I recorded a live stream from ESPN via n_m3u8DL-RE that was decrypted in real time, but due to an error the latter part of the stream remains encrypted (if the folder of all of segments, there are 4 missing, possibly due to internet issues, and everything after is encrypted). I have tried decrypting segments with mp4decrypt and shaka-packager to no avail, and since this was a live recording I cannot go back and try again. Is there a way to find a key for an already downloaded video?