and then click Inspect. Then visit the Storage tab. Now, under the cookies pane on the left, select hulu.com. Then retrieve the value of `_hulu_session` from the list of cookies. A demonstration can be found [here](https://www.cookieyes.com/wp-content/uploads/2021/10/firefox1.mp4).
## Demonstration
Say we want to download an episode of M\*A\*S\*H.
$ go install github.com/chris124567/hulu # The rest of these commands assume $GOPATH/bin is in your PATH. If it is not, just cd to $GOPATH/bin and run "./hulu" instead of "hulu"
$ HULU_SESSION="abc" hulu search -query="m*a*s*h"
Title ID
M*A*S*H ae94231d-0f04-482a-b9ee-9911e339e3ed
MASH (1970) 42f7eefe-2448-4ed5-87cb-6233c89c20f6
American Psycho (2000) 404a410c-ef36-469d-8fcd-1f93ec44a5c0
American Horror Story a67a233c-fcfe-4e8e-b000-052603ddd616
The Martian (2015) e52328e3-6e2b-4565-91d5-2f7ee7c846ab
HBO Max 1b3523c1-3090-4c27-a1e8-a04d33867c34
...
We want the M\*A\*S\*H TV show, so we choose the ID "ae94231d-0f04-482a-b9ee-9911e339e3ed." We want to look at the first season so we specify that the season number equals 1.
$ HULU_SESSION="abc" hulu season -id="ae94231d-0f04-482a-b9ee-9911e339e3ed" -number=1
Title ID
Pilot 4045ee04-07e8-4c33-94a6-4244b7b67c5f
To Market, to Market 7a43d075-2b47-4c94-8767-8531e20bab81
Requiem for a Lightweight 2ccd2cf5-a013-4501-a689-1ed6b94a9549
Yankee Doodle Doctor 3ff14d70-e2ac-4bc2-83c6-87b9cf132c13
...
Now to get the episode we want (the pilot), pass the ID of the episode to the `download` subcommand.
> Note: If we wanted to download a movie, instead of getting the episode list (which movies don't have) and selecting the specific episode ID, just pass the original ID from the search results above to `download`.
$ HULU_SESSION="abc" hulu download -id="4045ee04-07e8-4c33-94a6-4244b7b67c5f"
Now we should have two mp4 files, one for the video and one for the audio. We ultimately will merge these, but first we need to decrypt them.
Remember the mp4decrypt command from above? Specifically look at the `--key OMITTED:OMITTED` part. The decryption key is the same for both the video and the audio. So we can run:
