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death_extractor

Download youtube videos of Spelunky Daily Challenge, extract death to GIF, post GIF.
Written in/for Python 2.7.5

Dependencies:

ImageMagick, youtube-dl, ffmpeg, opencv (with ffmpeg support), pyimgur, pytumblr, pysnap (via submodule)

Usage:

git clone ...  
cd death_extractor  
git submodule init --update

imgur_secrets, tumblr_secrets and snapchat_secrets list environment variables which should be populated with your access information for these APIs
then run daas.py (Deaths As A Service)

How Does It Work?

Search for YouTube videos which match query "spelunky+daily+challenge".
Maintain a queue of these video IDs, removing any we've already gotten.
With a downloaded video as cv2.VideoCapture object:

  • Start at the last frame of the video
  • Scrub back by ~1sec increments
  • If giant chest found (winner) then move on. If the "skull" UI element is found:
  • Scrub forward by ~0.2s increments until skull is no longer visible
  • Jump back ~3.75sec
  • Push ~4 seconds at ~10fps out to a temporary AVI container
  • Convert temp AVI to grayscale GIF with ImageMagick (usually 800K~1100K)
  • Scrub back from point of death until sum of frame suggests "circular wipe" at stage start
  • Move ahead a bit and look for world label (e.g. MINES, WORM, OLMEC'S LAIR)
  • If world has stages (e.g. MINES 1-2, TEMPLE 4-3) identify which of the stages this is
  • Upload resulting GIF to Imgur/Tumblr linking source video (at timestamp) and tagged with world/stage of death
  • Optionally post a video (cropped, rotated and resized for mobile screen) to Snapchat friends
  • Rinse. Repeat (periodically)

Why Do I Care?

Spelunky deaths are hilarious.
GIF is the native language of Tumblr.
CvVideo is a useful, though limited, class for working with cv2.VideoCapture objects.

TODO:

See GitHub repo's Issues page.